/* Copyright (C) 2007-2010 Open Information Security Foundation * * You can copy, redistribute or modify this Program under the terms of * the GNU General Public License version 2 as published by the Free * Software Foundation. * * 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 * version 2 along with this program; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301, USA. */ /** * \file * * \author Anoop Saldanha * * Implements dce_iface keyword. */ #include "suricata-common.h" #include "detect.h" #include "detect-parse.h" #include "detect-engine.h" #include "detect-engine-mpm.h" #include "detect-engine-state.h" #include "detect-dce-iface.h" #include "flow.h" #include "flow-var.h" #include "flow-util.h" #include "app-layer.h" #include "app-layer-dcerpc.h" #include "queue.h" #include "stream-tcp-reassemble.h" #include "util-debug.h" #include "util-unittest.h" #include "util-unittest-helper.h" #include "stream-tcp.h" #define DETECT_DCE_IFACE_PCRE_PARSE_ARGS "^\\s*([0-9a-zA-Z]{8}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{4}-[0-9a-zA-Z]{12})(?:\\s*,(<|>|=|!)([0-9]{1,5}))?(?:\\s*,(any_frag))?\\s*$" static pcre *parse_regex = NULL; static pcre_extra *parse_regex_study = NULL; int DetectDceIfaceMatch(ThreadVars *, DetectEngineThreadCtx *, Flow *, uint8_t, void *, Signature *, SigMatch *); static int DetectDceIfaceSetup(DetectEngineCtx *, Signature *, char *); void DetectDceIfaceFree(void *); /** * \brief Registers the keyword handlers for the "dce_iface" keyword. */ void DetectDceIfaceRegister(void) { const char *eb; int eo; int opts = 0; sigmatch_table[DETECT_DCE_IFACE].name = "dce_iface"; sigmatch_table[DETECT_DCE_IFACE].alproto = ALPROTO_DCERPC; sigmatch_table[DETECT_DCE_IFACE].Match = NULL; sigmatch_table[DETECT_DCE_IFACE].AppLayerMatch = DetectDceIfaceMatch; sigmatch_table[DETECT_DCE_IFACE].Setup = DetectDceIfaceSetup; sigmatch_table[DETECT_DCE_IFACE].Free = DetectDceIfaceFree; sigmatch_table[DETECT_DCE_IFACE].RegisterTests = DetectDceIfaceRegisterTests; sigmatch_table[DETECT_DCE_IFACE].flags |= SIGMATCH_PAYLOAD; parse_regex = pcre_compile(DETECT_DCE_IFACE_PCRE_PARSE_ARGS, opts, &eb, &eo, NULL); if (parse_regex == NULL) { SCLogDebug("pcre compile of \"%s\" failed at offset %" PRId32 ": %s", DETECT_DCE_IFACE_PCRE_PARSE_ARGS, eo, eb); goto error; } parse_regex_study = pcre_study(parse_regex, 0, &eb); if (eb != NULL) { SCLogDebug("pcre study failed: %s", eb); goto error; } return; error: /* we need to handle error?! */ return; } /** * \internal * \brief Parses the argument sent along with the "dce_iface" keyword. * * \param arg Pointer to the string containing the argument to be parsed. * * \retval did Pointer to a DetectDceIfaceData instance that holds the data * from the parsed arg. */ static inline DetectDceIfaceData *DetectDceIfaceArgParse(const char *arg) { DetectDceIfaceData *did = NULL; #define MAX_SUBSTRINGS 30 int ret = 0, res = 0; int ov[MAX_SUBSTRINGS]; uint8_t hex_value; char copy_str[128] = ""; int i = 0, j = 0; int len = 0; char temp_str[3] = ""; int version; ret = pcre_exec(parse_regex, parse_regex_study, arg, strlen(arg), 0, 0, ov, MAX_SUBSTRINGS); if (ret < 2) { SCLogError(SC_ERR_PCRE_MATCH, "pcre_exec parse error, ret %" PRId32 ", string %s", ret, arg); goto error; } if ( (did = SCMalloc(sizeof(DetectDceIfaceData))) == NULL) goto error; memset(did, 0, sizeof(DetectDceIfaceData)); /* retrieve the iface uuid string. iface uuid is a compulsion in the keyword */ res = pcre_copy_substring(arg, ov, MAX_SUBSTRINGS, 1, copy_str, sizeof(copy_str)); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed"); goto error; } /* parse the iface uuid string */ len = strlen(copy_str); j = 0; temp_str[2] = '\0'; for (i = 0; i < len; ) { if (copy_str[i] == '-') { i++; continue; } temp_str[0] = copy_str[i]; temp_str[1] = copy_str[i + 1]; hex_value = strtol(temp_str, NULL, 16); did->uuid[j] = hex_value; i += 2; j++; } /* if the regex has 3 or 5, any_frag option is present in the signature */ if (ret == 3 || ret == 5) did->any_frag = 1; /* if the regex has 4 or 5, version/operator is present in the signature */ if (ret == 4 || ret == 5) { /* first handle the version number, so that we can do some additional * validations of the