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audit-userspace
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v3.0.6
src/ausearch-parse.c
2 782 строки
54 KB
Steve Grubb
Couple more fuzzer induced bug fixes
09 авг 2021, 21:16
09 авг 2021, 21:16
d4bb920
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/* * ausearch-parse.c - Extract interesting fields and check for match * Copyright (c) 2005-08,2011,2013-14,2018-21 Red Hat * Copyright (c) 2011 IBM Corp. * All Rights Reserved. * * This software may be freely redistributed and/or modified under the * terms of the GNU General Public License as published by the Free * Software Foundation; either version 2, or (at your option) any * later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; see the file COPYING. If not, write to the * Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor * Boston, MA 02110-1335, USA. * * Authors: * Steve Grubb <sgrubb@redhat.com> * Marcelo Henrique Cerri <mhcerri@br.ibm.com> */ #include "config.h" #include <stdio.h> #include <string.h> #include <errno.h> #include <stdlib.h> #include <sys/socket.h> #include <sys/un.h> #include <netdb.h> #include <limits.h> /* PATH_MAX */ #include <ctype.h> #include "libaudit.h" #include "ausearch-options.h" #include "ausearch-lookup.h" #include "ausearch-parse.h" #include "auparse-idata.h" #include "ausearch-nvpair.h" #define NAME_OFFSET 28 static const char key_sep[2] = { AUDIT_KEY_SEPARATOR, 0 }; static int parse_task_info(lnode *n, search_items *s); static int parse_syscall(lnode *n, search_items *s); static int parse_dir(const lnode *n, search_items *s); static int common_path_parser(search_items *s, char *path); static int avc_parse_path(const lnode *n, search_items *s); static int parse_path(const lnode *n, search_items *s); static int parse_user(const lnode *n, search_items *s, anode *avc); static int parse_obj(const lnode *n, search_items *s); static int parse_login(const lnode *n, search_items *s); static int parse_daemon1(const lnode *n, search_items *s); static int parse_daemon2(const lnode *n, search_items *s); static int parse_sockaddr(const lnode *n, search_items *s); static int parse_avc(const lnode *n, search_items *s); static int parse_integrity(const lnode *n, search_items *s); static int parse_kernel_anom(const lnode *n, search_items *s); static int parse_simple_message(const lnode *n, search_items *s); static int parse_tty(const lnode *n, search_items *s); static int parse_pkt(const lnode *n, search_items *s); static int parse_kernel(lnode *n, search_items *s); static int audit_avc_init(search_items *s) { if (s->avc == NULL) { //create s->avc = malloc(sizeof(alist)); if (s->avc == NULL) return -1; alist_create(s->avc); } return 0; } /* * This function will take the list and extract the searchable fields from it. * It returns 0 on success and 1 on failure. */ int extract_search_items(llist *l) { int ret = 0; lnode *n; search_items *s = &l->s; list_first(l); n = list_get_cur(l); if (n) { do { switch (n->type) { case AUDIT_SYSCALL: ret = parse_syscall(n, s); break; case AUDIT_CWD: ret = parse_dir(n, s); break; case AUDIT_AVC_PATH: ret = avc_parse_path(n, s); break; case AUDIT_PATH: ret = parse_path(n, s); break; case AUDIT_USER: case AUDIT_FIRST_USER_MSG...AUDIT_USER_END: case AUDIT_USER_CHAUTHTOK...AUDIT_LAST_USER_MSG: case AUDIT_FIRST_USER_MSG2...AUDIT_LAST_USER_MSG2: ret = parse_user(n, s, NULL); break; case AUDIT_SOCKADDR: ret = parse_sockaddr(n, s); break; case AUDIT_LOGIN: ret = parse_login(n, s); break; case AUDIT_IPC: case AUDIT_OBJ_PID: ret = parse_obj(n, s); break; case AUDIT_DAEMON_START: case AUDIT_DAEMON_END: case AUDIT_DAEMON_ABORT: case AUDIT_DAEMON_CONFIG: case AUDIT_DAEMON_ROTATE: case AUDIT_DAEMON_RESUME: ret = parse_daemon1(n, s); break; case AUDIT_DAEMON_ACCEPT: case AUDIT_DAEMON_CLOSE: ret = parse_daemon2(n, s); break; case AUDIT_CONFIG_CHANGE: ret = parse_simple_message(n, s); // We use AVC parser because it just looks for // the one field. We don't care about return // code since older events don't have path= avc_parse_path(n, s); break; case AUDIT_AVC: case AUDIT_USER_AVC: ret = parse_avc(n, s); break; case AUDIT_NETFILTER_PKT: ret = parse_pkt(n, s); break; case AUDIT_FEATURE_CHANGE: case AUDIT_ANOM_LINK: ret = parse_task_info(n, s); break; case AUDIT_SECCOMP: case AUDIT_ANOM_PROMISCUOUS: case AUDIT_ANOM_ABEND: // AUDIT_FIRST_KERN_ANOM_MSG...AUDIT_LAST_KERN_ANOM_MSG: ret = parse_kernel_anom(n, s); break; case AUDIT_MAC_POLICY_LOAD...AUDIT_MAC_UNLBL_STCDEL: ret = parse_simple_message(n, s); break; case AUDIT_INTEGRITY_DATA...AUDIT_INTEGRITY_RULE: ret = parse_integrity(n, s); break; case AUDIT_KERNEL: case AUDIT_SELINUX_ERR: case AUDIT_EXECVE: case AUDIT_IPC_SET_PERM: case AUDIT_MQ_OPEN: case AUDIT_MQ_SENDRECV: case AUDIT_MQ_NOTIFY: case AUDIT_MQ_GETSETATTR: case AUDIT_FD_PAIR: case AUDIT_BPRM_FCAPS: case AUDIT_CAPSET: case AUDIT_MMAP: case AUDIT_PROCTITLE: case AUDIT_REPLACE...AUDIT_BPF: // Nothing to parse break; case AUDIT_NETFILTER_CFG: case AUDIT_EVENT_LISTENER: ret = parse_kernel(n, s); break; case AUDIT_TTY: ret = parse_tty(n, s); break; default: if (event_debug) fprintf(stderr, "Unparsed type:%d\n - skipped", n->type); break; } if (event_debug && ret) fprintf(stderr, "Malformed event skipped, rc=%d. %s\n", ret, n->message); } while ((n=list_next(l)) && ret == 0); } return ret; } /* * returns malloc'ed buffer on success and NULL on failure */ static nvlist uid_nvl; static int uid_list_created=0; static const char *lookup_uid(const char *field, uid_t uid) { const char *value; value = _auparse_lookup_interpretation(field); if (value) return value; if (uid == 0) return strdup("root"); else if (uid == -1) return strdup("unset"); if (uid_list_created == 0) { search_list_create(&uid_nvl); search_list_clear(&uid_nvl); uid_list_created = 1; } if (search_list_find_val(&uid_nvl, uid)) { return strdup(uid_nvl.cur->name); } else { struct passwd *pw; pw = getpwuid(uid); if (pw) { nvnode nv; nv.name = strdup(pw->pw_name); nv.val = uid; search_list_append(&uid_nvl, &nv); return strdup(pw->pw_name); } } return NULL; } void lookup_uid_destroy_list(void) { if (uid_list_created == 0) return; search_list_clear(&uid_nvl); uid_list_created = 0; } static int parse_task_info(lnode *n, search_items *s) { char *ptr, *str, *term; term = n->message; // ppid if (event_ppid != -1) { str = strstr(term, "ppid="); if (str != NULL) { // ppid is an optional field ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 14; *term = 0; errno = 0; s->ppid = strtoul(ptr, NULL, 10); if (errno) return 15; *term = ' '; } } // pid if (event_pid != -1) { str = strstr(term, " pid="); if (str == NULL) return 16; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 17; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 18; *term = ' '; } // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(term, "auid="); if (str == NULL) { str = strstr(term, "loginuid="); if (str == NULL) return 19; ptr = str + 9; } else ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 20; *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 21; *term = ' '; if (s->tauid) free((void *)s->tauid); s->tauid = lookup_uid("auid", s->loginuid); } // optionally get uid if (event_uid != -1 || event_tuid) { try_again: str = strstr(term, "uid="); if (str == NULL) return 22; // This sometimes hits auid instead of uid. If so, retry. if (*(str-1) == 'a') { term = str +1; goto try_again; } ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 23; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 24; *term = ' '; if (s->tuid) free((void *)s->tuid); s->tuid = lookup_uid("uid", s->uid); } // optionally get gid if (event_gid != -1) { str = strstr(term, "gid="); if (str == NULL) return 25; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 26; *term = 0; errno = 0; s->gid = strtoul(ptr, NULL, 10); if (errno) return 27; *term = ' '; } // euid if (event_euid != -1 || event_teuid) { str = strstr(term, "euid="); if (str == NULL) return 28; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 29; *term = 0; errno = 0; s->euid = strtoul(ptr, NULL, 10); if (errno) return 30; *term = ' '; s->teuid = lookup_uid("euid", s->euid); } // egid if (event_egid != -1) { str = strstr(term, "egid="); if (str == NULL) return 31; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 32; *term = 0; errno = 0; s->egid = strtoul(ptr, NULL, 10); if (errno) return 33; *term = ' '; } if (event_terminal) { // dont do this search unless needed str = strstr(term, "tty="); if (str) { str += 4; term = strchr(str, ' '); if (term == NULL) return 34; *term = 0; if (s->terminal) // ANOM_NETLINK has one free(s->terminal); s->terminal = strdup(str); *term = ' '; } } // ses if (event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 35; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 36; *term = ' '; } } if (event_comm) { // dont do this search unless needed str = strstr(term, "comm="); if (str) { /* Make the syscall one override */ if (s->comm) { free(s->comm); s->comm = NULL; } str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 37; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } else return 38; } if (event_exe) { // dont do this search unless needed str = strstr(n->message, "exe="); if (str) { str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 39; *term = 0; if (s->exe) // ANOM_NETLINK has one free(s->exe); s->exe = strdup(str); *term = '"'; } else s->exe = unescape(str); } else return 40; } if (event_subject) { // scontext str = strstr(term, "subj="); if (str != NULL) { str += 5; term = strchr(str, ' '); if (term == NULL) return 41; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 42; } } // success if (event_success != S_UNSET) { if (term == NULL) term = n->message; str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 43; if (term) *term = ' '; } } return 0; } static int parse_syscall(lnode *n, search_items *s) { char *ptr, *str, *term; extern int event_machine; int ret; term = n->message; if (report_format > RPT_DEFAULT || event_machine != -1) { // get arch str = strstr(term, "arch="); if (str == NULL) return 1; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 2; *term = 0; errno = 0; s->arch = (int)strtoul(ptr, NULL, 16); if (errno) return 3; *term = ' '; } // get syscall str = strstr(term, "syscall="); if (str == NULL) return 4; ptr = str + 8; term = strchr(ptr, ' '); if (term == NULL) return 5; *term = 0; errno = 0; s->syscall = (int)strtoul(ptr, NULL, 10); if (errno) return 6; *term = ' '; // get success if (event_success != S_UNSET) { str = strstr(term, "success="); if (str) { // exit_group does not set success !?! ptr = str + 8; term = strchr(ptr, ' '); if (term == NULL) return 7; *term = 0; if (strcmp(ptr, "yes") == 0) s->success = S_SUCCESS; else s->success = S_FAILED; *term = ' '; } } // get exit if (event_exit_is_set) { str = strstr(term, "exit="); if (str == NULL) return 8; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 9; *term = 0; errno = 0; s->exit = strtoll(ptr, NULL, 0); if (errno) return 