summaryrefslogtreecommitdiffstats
path: root/src/detect-dce-opnum.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/detect-dce-opnum.c')
-rw-r--r--src/detect-dce-opnum.c1341
1 files changed, 1341 insertions, 0 deletions
diff --git a/src/detect-dce-opnum.c b/src/detect-dce-opnum.c
new file mode 100644
index 0000000..d10b175
--- /dev/null
+++ b/src/detect-dce-opnum.c
@@ -0,0 +1,1341 @@
+/* Copyright (C) 2007-2022 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 <anoopsaldanha@gmail.com>
+ *
+ * Implements dce_opnum 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-engine-build.h"
+
+#include "flow.h"
+#include "flow-var.h"
+#include "flow-util.h"
+
+#include "app-layer.h"
+#include "queue.h"
+#include "stream-tcp-reassemble.h"
+#include "detect-dce-opnum.h"
+#include "detect-dce-iface.h"
+
+#include "util-debug.h"
+#include "util-unittest.h"
+#include "util-unittest-helper.h"
+#include "stream-tcp.h"
+
+#include "rust.h"
+
+#define PARSE_REGEX "^\\s*([0-9]{1,5}(\\s*-\\s*[0-9]{1,5}\\s*)?)(,\\s*[0-9]{1,5}(\\s*-\\s*[0-9]{1,5})?\\s*)*$"
+
+static DetectParseRegex parse_regex;
+
+static int DetectDceOpnumMatchRust(DetectEngineThreadCtx *det_ctx,
+ Flow *f, uint8_t flags, void *state, void *txv,
+ const Signature *s, const SigMatchCtx *m);
+static int DetectDceOpnumSetup(DetectEngineCtx *, Signature *, const char *);
+static void DetectDceOpnumFree(DetectEngineCtx *, void *);
+#ifdef UNITTESTS
+static void DetectDceOpnumRegisterTests(void);
+#endif
+static int g_dce_generic_list_id = 0;
+
+/**
+ * \brief Registers the keyword handlers for the "dce_opnum" keyword.
+ */
+void DetectDceOpnumRegister(void)
+{
+ sigmatch_table[DETECT_DCE_OPNUM].name = "dcerpc.opnum";
+ sigmatch_table[DETECT_DCE_OPNUM].alias = "dce_opnum";
+ sigmatch_table[DETECT_DCE_OPNUM].AppLayerTxMatch = DetectDceOpnumMatchRust;
+ sigmatch_table[DETECT_DCE_OPNUM].Setup = DetectDceOpnumSetup;
+ sigmatch_table[DETECT_DCE_OPNUM].Free = DetectDceOpnumFree;
+#ifdef UNITTESTS
+ sigmatch_table[DETECT_DCE_OPNUM].RegisterTests = DetectDceOpnumRegisterTests;
+#endif
+ DetectSetupParseRegexes(PARSE_REGEX, &parse_regex);
+
+ g_dce_generic_list_id = DetectBufferTypeRegister("dce_generic");
+}
+
+/**
+ * \brief App layer match function for the "dce_opnum" 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.
+ */
+static int DetectDceOpnumMatchRust(DetectEngineThreadCtx *det_ctx,
+ Flow *f, uint8_t flags, void *state, void *txv,
+ const Signature *s, const SigMatchCtx *m)
+{
+ SCEnter();
+
+ if (f->alproto == ALPROTO_DCERPC) {
+ return rs_dcerpc_opnum_match(txv, (void *)m);
+ }
+
+ if (rs_smb_tx_match_dce_opnum(txv, (void *)m) != 1)
+ SCReturnInt(0);
+
+ SCReturnInt(1);
+}
+
+/**
+ * \brief Creates a SigMatch for the "dce_opnum" keyword being sent as argument,
+ * and appends it to the rs_dcerpc_opnum_matchSignature(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 DetectDceOpnumSetup(DetectEngineCtx *de_ctx, Signature *s, const char *arg)
+{
+ if (arg == NULL) {
+ SCLogError("Error parsing dce_opnum option in "
+ "signature, option needs a value");
+ return -1;
+ }
+
+ if (DetectSignatureSetAppProto(s, ALPROTO_DCERPC) < 0)
+ return -1;
+
+ void *dod = rs_dcerpc_opnum_parse(arg);
+ if (dod == NULL) {
+ SCLogError("Error parsing dce_opnum option in "
+ "signature");
+ return -1;
+ }
+
+ SigMatch *sm = SigMatchAlloc();
+ if (sm == NULL) {
+ DetectDceOpnumFree(de_ctx, dod);
+ return -1;
+ }
+
+ sm->type = DETECT_DCE_OPNUM;
+ sm->ctx = (void *)dod;
+
+ SigMatchAppendSMToList(s, sm, g_dce_generic_list_id);
+ return 0;
+}
+
+static void DetectDceOpnumFree(DetectEngineCtx *de_ctx, void *ptr)
+{
+ SCEnter();
+ if (ptr != NULL) {
+ rs_dcerpc_opnum_free(ptr);
+ }
+ SCReturn;
+}
+
+/************************************Unittests*********************************/
+
+#ifdef UNITTESTS
+
+/* Disabled because of bug_753. Would be enabled, once we rewrite
+ * dce parser */
+#if 0
+
+/**
+ * \test Test a valid dce_opnum(with multiple values) with a bind, bind_ack,
+ * and multiple request/responses with a match test after each frag parsing.