version number, wrt. the operator */ res = pcre_copy_substring(arg, ov, MAX_SUBSTRINGS, 3, copy_str, sizeof(copy_str)); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed"); goto error; } version = atoi(copy_str); if (version > UINT16_MAX) { SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface version " "invalid: %d\n", version); goto error; } did->version = version; /* now let us handle the operator supplied with the version number */ res = pcre_copy_substring(arg, ov, MAX_SUBSTRINGS, 2, copy_str, sizeof(copy_str)); if (res < 0) { SCLogError(SC_ERR_PCRE_GET_SUBSTRING, "pcre_copy_substring failed"); goto error; } switch (copy_str[0]) { case '<': if (version == 0) { SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface " "version invalid: %d. Version can't be less" "than 0, with \"<\" operator", version); goto error; } did->op = DETECT_DCE_IFACE_OP_LT; break; case '>': if (version == UINT16_MAX) { SCLogError(SC_ERR_INVALID_SIGNATURE, "DCE_IFACE interface " "version invalid: %d. Version can't be greater" "than %d, with \">\" operator", version, UINT16_MAX); goto error; } did->op = DETECT_DCE_IFACE_OP_GT; break; case '=': did->op = DETECT_DCE_IFACE_OP_EQ; break; case '!': did->op = DETECT_DCE_IFACE_OP_NE; break; } } return did; error: if (did != NULL) SCFree(did); return NULL; } /** * \internal * \brief Internal function that compares the dce interface version for this * flow, to the signature's interface version specified using the * dce_iface keyword. * * \param version The dce interface version for this flow. * \param dce_data Pointer to the Signature's dce_iface keyword * state(DetectDceIfaceData *). */ static inline int DetectDceIfaceMatchIfaceVersion(uint16_t version, DetectDceIfaceData *dce_data) { switch (dce_data->op) { case DETECT_DCE_IFACE_OP_LT: return (version < dce_data->version); case DETECT_DCE_IFACE_OP_GT: return (version > dce_data->version); case DETECT_DCE_IFACE_OP_EQ: return (version == dce_data->version); case DETECT_DCE_IFACE_OP_NE: return (version != dce_data->version); default: return 1; } } /** * \brief App layer match function for the "dce_iface" keyword. * * \param t Pointer to the ThreadVars instance. * \param det_ctx Pointer to the DetectEngineThreadCtx. * \param f Pointer to the flow. * \param flags Pointer to the flags indicating the flow direction. * \param state Pointer to the app layer state data. * \param s Pointer to the Signature instance. * \param m Pointer to the SigMatch. * * \retval 1 On Match. * \retval 0 On no match. */ int DetectDceIfaceMatch(ThreadVars *t, DetectEngineThreadCtx *det_ctx, Flow *f, uint8_t flags, void *state, Signature *s, SigMatch *m) { SCEnter(); int ret = 0; DCERPCUuidEntry *item = NULL; int i = 0; DetectDceIfaceData *dce_data = (DetectDceIfaceData *)m->ctx; DCERPCState *dcerpc_state = (DCERPCState *)state; if (dcerpc_state == NULL) { SCLogDebug("No DCERPCState for the flow"); SCReturnInt(0); } /* we still haven't seen a request */ if (!dcerpc_state->dcerpc.dcerpcrequest.first_request_seen) goto end; if (!(dcerpc_state->dcerpc.dcerpchdr.type == REQUEST)) goto end; TAILQ_FOREACH(item, &dcerpc_state->dcerpc.dcerpcbindbindack.accepted_uuid_list, next) { SCLogDebug("item %p", item); ret = 1; /* if any_frag is not enabled, we need to match only against the first * fragment */ if (!dce_data->any_frag && !(item->flags & DCERPC_UUID_ENTRY_FLAG_FF)) continue; /* if the uuid has been rejected(item->result == 1), we skip to the * next uuid */ if (item->result != 0) continue; /* check the interface uuid */ for (i = 0; i < 16; i++) { if (dce_data->uuid[i] != item->uuid[i]) { ret = 0; break; } } ret &= (item->ctxid == dcerpc_state->dcerpc.dcerpcrequest.ctxid); if (ret == 0) continue; /* check the interface version */ if (dce_data->op != DETECT_DCE_IFACE_OP_NONE && !DetectDceIfaceMatchIfaceVersion(item->version, dce_data)) { ret &= 0; } /* we have a match. Time to leave with a match */ if (ret == 1) goto end; } end: SCReturnInt(ret); } /** * \brief Creates a SigMatch for the "dce_iface" keyword being sent as argument, * and appends it to the Signature(s). * * \param de_ctx Pointer to the detection engine context. * \param s Pointer to signature for the current Signature being parsed * from the rules. * \param arg Pointer to the string holding the keyword value. * * \retval 0 on success, -1 on failure. */ static int DetectDceIfaceSetup(DetectEngineCtx *de_ctx, Signature *s, char *arg) { DetectDceIfaceData *did = NULL; SigMatch *sm = NULL; did = DetectDceIfaceArgParse(arg); if (did == NULL) { SCLogError(SC_ERR_INVALID_SIGNATURE, "Error parsing dec_iface option in " "signature"); goto error; } sm = SigMatchAlloc(); if (sm == NULL) goto error; sm->type = DETECT_DCE_IFACE; sm->ctx = (void *)did; SigMatchAppendSMToList(s, sm, DETECT_SM_LIST_AMATCH); if (s->alproto != ALPROTO_UNKNOWN && s->alproto != ALPROTO_DCERPC) { SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS, "rule contains conflicting keywords."); goto error; } s->alproto = ALPROTO_DCERPC; /* Flagged the signature as to inspect the app layer data */ s->flags |= SIG_FLAG_APPLAYER; return 0; error: DetectDceIfaceFree(did); if (sm != NULL) SCFree(sm); return -1; } void DetectDceIfaceFree(void *ptr) { SCFree(ptr); return; } /************************************Unittests*********************************/ #ifdef UNITTESTS static int DetectDceIfaceTestParse01(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 0); result &= (did->op == 0); result &= (did->any_frag == 0); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse02(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>1") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 1); result &= (did->op == DETECT_DCE_IFACE_OP_GT); result &= (did->any_frag == 0); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse03(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,<10") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 10); result &= (did->op == DETECT_DCE_IFACE_OP_LT); result &= (did->any_frag == 0); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse04(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,!10") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 10); result &= (did->op == DETECT_DCE_IFACE_OP_NE); result &= (did->any_frag == 0); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse05(void) { SCEnter(); Signature *s = SigAlloc(); int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,=10") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 10); result &= (did->op == DETECT_DCE_IFACE_OP_EQ); result &= (did->any_frag == 0); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse06(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,any_frag") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 0); result &= (did->op == 0); result &= (did->any_frag == 1); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse07(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>1,any_frag") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 1); result &= (did->op == DETECT_DCE_IFACE_OP_GT); result &= (did->any_frag == 1); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse08(void) { Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,<1,any_frag") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 1); result &= (did->op == DETECT_DCE_IFACE_OP_LT); result &= (did->any_frag == 1); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse09(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,=1,any_frag") == 0); temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 1); result &= (did->op == DETECT_DCE_IFACE_OP_EQ); result &= (did->any_frag == 1); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse10(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 0; DetectDceIfaceData *did = NULL; uint8_t test_uuid[] = {0x12, 0x34, 0x56, 0x78, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x12, 0x34, 0x56, 0x78, 0x9A, 0xBC}; SigMatch *temp = NULL; int i = 0; result = (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,!1,any_frag") == 0); if (s->sm_lists[DETECT_SM_LIST_AMATCH] == NULL) { SCReturnInt(0); } temp = s->sm_lists[DETECT_SM_LIST_AMATCH]; did = (DetectDceIfaceData *)temp->ctx; if (did == NULL) { SCReturnInt(0); } result &= 1; for (i = 0; i < 16; i++) { if (did->uuid[i] != test_uuid[i]) { result = 0; break; } } result &= (did->version == 1); result &= (did->op == DETECT_DCE_IFACE_OP_NE); result &= (did->any_frag == 1); SigFree(s); SCReturnInt(result); } static int