10; s->exit_is_set = 1; *term = ' '; } // get a0 str = strstr(term, "a0="); if (str == NULL) return 11; ptr = str + 3; term = strchr(ptr, ' '); if (term == NULL) return 12; *term = 0; errno = 0; // 64 bit dump on 32 bit machine looks bad here - need long long n->a0 = strtoull(ptr, NULL, 16); // Hex if (errno) return 13; *term = ' '; // get a1 str = strstr(term, "a1="); if (str == NULL) return 11; ptr = str + 3; term = strchr(ptr, ' '); if (term == NULL) return 12; *term = 0; errno = 0; // 64 bit dump on 32 bit machine looks bad here - need long long n->a1 = strtoull(ptr, NULL, 16); // Hex if (errno) return 13; *term = ' '; ret = parse_task_info(n, s); if (ret) return ret; if (event_key) { str = strstr(term, "key="); if (str) { if (!s->key) { //create s->key = malloc(sizeof(slist)); if (s->key == NULL) return 43; slist_create(s->key); } str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 44; *term = 0; if (s->key) { // append snode sn; sn.str = strdup(str); sn.key = NULL; sn.hits = 1; slist_append(s->key, &sn); } *term = '"'; } else { if (s->key) { char *saved; char *keyptr = unescape(str); if (keyptr == NULL) return 45; char *kptr = strtok_r(keyptr, key_sep, &saved); while (kptr) { snode sn; // append sn.str = strdup(kptr); sn.key = NULL; sn.hits = 1; slist_append(s->key, &sn); kptr = strtok_r(NULL, key_sep, &saved); } free(keyptr); } } } } return 0; } static int parse_dir(const lnode *n, search_items *s) { char *str, *term; if (event_filename) { // dont do this search unless needed str = strstr(n->message+NAME_OFFSET, " cwd="); if (str) { str += 5; if (*str == '"') { /* string is normal */ str++; term = strchr(str, '"'); if (term == NULL) return 1; *term = 0; if (!s->cwd) s->cwd = strdup(str); *term = '"'; } else if (!s->cwd) s->cwd = unescape(str); } } return 0; } static int common_path_parser(search_items *s, char *path) { char *term; if (!s->filename) { //create s->filename = malloc(sizeof(slist)); if (s->filename == NULL) return 1; slist_create(s->filename); } if (*path == '"') { /* string is normal */ path++; term = strchr(path, '"'); if (term == NULL) return 2; *term = 0; if (s->filename) { // append snode sn; sn.str = strdup(path); sn.key = NULL; sn.hits = 1; // Attempt to rebuild path if relative if ((sn.str[0] == '.') && ((sn.str[1] == '.') || (sn.str[1] == '/')) && s->cwd) { char *tmp = malloc(PATH_MAX); if (tmp == NULL) { free(sn.str); return 3; } snprintf(tmp, PATH_MAX, "%s/%s", s->cwd, sn.str); free(sn.str); sn.str = tmp; } slist_append(s->filename, &sn); } *term = '"'; } else { if (s->filename) { // append snode sn; sn.key = NULL; sn.hits = 1; if (strncmp(path, "(null)", 6) == 0) { sn.str = strdup("(null)"); goto append; } if (!isxdigit(path[0])) return 4; if (path[0] == '0' && path[1] == '0') sn.str = unescape(&path[2]); // Abstract name else { term = strchr(path, ' '); if (term == NULL) return 5; *term = 0; sn.str = unescape(path); *term = ' '; } if (sn.str == NULL) return 7; // Attempt to rebuild path if relative if ((sn.str[0] == '.') && ((sn.str[1] == '.') || (sn.str[1] == '/')) && s->cwd) { char *tmp = malloc(PATH_MAX); if (tmp == NULL) return 6; snprintf(tmp, PATH_MAX, "%s/%s", s->cwd, sn.str); free(sn.str); sn.str = tmp; } append: slist_append(s->filename, &sn); } } return 0; } /* Older AVCs have path separate from the AVC record */ static int avc_parse_path(const lnode *n, search_items *s) { char *str; if (event_filename) { // dont do this search unless needed str = strstr(n->message, " path="); if (str) { str += 6; return common_path_parser(s, str); } return 1; } return 0; } static int parse_path(const lnode *n, search_items *s) { // We add 32 to message because we do not need to look at // anything before that. Its only time and type. char *str, *term = n->message+NAME_OFFSET; if (event_filename) { // dont do this search unless needed str = strstr(term, " name="); if (str) { int rc; str += 6; rc = common_path_parser(s, str); if (rc) return rc; term = str; // Note that at this point we should be past beginning // and around the path element. The type we search for // is objtype or nametype. Searching for both will // slow us down. So, I'm using what is common to both. str = strstr(term, "type="); if (str) { str += 5; s->filename->cur->key = strdup(str); } } } if (event_object) { // tcontext str = strstr(term, "obj="); if (str != NULL) { str += 4; term = strchr(str, ' '); if (term) *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.tcontext = strdup(str); alist_append(s->avc, &an); if (term) *term = ' '; } else return 7; } } return 0; } static int parse_obj(const lnode *n, search_items *s) { char *str, *term; term = n->message; if (event_object) { // obj context str = strstr(term, "obj="); if (str != NULL) { str += 4; term = strchr(str, ' '); if (term) *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.tcontext = strdup(str); alist_append(s->avc, &an); if (term) *term = ' '; } else return 1; } } return 0; } static int parse_user(const lnode *n, search_items *s, anode *avc) { char *ptr, *str, *term, saved, *mptr; term = n->message; // get pid if (event_pid != -1) { str = strstr(term, "pid="); if (str == NULL) return 1; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 2; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 3; *term = ' '; } // optionally get uid if (event_uid != -1 || event_tuid) { str = strstr(term, "uid="); if (str == NULL) return 4; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 5; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 6; *term = ' '; s->tuid = lookup_uid("uid", s->uid); } // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(term, "auid="); if (str == NULL) { // Try the older one str = strstr(term, "loginuid="); if (str == NULL) return 7; ptr = str + 9; } else ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 8; *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 9; *term = ' '; s->tauid = lookup_uid("auid", s->loginuid); } // ses if (event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 10; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 11; *term = ' '; } } if (event_subject) { // scontext str = strstr(term, "subj="); if (str != NULL) { str += 5; term = strchr(str, ' '); if (term == NULL) return 12; *term = 0; if (avc) { avc->scontext = strdup(str); *term = ' '; } else if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 13; } } // optionally get tcontext if (avc && event_object) { // USER_AVC tcontext str = strstr(term, "tcontext="); if (str != NULL) { str += 9; term = strchr(str, ' '); if (term) { *term = 0; avc->tcontext = strdup(str); *term = ' '; } else term = str; } // Grab tclass if it exists str = strstr(term, "tclass="); if (str) { str += 7; term = strchr(str, ' '); if (term) { *term = 0; avc->avc_class = strdup(str); *term = ' '; } else term = str; } } // optionally get gid if (event_gid != -1) { if (n->type == AUDIT_ADD_GROUP || n->type == AUDIT_DEL_GROUP || n->type == AUDIT_GRP_MGMT) { str = strstr(term, " id="); // Take second shot in the case of MGMT events if (str == NULL && n->type == AUDIT_GRP_MGMT) str = strstr(term, "gid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 31; *term = 0; errno = 0; s->gid = strtoul(ptr, NULL, 10); if (errno) return 32; *term = ' '; } } } if (event_vmname) { str = strstr(term, "vm="); if (str) { str += 3; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 23; *term = 0; s->vmname = strdup(str); *term = '"'; } else s->vmname = unescape(str); } } if (event_uuid) { str = strstr(term, "uuid="); if (str) { str += 5; term = str; while (*term != ' ' && *term != ':' && *term) term++; if (term == str) return 24; saved = *term; *term = 0; s->uuid = strdup(str); *term = saved; } } if (n->type == AUDIT_VIRT_MACHINE_ID) { if (event_subject) { str = strstr(term, "vm-ctx="); if (str != NULL) { str += 7; term = strchr(str, ' '); if (term == NULL) return 27; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 28; } } if (event_object) { str = strstr(term, "img-ctx="); if (str != NULL) { str += 8; term = strchr(str, ' '); if (term == NULL) return 29; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.tcontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 30; } } } else if (n->type == AUDIT_VIRT_RESOURCE) { if (event_filename) { unsigned int incr = 6; str = strstr(term, " path="); if (str == NULL) { incr = 10; str = strstr(term, " new-disk="); } if (str != NULL) { int rc; str += incr; rc = common_path_parser(s, str); if (rc) return rc; term = str; } } } // optionally get uid - some records the second uid is what we want. // USER_LOGIN for example. if (event_uid != -1 || event_tuid) { try_again: str = strstr(term, "uid="); if (str) { // If we found auid, skip and try again if (*(str - 1) == 'a') { term = str +1; goto try_again; } if (*(str - 1) == 's' || *(str - 1) == 'u') goto skip; if (!(*(str - 1) == '\'' || *(str - 1) == ' ')) return 25; ptr = str + 4; term = ptr; while (isdigit(*term)) term++; if (term == ptr) return 14; saved = *term; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 15; *term = saved; if (s->tuid) free((void *)s->tuid); s->tuid = lookup_uid("uid", s->uid); } } skip: mptr = term; if (event_comm) { // dont do this search unless needed str = strstr(mptr, "comm="); if (str) { str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 16; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } } // Get acct for user/group add/del str = strstr(mptr, "acct="); if (str != NULL) { ptr = str + 5; term = ptr + 1; if (*ptr == '"') { while (*term != '"' && *term) term++; saved = *term; *term = 0; ptr++; s->acct = strdup(ptr); *term = saved; } else { /* Handle legacy accts */ char *end = ptr; int legacy = 0; while (*end != ' ' && *end) { if (!isxdigit(*end)) legacy = 1; end++; } term = end; if (!legacy) s->acct = unescape(ptr); else { saved = *term; *term = 0; s->acct = strdup(ptr); *term = saved; } } } mptr = term; // get hostname if (event_hostname) { // dont do this search unless needed str = strstr(mptr, "hostname="); if (str) { str += 9; term = strchr(str, ','); if (term == NULL) { term = strchr(str, ' '); if (term == NULL) return 17; } saved = *term; *term = 0; s->hostname = strdup(str); *term = saved; // Lets see if there is something more // meaningful in addr if (strcmp(s->hostname, "?") == 0) { term++; str = strstr(term, "addr="); if (str) { str += 5; term = strchr(str, ','); if (term == NULL) { term = strchr(str, ' '); if (term == NULL) return 18; } saved = *term; *term = 0; free(s->hostname); s->hostname = strdup(str); *term = saved; } } } } if (event_filename) { // dont do this search unless needed str = strstr(mptr, "cwd="); if (str) { str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 20; *term = 0; s->cwd = strdup(str); *term = '"'; } else { char *end = str; int legacy = 0; while (*end != ' ' && *end) { if (!isxdigit(*end)) { legacy = 1; } end++; } term = end; if (!legacy) s->cwd = unescape(str); else { saved = *term; *term = 0; s->cwd = strdup(str); *term = saved; } } } } if (event_terminal) { // dont do this search unless needed str = strstr(mptr, "terminal="); if (str) { str += 9; term = strchr(str, ' '); if (term == NULL) { term = strchr(str, ')'); if (term == NULL) return 19; } *term = 0; s->terminal = strdup(str); *term = ' '; } } if (event_exe) { // dont do this search unless needed str = strstr(mptr, "exe="); if (str) { str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 26; *term = 0; s->exe = strdup(str); *term = '"'; } else { char *end = str; int legacy = 0; while (*end != ' ' && *end) { if (!isxdigit(*end)) { legacy = 1; } end++; } term = end; if (!legacy) s->exe = unescape(str); else { saved = *term; *term = 0; s->exe = strdup(str); *term = saved; } } } } // get success if (event_success != S_UNSET) { str = strstr(mptr, "res="); if (str) { ptr = str + 4; term = strchr(ptr, '\''); if (term == NULL) return 21; *term = 0; if (strncmp(ptr, "failed", 6) == 0) s->success = S_FAILED; else s->success = S_SUCCESS; *term = '\''; } else if ((str = strstr(mptr, "result="))) { ptr = str + 7; term = strchr(ptr, ')'); if (term == NULL) return 22; *term = 0; if (strcasecmp(ptr, "success") == 0) s->success = S_SUCCESS; else s->success = S_FAILED; *term = ')'; } } /* last return code used = 24 */ return 0; } static int parse_login(const lnode *n, search_items *s) { char *ptr, *str, *term = n->message; // get pid if (event_pid != -1) { str = strstr(term, "pid="); if (str == NULL) return 1; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 2; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 3; *term = ' '; } // optionally get uid if (event_uid != -1 || event_tuid) { str = strstr(term, "uid="); if (str == NULL) return 4; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 5; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 6; *term = ' '; s->tuid = lookup_uid("uid", s->uid); } // optionally get subj if (event_subject) { str = strstr(term, "subj="); if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 12; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 13; *term = ' '; } } // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(term, "new auid="); if (str == NULL) { // 3.14 kernel changed it to the next line str = strstr(term, " auid="); if (str == NULL) { str = strstr(term, "new loginuid="); if (str == NULL) return 7; ptr = str + 13; } else ptr = str + 6; } else ptr = str + 9; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 8; if (term) *term = ' '; s->tauid = lookup_uid("auid", s->loginuid); } // success if (event_success != S_UNSET) { if (term == NULL) term = n->message; str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 9; if (term) *term = ' '; } else // Assume older kernel where always successful s->success = S_SUCCESS; } // ses if (event_session_id != -2 ) { if (term == NULL) term = n->message; str = strstr(term, "new ses="); if (str == NULL) { // The 3.14 kernel changed it to the next line str = strstr(term, " ses="); if (str == NULL) return 14; ptr = str + 5; } else ptr = str + 8; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 11; if (term) *term = ' '; } return 0; } static int parse_daemon1(const lnode *n, search_items *s) { char *ptr, *str, *term, saved, *mptr; // Not all messages have a ')', use it if its there mptr = strchr(n->message, ')'); if (mptr == NULL) mptr = n->message; term = mptr; // optionally get auid if (event_loginuid != -2 || event_tauid) { str = strstr(mptr, "auid="); if (str == NULL) return 1; ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 2; saved = *term; *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 3; *term = saved; s->tauid = lookup_uid("auid", s->loginuid); } // pid if (event_pid != -1) { str = strstr(term, "pid="); if (str == NULL) return 4; ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 5; saved = *term; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 6; *term = saved; } // uid - optional if (event_uid != -1) { ptr = term; str = strstr(term, " uid="); if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 7; saved = *term; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 8; *term = saved; } else term = ptr; } // ses - optional if (event_session_id != -2) { ptr = term; str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 9; saved = *term; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 10; *term = saved; } else term = ptr; } if (event_subject) { // scontext str = strstr(term, "subj="); if (str != NULL) { str += 5; term = strchr(str, ' '); if (term) *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); } else return 11; if (term) *term = ' '; } } // success if (event_success != S_UNSET) { str = strstr(mptr, "res="); if (str) { ptr = term = str + 4; while (isalpha(*term)) term++; if (term == ptr) return 12; saved = *term; *term = 0; if (strncmp(ptr, "failed", 6) == 0) s->success = S_FAILED; else s->success = S_SUCCESS; *term = saved; } } return 0; } static int parse_daemon2(const lnode *n, search_items *s) { char *str, saved, *term = n->message; if (event_hostname) { str = strstr(term, "addr="); if (str) { str += 5; term = strchr(str, ':'); if (term == NULL) { term = strchr(str, ' '); if (term == NULL) return 1; } saved = *term; *term = 0; free(s->hostname); s->hostname = strdup(str); *term = saved; } } if (event_success != S_UNSET) { str = strstr(term, "res="); if (str) { char *ptr; ptr = term = str + 4; while (isalpha(*term)) term++; if (term == ptr) return 2; saved = *term; *term = 0; if (strncmp(ptr, "failed", 6) == 0) s->success = S_FAILED; else s->success = S_SUCCESS; *term = saved; } } return 0; } static int parse_sockaddr(const