DetectDceIfaceTestParse11(void) { SCEnter(); Signature *s = SigAlloc(); if (s == NULL) return 0; int result = 1; result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>1,ay_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-12345679ABC,>1,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-134-123456789ABC,>1,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-123-124-1234-123456789ABC,>1,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "1234568-1234-1234-1234-123456789ABC,>1,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>65536,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>=1,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,<0,any_frag") == -1); result &= (DetectDceIfaceSetup(NULL, s, "12345678-1234-1234-1234-123456789ABC,>65535,any_frag") == -1); SigFree(s); return result; } /** * \test Test a valid dce_iface entry for a bind and bind_ack */ static int DetectDceIfaceTestParse12(void) { int result = 0; Signature *s = NULL; ThreadVars th_v; Packet *p = NULL; Flow f; TcpSession ssn; DetectEngineThreadCtx *det_ctx = NULL; DetectEngineCtx *de_ctx = NULL; DCERPCState *dcerpc_state = NULL; int r = 0; uint8_t dcerpc_bind[] = { 0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x6a, 0x28, 0x19, 0x39, 0x0c, 0xb1, 0xd0, 0x11, 0x9b, 0xa8, 0x00, 0xc0, 0x4f, 0xd9, 0x2e, 0xf5, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00, }; uint8_t dcerpc_bindack[] = { 0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x26, 0x3d, 0x00, 0x00, 0x0c, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c, 0x6c, 0x73, 0x61, 0x73, 0x73, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint8_t dcerpc_request[] = { 0x05, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0xad, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; uint32_t dcerpc_bind_len = sizeof(dcerpc_bind); uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack); uint32_t dcerpc_request_len = sizeof(dcerpc_request); AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc(); memset(&th_v, 0, sizeof(th_v)); memset(&f, 0, sizeof(f)); memset(&ssn, 0, sizeof(ssn)); p = UTHBuildPacket(NULL, 0, IPPROTO_TCP); FLOW_INITIALIZE(&f); f.protoctx = (void *)&ssn; f.proto = IPPROTO_TCP; p->flow = &f; p->flowflags |= FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_ESTABLISHED; p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST; f.alproto = ALPROTO_DCERPC; StreamTcpInitConfig(TRUE); de_ctx = DetectEngineCtxInit(); if (de_ctx == NULL) goto end; de_ctx->flags |= DE_QUIET; s = DetectEngineAppendSig(de_ctx,"alert tcp any any -> any any " "(msg:\"DCERPC\"; " "dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5,=0,any_frag; " "sid:1;)"); if (s == NULL) goto end; SigGroupBuild(de_ctx); DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx); SCLogDebug("handling to_server chunk"); SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START, dcerpc_bind, dcerpc_bind_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); dcerpc_state = f.alstate; if (dcerpc_state == NULL) { SCLogDebug("no dcerpc state: "); goto end; } /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sid 1 didn't match (1): "); goto end; } SCLogDebug("handling to_client chunk"); SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack, dcerpc_bindack_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sid 1 matched, but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_request, dcerpc_request_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!PacketAlertCheck(p, 1)) { printf("sid 1 matched, but shouldn't have: "); goto end; } result = 1; end: if (alp_tctx != NULL) AppLayerParserThreadCtxFree(alp_tctx); SigGroupCleanup(de_ctx); SigCleanSignatures(de_ctx); DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(TRUE); FLOW_DESTROY(&f); UTHFreePackets(&p, 1); return result; } /* Disabled because of bug_753. Would be enabled, once we rewrite * dce parser */ #if 0 /** * \test Test a valid dce_iface entry with a bind, bind_ack and 3 request/responses. */ static int DetectDceIfaceTestParse13(void) { int result = 0; Signature *s = NULL; ThreadVars th_v; Packet *p = NULL; Flow f; TcpSession ssn; DetectEngineThreadCtx *det_ctx = NULL; DetectEngineCtx *de_ctx = NULL; DCERPCState *dcerpc_state = NULL; int r = 