lnode *n, search_items *s) { char *str; if (event_hostname || event_filename) { str = strstr(n->message, "saddr="); if (str) { unsigned int len = 0; struct sockaddr *saddr; char name[NI_MAXHOST]; str += 6; const char *ptr = str; if (*ptr == '(') { const char *ptr2 = strchr(ptr, ')'); if (ptr2) len = (ptr2 - ptr) + 1; } else { while (isxdigit(ptr[len])) len++; len /= 2; } s->hostname = unescape(str); if (s->hostname == NULL) return 4; saddr = (struct sockaddr *)s->hostname; if (saddr->sa_family == AF_INET) { if (len < sizeof(struct sockaddr_in)) { fprintf(stderr, "sockaddr len too short\n"); return 1; } len = sizeof(struct sockaddr_in); } else if (saddr->sa_family == AF_INET6) { if (len < sizeof(struct sockaddr_in6)) { fprintf(stderr, "sockaddr6 len too short\n"); return 2; } len = sizeof(struct sockaddr_in6); } else if (saddr->sa_family == AF_UNIX) { if (len < 4) { fprintf(stderr, "sun_path len too short\n"); return 3; } struct sockaddr_un *un = (struct sockaddr_un *)saddr; if (event_filename) { if (!s->filename) { //create s->filename = malloc(sizeof(slist)); if (s->filename == NULL) return 4; slist_create(s->filename); } if (s->filename) { // append snode sn; if (un->sun_path[0]) sn.str = strdup(un->sun_path); else sn.str = strdup(un->sun_path+1); sn.key = NULL; sn.hits = 1; slist_append(s->filename, &sn); } free(s->hostname); s->hostname = NULL; return 0; } else { // No file name - no need for socket free(s->hostname); s->hostname = NULL; return 0; } } else { // addr family we don't care about free(s->hostname); s->hostname = NULL; return 0; } if (!event_hostname) { // we entered here for files - discard free(s->hostname); s->hostname = NULL; return 0; } if (getnameinfo(saddr, len, name, NI_MAXHOST, NULL, 0, NI_NUMERICHOST) ) { free(s->hostname); s->hostname = NULL; } else { free(s->hostname); s->hostname = strdup(name); } } } return 0; } static int parse_integrity(const lnode *n, search_items *s) { char *ptr, *str, *term; term = n->message; // get pid str = strstr(term, "pid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 1; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 2; *term = ' '; } // optionally get uid if (event_uid != -1 || event_tuid) { str = strstr(term, " uid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 3; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 4; *term = ' '; s->tuid = lookup_uid("uid", s->uid); } } // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(n->message, "auid="); if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 5; *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 6; *term = ' '; s->tauid = lookup_uid("auid", s->loginuid); } } // ses if (event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 10; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 11; *term = ' '; } } if (event_subject) { // scontext str = strstr(term, "subj="); if (str) { str += 5; term = strchr(str, ' '); if (term == NULL) return 12; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 13; } } if (event_comm) { str = strstr(term, "comm="); if (str) { str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 7; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } } if (event_filename) { str = strstr(term, " name="); if (str) { str += 6; if (common_path_parser(s, str)) return 8; } } // and results (usually last) if (event_success != S_UNSET) { str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 9; if (term) *term = ' '; } } return 0; } /* FIXME: If they are in permissive mode or hit an auditallow, there can * be more than 1 avc in the same syscall. For now, we pickup just the first. */ static int parse_avc(const lnode *n, search_items *s) { char *str, *term; anode an; int rc=0; term = n->message; anode_init(&an); // get the avc message info. str = strstr(term, "avc: "); if (str) { str += 5; term = strchr(str, '{'); if (term == NULL) { term = n->message; goto other_avc; } if (event_success != S_UNSET) { *term = 0; // FIXME. Do not override syscall success if already // set. Syscall pass/fail is the authoritative value. if (strstr(str, "denied")) { s->success = S_FAILED; an.avc_result = AVC_DENIED; } else { s->success = S_SUCCESS; an.avc_result = AVC_GRANTED; } *term = '{'; } // Now get permission str = term + 1; while (*str == ' ') str++; term = strchr(str, '}'); if (term == NULL) return 2; while (*(term-1) == ' ') term--; *term = 0; an.avc_perm = strdup(str); *term = ' '; } other_avc: // User AVC's are not formatted like a kernel AVC if (n->type == AUDIT_USER_AVC) { rc = parse_user(n, s, &an); if (rc > 20) rc = 0; if (audit_avc_init(s) == 0) { alist_append(s->avc, &an); } else { rc = 10; goto err; } return rc; } // get pid if (event_pid != -1) { str = strstr(term, "pid="); if (str) { str = str + 4; term = strchr(str, ' '); if (term == NULL) { rc = 3; goto err; } *term = 0; errno = 0; s->pid = strtoul(str, NULL, 10); if (errno) { rc = 4; goto err; } *term = ' '; } } if (event_comm && s->comm == NULL) { // dont do this search unless needed str = strstr(term, "comm="); if (str == NULL) { rc = 5; goto err; } str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) { rc = 6; goto err; } *term = 0; s->comm = strdup(str); *term = '"'; } else { s->comm = unescape(str); if (s->comm == NULL) { rc = 11; goto err; } term = str + 6; } } if (event_filename) { // do we have a path? str = strstr(term, " path="); if (str) { str += 6; rc = common_path_parser(s, str); if (rc) goto err; term += 7; } else { str = strstr(term, " name="); if (str) { str += 6; rc = common_path_parser(s, str); if (rc) goto err; term += 7; } } } if (event_subject) { // scontext str = strstr(term, "scontext="); if (str != NULL) { str += 9; term = strchr(str, ' '); if (term == NULL) { rc = 7; goto err; } *term = 0; an.scontext = strdup(str); *term = ' '; } } if (event_object) { // tcontext str = strstr(term, "tcontext="); if (str != NULL) { str += 9; term = strchr(str, ' '); if (term == NULL) { rc = 8; goto err; } *term = 0; an.tcontext = strdup(str); *term = ' '; } } // Now get the class...its at the end, so we do things different str = strstr(term, "tclass="); if (str == NULL) { rc = 9; goto err; } str += 7; term = strchr(str, ' '); if (term) *term = 0; an.avc_class = strdup(str); if (term) *term = ' '; if (audit_avc_init(s) == 0) { alist_append(s->avc, &an); } else { rc = 10; goto err; } return 0; err: anode_clear(&an); return rc; } static int parse_kernel_anom(const lnode *n, search_items *s) { char *str, *ptr, *term = n->message; // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(term, "auid="); if (str == NULL) return 1; ptr = str + 5; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 2; if (term) *term = ' '; else term = ptr; s->tauid = lookup_uid("auid", s->loginuid); } // optionally get uid if (event_uid != -1 || event_tuid) { str = strstr(term, "uid="); // if promiscuous, we start over if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 3; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 4; *term = ' '; s->tuid = lookup_uid("uid", s->uid); } } // optionally get gid if (event_gid != -1) { str = strstr(term, "gid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 5; *term = 0; errno = 0; s->gid = strtoul(ptr, NULL, 10); if (errno) return 6; *term = ' '; } } if (event_session_id != -2) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 7; if (term) *term = ' '; else term = ptr; } } if (n->type == AUDIT_ANOM_PROMISCUOUS) return 0; // Nothing else in the event if (event_subject) { // scontext str = strstr(term, "subj="); if (str) { str += 5; term = strchr(str, ' '); if (term == NULL) return 8; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 9; } } // get pid if (event_pid != -1) { str = strstr(term, "pid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 10; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 11; *term = ' '; } } if (event_comm) { // dont do this search unless needed str = strstr(term, "comm="); if (str) { str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 12; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } } if (event_exe) { // dont do this search unless needed str = strstr(term, "exe="); if (str) { str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 13; *term = 0; s->exe = strdup(str); *term = '"'; } else s->exe = unescape(str); } else if (n->type != AUDIT_ANOM_ABEND) return 14; } if (n->type == AUDIT_SECCOMP) { // get arch str = strstr(term, "arch="); if (str == NULL) return 0; // A few kernel versions don't have it ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 15; *term = 0; errno = 0; s->arch = (int)strtoul(ptr, NULL, 16); if (errno) return 16; *term = ' '; // get syscall str = strstr(term, "syscall="); if (str == NULL) return 17; ptr = str + 8; term = strchr(ptr, ' '); if (term == NULL) return 18; *term = 0; errno = 0; s->syscall = (int)strtoul(ptr, NULL, 10); if (errno) return 19; *term = ' '; } // optionally get res if (event_success != S_UNSET) { str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 68; if (term) *term = ' '; } } return 0; } // This is for messages that only have the loginuid as the item // of interest. static int parse_simple_message(const lnode *n, search_items *s) { char *str, *ptr, *term = n->message; // optionally get loginuid - old kernels skip auid for CONFIG_CHANGE if (event_loginuid != -2 || event_tauid) { str = strstr(term, "auid="); if (str == NULL && n->type != AUDIT_CONFIG_CHANGE) return 1; if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 2; if (term) *term = ' '; else term = ptr; s->tauid = lookup_uid("auid", s->loginuid); } } // ses if (event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 3; if (term) *term = ' '; else term = ptr; } } // Now get subj label if (event_subject) { // scontext str = strstr(term, "subj="); if (str != NULL) { str += 5; term = strchr(str, ' '); if (term) *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); if (term) *term = ' '; else // Set it back to something sane term = str; } else return 4; } } if (event_key) { str = strstr(term, "key="); if (str != NULL) { if (!s->key) { //create s->key = malloc(sizeof(slist)); if (s->key == NULL) return 5; slist_create(s->key); } ptr = str + 4; if (*ptr == '"') { ptr++; term = strchr(ptr, '"'); if (term != NULL) { *term = 0; if (s->key) { // append snode sn; sn.str = strdup(ptr); sn.key = NULL; sn.hits = 1; slist_append(s->key, &sn); } *term = '"'; } else return 6; } else { if (s->key) { char *saved; char *keyptr = unescape(ptr); if (keyptr == NULL) return 8; char *kptr = strtok_r(keyptr, key_sep, &saved); while (kptr) { snode sn; // append sn.str = strdup(kptr); sn.key = NULL; sn.hits = 1; slist_append(s->key, &sn); kptr = strtok_r(NULL, key_sep, &saved); } free(keyptr); } } } } // defaulting this to 1 for these messages. The kernel generally // does not log the res since it can be nothing but success. // But it can still be overriden below if res= is found in the event if (n->type == AUDIT_CONFIG_CHANGE) s->success = S_SUCCESS; // and results (usually last) if (event_success != S_UNSET) { str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 7; if (term) *term = ' '; } } return 0; } static int parse_tty(const lnode *n, search_items *s) { char *str, *ptr, *term=n->message; // get pid if (event_pid != -1) { str = strstr(n->message, "pid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 1; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 2; *term = ' '; } } // optionally get uid if (event_uid != -1 || event_tuid) { str = strstr(term, " uid="); // if promiscuous, we start over if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 3; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 4; *term = ' '; s->tuid = lookup_uid("uid", s->uid); } } // optionally get loginuid if (event_loginuid != -2 || event_tauid) { str = strstr(term, "auid="); if (str == NULL) return 5; ptr = str + 5; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 6; if (term) *term = ' '; else term = ptr; s->tauid = lookup_uid("auid", s->loginuid); } // ses if (event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 7; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 8; *term = ' '; } } /* if (event_subject) { // scontext str = strstr(term, "subj="); if (str) { str += 5; term = strchr(str, ' '); if (term == NULL) return 9; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 10; } } */ if (event_comm) { // dont do this search unless needed str = strstr(term, "comm="); if (str) { str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 11; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } } return 0; } static int parse_pkt(const lnode *n, search_items *s) { char *str, *ptr, *term=n->message; // get hostname if (event_hostname) { str = strstr(n->message, "saddr="); if (str) { ptr = str + 6; term = strchr(ptr, ' '); if (term == NULL) return 1; *term = 0; s->hostname = strdup(ptr); *term = ' '; } } // obj context if (event_object) { str = strstr(term, "obj="); if (str != NULL) { str += 4; term = strchr(str, ' '); if (term) *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.tcontext = strdup(str); alist_append(s->avc, &an); if (term) *term = ' '; } else return 2; } } return 0; } // parse Yet Another Audit Subject Attributes Order // /pid.*uid.*auid.*tty.*ses.*subj.*comm.*exe static int parse_kernel(lnode *n, search_items *s) { char *ptr, *str, *term; term = n->message; // get pid if not already filled if (event_pid != -1 && s->pid == -1) { str = strstr(term, " pid="); if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 52; *term = 0; errno = 0; s->pid = strtoul(ptr, NULL, 10); if (errno) return 53; *term = ' '; } else return 54; } // optionally get uid if not already filled if ((s->uid == -1 && !s->tuid) && (event_uid != -1 || event_tuid)) { str = strstr(term, "uid="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 55; *term = 0; errno = 0; s->uid = strtoul(ptr, NULL, 10); if (errno) return 56; *term = ' '; } else s->uid = 0; if (s->tuid) free((void *)s->tuid); s->tuid = lookup_uid("uid", s->uid); } // optionally get loginuid if not already filled if ((s->loginuid == -2 && !s->tauid) && (event_loginuid != -2 || event_tauid)) { str = strstr(term, "auid="); if (str) { ptr = str + 5; term = strchr(ptr, ' '); if (term == NULL) return 57; *term = 0; errno = 0; s->loginuid = strtoul(ptr, NULL, 10); if (errno) return 58; *term = ' '; } else s->loginuid = (uid_t)-1; if (s->tauid) free((void *)s->tauid); s->tauid = lookup_uid("auid", s->loginuid); } // optionally get tty if not already filled if (!s->terminal && event_terminal) { // dont do this search unless needed str = strstr(term, "tty="); if (str) { str += 4; term = strchr(str, ' '); if (term == NULL) return 59; *term = 0; if (s->terminal) // ANOM_NETLINK has one free(s->terminal); s->terminal = strdup(str); *term = ' '; } else s->terminal = strdup("(none)"); } // optionally get ses if not already filled if (s->session_id == -2 && event_session_id != -2 ) { str = strstr(term, "ses="); if (str) { ptr = str + 4; term = strchr(ptr, ' '); if (term == NULL) return 60; *term = 0; errno = 0; s->session_id = strtoul(ptr, NULL, 10); if (errno) return 61; *term = ' '; } else s->session_id = (uint32_t)-1; } // get subject if not already filled if (!s->avc && event_subject) { // scontext str = strstr(term, "subj="); if (str) { str += 5; term = strchr(str, ' '); if (term == NULL) return 62; *term = 0; if (audit_avc_init(s) == 0) { anode an; anode_init(&an); an.scontext = strdup(str); alist_append(s->avc, &an); *term = ' '; } else return 63; } else return 64; } // get command line if not already filled if (!s->comm && event_comm) { // dont do this search unless needed str = strstr(term, "comm="); if (str) { /* Make the syscall one override */ if (s->comm) { free(s->comm); s->comm = NULL; } str += 5; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 65; *term = 0; s->comm = strdup(str); *term = '"'; } else s->comm = unescape(str); } else return 66; } // optionally get exe if not already filled if (!s->exe && event_exe) { // dont do this search unless needed str = strstr(n->message, "exe="); if (str) { str += 4; if (*str == '"') { str++; term = strchr(str, '"'); if (term == NULL) return 67; *term = 0; s->exe = strdup(str); *term = '"'; } else s->exe = unescape(str); } else s->exe = strdup("(null)"); } // optionally get res if (event_success != S_UNSET) { str = strstr(term, "res="); if (str != NULL) { ptr = str + 4; term = strchr(ptr, ' '); if (term) *term = 0; errno = 0; s->success = strtoul(ptr, NULL, 10); if (errno) return 69; if (term) *term = ' '; } } return 0; }