0; uint8_t dcerpc_bind[] = { 0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0xd0, 0x8c, 0x33, 0x44, 0x22, 0xf1, 0x31, 0xaa, 0xaa, 0x90, 0x00, 0x38, 0x00, 0x10, 0x03, 0x01, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00, }; uint8_t dcerpc_bindack[] = { 0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x65, 0x8e, 0x00, 0x00, 0x0d, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c, 0x77, 0x69, 0x6e, 0x72, 0x65, 0x67, 0x00, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00, }; uint8_t dcerpc_request1[] = { 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x24, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x02, 0x00, 0x2c, 0xfd, 0xb5, 0x00, 0x40, 0xaa, 0x01, 0x00, 0x00, 0x00, 0x00, 0x02, }; uint8_t dcerpc_response1[] = { 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf6, 0x72, 0x28, 0x9c, 0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c, 0x29, 0x87, 0xea, 0xe9, 0x00, 0x00, 0x00, 0x00, }; uint8_t dcerpc_request2[] = { 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x8c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x0f, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf6, 0x72, 0x28, 0x9c, 0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c, 0x29, 0x87, 0xea, 0xe9, 0x5c, 0x00, 0x5c, 0x00, 0xa8, 0xb9, 0x14, 0x00, 0x2e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x2e, 0x00, 0x00, 0x00, 0x53, 0x00, 0x4f, 0x00, 0x46, 0x00, 0x54, 0x00, 0x57, 0x00, 0x41, 0x00, 0x52, 0x00, 0x45, 0x00, 0x5c, 0x00, 0x4d, 0x00, 0x69, 0x00, 0x63, 0x00, 0x72, 0x00, 0x6f, 0x00, 0x73, 0x00, 0x6f, 0x00, 0x66, 0x00, 0x74, 0x00, 0x5c, 0x00, 0x57, 0x00, 0x69, 0x00, 0x6e, 0x00, 0x64, 0x00, 0x6f, 0x00, 0x77, 0x00, 0x73, 0x00, 0x5c, 0x00, 0x43, 0x00, 0x75, 0x00, 0x72, 0x00, 0x72, 0x00, 0x65, 0x00, 0x6e, 0x00, 0x74, 0x00, 0x56, 0x00, 0x65, 0x00, 0x72, 0x00, 0x73, 0x00, 0x69, 0x00, 0x6f, 0x00, 0x6e, 0x00, 0x5c, 0x00, 0x52, 0x00, 0x75, 0x00, 0x6e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, }; uint8_t dcerpc_response2[] = { 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x02, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf7, 0x72, 0x28, 0x9c, 0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c, 0x29, 0x87, 0xea, 0xe9, 0x00, 0x00, 0x00, 0x00, }; uint8_t dcerpc_request3[] = { 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x70, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x58, 0x00, 0x00, 0x00, 0x00, 0x00, 0x16, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf7, 0x72, 0x28, 0x9c, 0xf0, 0x57, 0xd8, 0x11, 0xb0, 0x05, 0x00, 0x0c, 0x29, 0x87, 0xea, 0xe9, 0x0c, 0x00, 0x0c, 0x00, 0x98, 0xda, 0x14, 0x00, 0x06, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x06, 0x00, 0x00, 0x00, 0x4f, 0x00, 0x73, 0x00, 0x61, 0x00, 0x33, 0x00, 0x32, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x4e, 0x00, 0x54, 0x00, 0x4f, 0x00, 0x53, 0x00, 0x41, 0x00, 0x33, 0x00, 0x32, 0x00, 0x2e, 0x00, 0x45, 0x00, 0x58, 0x00, 0x45, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, }; uint8_t dcerpc_response3[] = { 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00, 0x1c, 0x00, 0x00, 0x00, 0x03, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; uint32_t dcerpc_bind_len = sizeof(dcerpc_bind); uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack); uint32_t dcerpc_request1_len = sizeof(dcerpc_request1); uint32_t dcerpc_response1_len = sizeof(dcerpc_response1); uint32_t dcerpc_request2_len = sizeof(dcerpc_request2); uint32_t dcerpc_response2_len = sizeof(dcerpc_response2); uint32_t dcerpc_request3_len = sizeof(dcerpc_request3); uint32_t dcerpc_response3_len = sizeof(dcerpc_response3); AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc(); memset(&th_v, 0, sizeof(th_v)); memset(&p, 0, sizeof(p)); memset(&f, 0, sizeof(f)); memset(&ssn, 0, sizeof(ssn)); p = UTHBuildPacket(NULL, 0, IPPROTO_TCP); FLOW_INITIALIZE(&f); f.protoctx = (void *)&ssn; f.proto = IPPROTO_TCP; p->flow = &f; p->flowflags |= FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_ESTABLISHED; p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST; f.alproto = ALPROTO_DCERPC; StreamTcpInitConfig(TRUE); de_ctx = DetectEngineCtxInit(); if (de_ctx == NULL) goto end; de_ctx->flags |= DE_QUIET; s = DetectEngineAppendSig(de_ctx,"alert tcp any any -> any any " "(msg:\"DCERPC\"; dce_iface:338cd001-2244-31f1-aaaa-900038001003,=1,any_frag; sid:1;)"); if (s == NULL) goto end; SigGroupBuild(de_ctx); DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx); SCLogDebug("chunk 1, bind"); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START, dcerpc_bind, dcerpc_bind_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } dcerpc_state = f.alstate; if (dcerpc_state == NULL) { SCLogDebug("no dcerpc state: "); goto end; } p->flowflags &=~ FLOW_PKT_TOCLIENT; p->flowflags |= FLOW_PKT_TOSERVER; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 didn't match after bind request: "); goto end; } SCLogDebug("chunk 2, bind_ack"); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack, dcerpc_bindack_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_TOCLIENT; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched again after bind ack: "); goto end; } SCLogDebug("chunk 3, request 1"); /* request1 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1, dcerpc_request1_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOCLIENT; p->flowflags |= FLOW_PKT_TOSERVER; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!(PacketAlertCheck(p, 1))) { printf("sig 1 didn't match after request1: "); goto end; } SCLogDebug("sending response1"); /* response1 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1, dcerpc_response1_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_TOCLIENT; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched after response1, but shouldn't: "); goto end; } SCLogDebug("sending request2"); /* request2 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2, dcerpc_request2_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOCLIENT; p->flowflags |= FLOW_PKT_TOSERVER; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!(PacketAlertCheck(p, 1))) { printf("sig 1 didn't match after request2: "); goto end; } /* response2 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response2, dcerpc_response2_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_TOCLIENT; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched after response2, but shouldn't have: "); goto end; } /* request3 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request3, dcerpc_request3_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOCLIENT; p->flowflags |= FLOW_PKT_TOSERVER; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!(PacketAlertCheck(p, 1))) { printf("sig 1 didn't match after request3: "); goto end; } /* response3 */ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT | STREAM_EOF, dcerpc_response3, dcerpc_response3_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); goto end; } p->flowflags &=~ FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_TOCLIENT; /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched after response3, but shouldn't have: "); goto end; } result = 1; end: if (alp_tctx != NULL) AppLayerParserThreadCtxFree(alp_tctx); SigGroupCleanup(de_ctx); SigCleanSignatures(de_ctx); DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(TRUE); UTHFreePackets(&p, 1); return result; } #endif /** * \test Test a valid dce_iface entry for a bind and bind_ack */ static int DetectDceIfaceTestParse14(void) { int result = 0; Signature *s = NULL; ThreadVars th_v; Packet *p = NULL; Flow f; TcpSession ssn; DetectEngineThreadCtx *det_ctx = NULL; DetectEngineCtx *de_ctx = NULL; DCERPCState *dcerpc_state = NULL; int r = 0; uint8_t dcerpc_bind[] = { 0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x6a, 0x28, 0x19, 0x39, 0x0c, 0xb1, 0xd0, 0x11, 0x9b, 0xa8, 0x00, 0xc0, 0x4f, 0xd9, 0x2e, 0xf5, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00, }; uint8_t dcerpc_bindack[] = { 0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x26, 0x3d, 0x00, 0x00, 0x0c, 0x00, 0x5c, 0x50, 0x49, 0x50, 0x45, 0x5c, 0x6c, 0x73, 0x61, 0x73, 0x73, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint8_t dcerpc_request[] = { 0x05, 0x00, 0x00, 0x01, 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0xad, 0x0d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; uint32_t dcerpc_bind_len = sizeof(dcerpc_bind); uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack); uint32_t dcerpc_request_len = sizeof(dcerpc_request); AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc(); memset(&th_v, 0, sizeof(th_v)); memset(&p, 0, sizeof(p)); memset(&f, 0, sizeof(f)); memset(&ssn, 0, sizeof(ssn)); p = UTHBuildPacket(NULL, 0, IPPROTO_TCP); FLOW_INITIALIZE(&f); f.protoctx = (void *)&ssn; f.proto = IPPROTO_TCP; p->flow = &f; p->flowflags |= FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_ESTABLISHED; p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST; f.alproto = ALPROTO_DCERPC; StreamTcpInitConfig(TRUE); de_ctx = DetectEngineCtxInit(); if (de_ctx == NULL) goto end; de_ctx->flags |= DE_QUIET; s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"DCERPC\"; " "dce_iface:3919286a-b10c-11d0-9ba8-00c04fd92ef5,=0; " "sid:1;)"); if (s == NULL) goto end; SigGroupBuild(de_ctx); DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx); SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START, dcerpc_bind, dcerpc_bind_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); dcerpc_state = f.alstate; if (dcerpc_state == NULL) { SCLogDebug("no dcerpc state: "); goto end; } /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) goto end; SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack, dcerpc_bindack_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_request, dcerpc_request_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } result = 1; end: if (alp_tctx != NULL) AppLayerParserThreadCtxFree(alp_tctx); SigGroupCleanup(de_ctx); SigCleanSignatures(de_ctx); DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(TRUE); FLOW_DESTROY(&f); UTHFreePackets(&p, 1); return result; } /** * \test Test a valid dce_iface entry for a bind and bind_ack */ static int DetectDceIfaceTestParse15(void) { int result = 0; Signature *s = NULL; ThreadVars th_v; Packet *p = NULL; Flow f; TcpSession ssn; DetectEngineThreadCtx *det_ctx = NULL; DetectEngineCtx *de_ctx = NULL; DCERPCState *dcerpc_state = NULL; int r = 0; uint8_t dcerpc_bind[] = { 0x05, 0x00, 0x0b, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xd0, 0x16, 0xd0, 0x16, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x40, 0xfd, 0x2c, 0x34, 0x6c, 0x3c, 0xce, 0x11, 0xa8, 0x93, 0x08, 0x00, 0x2b, 0x2e, 0x9c, 0x6d, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint32_t dcerpc_bind_len = sizeof(dcerpc_bind); uint8_t dcerpc_bindack[] = { 0x05, 0x00, 0x0c, 0x03, 0x10, 0x00, 0x00, 0x00, 0x44, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x7d, 0xd8, 0x00, 0x00, 0x0d, 0x00, 0x5c, 0x70, 0x69, 0x70, 0x65, 0x5c, 0x6c, 0x6c, 0x73, 0x72, 0x70, 0x63, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint32_t dcerpc_bindack_len = sizeof(dcerpc_bindack); uint8_t dcerpc_alter_context[] = { 0x05, 0x00, 0x0e, 0x03, 0x10, 0x00, 0x00, 0x00, 0x48, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xd0, 0x16, 0xd0, 0x16, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x01, 0x00, 0x01, 0x00, 0xd0, 0x4c, 0x67, 0x57, 0x00, 0x52, 0xce, 0x11, 0xa8, 0x97, 0x08, 0x00, 0x2b, 0x2e, 0x9c, 0x6d, 0x01, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint32_t dcerpc_alter_context_len = sizeof(dcerpc_alter_context); uint8_t dcerpc_alter_context_resp[] = { 0x05, 0x00, 0x0f, 0x03, 0x10, 0x00, 0x00, 0x00, 0x38, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xb8, 0x10, 0xb8, 0x10, 0x7d, 0xd8, 0x00, 0x00, 0x00, 0x00, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x5d, 0x88, 0x8a, 0xeb, 0x1c, 0xc9, 0x11, 0x9f, 0xe8, 0x08, 0x00, 0x2b, 0x10, 0x48, 0x60, 0x02, 0x00, 0x00, 0x00 }; uint32_t dcerpc_alter_context_resp_len = sizeof(dcerpc_alter_context_resp); uint8_t dcerpc_request1[] = { 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x20, 0x03, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xdd, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, }; uint32_t dcerpc_request1_len = sizeof(dcerpc_request1); uint8_t dcerpc_response1[] = { 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00, 0x30, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x18, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf5, 0x66, 0xbf, 0x54, 0xc4, 0xdb, 0xdb, 0x4f, 0xa0, 0x01, 0x6d, 0xf4, 0xf6, 0xa8, 0x44, 0xb3, 0x00, 0x00, 0x00, 0x00 }; uint32_t dcerpc_response1_len = sizeof(dcerpc_response1); uint8_t dcerpc_request2[] = { 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00, 0x20, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0xc6, 0x00, 0x00, 0x00, 0x00, 0x00, 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x07, 0x9f, 0x13, 0xd9, }; uint32_t dcerpc_request2_len = sizeof(dcerpc_request2); AppLayerParserThreadCtx *alp_tctx = AppLayerParserThreadCtxAlloc(); memset(&th_v, 0, sizeof(th_v)); memset(&p, 0, sizeof(p)); memset(&f, 0, sizeof(f)); memset(&ssn, 0, sizeof(ssn)); p = UTHBuildPacket(NULL, 0, IPPROTO_TCP); FLOW_INITIALIZE(&f); f.protoctx = (void *)&ssn; f.proto = IPPROTO_TCP; p->flow = &f; p->flags |= PKT_HAS_FLOW|PKT_STREAM_EST; p->flowflags |= FLOW_PKT_TOSERVER; p->flowflags |= FLOW_PKT_ESTABLISHED; f.alproto = ALPROTO_DCERPC; StreamTcpInitConfig(TRUE); de_ctx = DetectEngineCtxInit(); if (de_ctx == NULL) goto end; de_ctx->flags |= DE_QUIET; s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"DCERPC\"; " "dce_iface:57674cd0-5200-11ce-a897-08002b2e9c6d; " "sid:1;)"); if (s == NULL) goto end; s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any " "(msg:\"DCERPC\"; " "dce_iface:342cfd40-3c6c-11ce-a893-08002b2e9c6d; " "sid:2;)"); if (s == NULL) goto end; SigGroupBuild(de_ctx); DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx); SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START, dcerpc_bind, dcerpc_bind_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); dcerpc_state = f.alstate; if (dcerpc_state == NULL) { SCLogDebug("no dcerpc state: "); goto end; } /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) goto end; if (PacketAlertCheck(p, 2)) goto end; SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack, dcerpc_bindack_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_alter_context, dcerpc_alter_context_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_alter_context_resp, dcerpc_alter_context_resp_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1, dcerpc_request1_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (!PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1, dcerpc_response1_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } SCMutexLock(&f.m); r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2, dcerpc_request2_len); if (r != 0) { SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r); SCMutexUnlock(&f.m); goto end; } SCMutexUnlock(&f.m); /* do detect */ SigMatchSignatures(&th_v, de_ctx, det_ctx, p); if (PacketAlertCheck(p, 1)) { printf("sig 1 matched but shouldn't have: "); goto end; } if (!PacketAlertCheck(p, 2)) { printf("sig 1 matched but shouldn't have: "); goto end; } result = 1; end: if (alp_tctx != NULL) AppLayerParserThreadCtxFree(alp_tctx); SigGroupCleanup(de_ctx); SigCleanSignatures(de_ctx); DetectEngineThreadCtxDeinit(&th_v, (void *)det_ctx); DetectEngineCtxFree(de_ctx); StreamTcpFreeConfig(TRUE); FLOW_DESTROY(&f); UTHFreePackets(&p, 1); return result; } #endif void DetectDceIfaceRegisterTests(void) { #ifdef UNITTESTS UtRegisterTest("DetectDceIfaceTestParse01", DetectDceIfaceTestParse01, 1); UtRegisterTest("DetectDceIfaceTestParse02", DetectDceIfaceTestParse02, 1); UtRegisterTest("DetectDceIfaceTestParse03", DetectDceIfaceTestParse03, 1); UtRegisterTest("DetectDceIfaceTestParse04", DetectDceIfaceTestParse04, 1); UtRegisterTest("DetectDceIfaceTestParse05", DetectDceIfaceTestParse05, 1); UtRegisterTest("DetectDceIfaceTestParse06", DetectDceIfaceTestParse06, 1); UtRegisterTest("DetectDceIfaceTestParse07", DetectDceIfaceTestParse07, 1); UtRegisterTest("DetectDceIfaceTestParse08", DetectDceIfaceTestParse08, 1); UtRegisterTest("DetectDceIfaceTestParse09", DetectDceIfaceTestParse09, 1); UtRegisterTest("DetectDceIfaceTestParse10", DetectDceIfaceTestParse10, 1); UtRegisterTest("DetectDceIfaceTestParse11", DetectDceIfaceTestParse11, 1); UtRegisterTest("DetectDceIfaceTestParse12", DetectDceIfaceTestParse12, 1); /* Disabled because of bug_753. Would be enabled, once we rewrite * dce parser */ #if 0 UtRegisterTest("DetectDceIfaceTestParse13", DetectDceIfaceTestParse13, 1); #endif UtRegisterTest("DetectDceIfaceTestParse14", DetectDceIfaceTestParse14, 1); UtRegisterTest("DetectDceIfaceTestParse15", DetectDceIfaceTestParse15, 1); #endif return; }