+ */
+static int DetectDceOpnumTestParse10(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(&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_opnum:2,15,22; sid:1;)");
+ if (s == NULL) {
+ goto end;
+ }
+
+ SigGroupBuild(de_ctx);
+ DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
+
+ SCLogDebug("sending bind");
+
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
+ dcerpc_bind, dcerpc_bind_len);
+ if (r != 0) {
+ SCLogDebug("AppLayerParse for dcerpc bind 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;
+ SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
+
+ SCLogDebug("sending 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;
+ SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
+
+ SCLogDebug("sending request1");
+
+ /* 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, but should have: ");
+ 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 did match, shouldn't have on response1: ");
+ goto end;
+ }
+
+ /* 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, but should have on 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 did match, shouldn't have on response2: ");
+ 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, but should have on 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 did match, shouldn't have on response2: ");
+ goto end;
+ }
+
+ result = 1;
+
+ end:
+ if (alp_tctx != NULL)
+ AppLayerDestroyCtxThread(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_opnum entry(with multiple values) with multiple
+ * request/responses.
+ */
+static int DetectDceOpnumTestParse11(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_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_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(&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 = de_ctx->sig_list = SigInit(de_ctx,
+ "alert tcp any any -> any any "
+ "(msg:\"DCERPC\"; "
+ "dce_opnum:2-22; "
+ "sid:1;)");
+ if (s == NULL)
+ goto end;
+
+ SigGroupBuild(de_ctx);
+ DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
+
+ /* request1 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
+ dcerpc_request1, dcerpc_request1_len);
+ if (r != 0) {
+ SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ printf("AppLayerParse for dcerpcrequest1 failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ SCLogDebug("no dcerpc state: ");
+ printf("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))
+ goto end;
+
+ /* 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);
+ printf("AppLayerParse for dcerpcresponse1 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))
+ goto end;
+
+ /* 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);
+ printf("AppLayerParse for dcerpcrequest2 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))
+ 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);
+ printf("AppLayerParse for dcerpcresponse2 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))
+ 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);
+ printf("AppLayerParse for dcerpc request3 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))
+ 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);
+ printf("AppLayerParse for dcerpc response3 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))
+ goto end;
+
+ result = 1;
+
+ end:
+ if (alp_tctx != NULL)
+ AppLayerDestroyCtxThread(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_opnum(with multiple values) with a bind, bind_ack,
+ * and multiple request/responses with a match test after each frag parsing.
+ */
+static int DetectDceOpnumTestParse12(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,
+ };
+
+ 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,
+ };
+
+ uint8_t dcerpc_request1[] = {
+ 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x9a, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x82, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00, //opnum is 0x28 0x00
+ 0x00, 0x00, 0x00, 0x00, 0x07, 0x9f, 0x13, 0xd9,
+ 0x2d, 0x97, 0xf4, 0x4a, 0xac, 0xc2, 0xbc, 0x70,
+ 0xec, 0xaa, 0x9a, 0xd3, 0x01, 0x00, 0x00, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0x40, 0x80, 0x40, 0x00,
+ 0x44, 0x80, 0x40, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x09, 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x00, 0x4e,
+ 0x61, 0x6d, 0x65, 0x00, 0x35, 0x39, 0x31, 0x63,
+ 0x64, 0x30, 0x35, 0x38, 0x00, 0x00, 0x00, 0x00,
+ 0x17, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x17, 0x00, 0x00, 0x00, 0xd0, 0x2e, 0x08, 0x00,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x00, 0x00
+ };
+
+ uint8_t dcerpc_response1[] = {
+ 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x1c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ };
+
+ uint8_t dcerpc_request2[] = {
+ 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x54, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x07, 0x9f, 0x13, 0xd9,
+ 0x2d, 0x97, 0xf4, 0x4a, 0xac, 0xc2, 0xbc, 0x70,
+ 0xec, 0xaa, 0x9a, 0xd3, 0x09, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x4d, 0x6f, 0x00, 0x4e, 0x61, 0x6d, 0x65, 0x00,
+ 0x35, 0x39, 0x31, 0x63, 0x64, 0x30, 0x35, 0x38,
+ 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x4e, 0x6f, 0x6e, 0x65
+ };
+
+ uint8_t dcerpc_response2[] = {
+ 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x8c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0xd8, 0x17, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x58, 0x1d, 0x08, 0x00, 0xe8, 0x32, 0x08, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x4d, 0x6f, 0x00, 0x4e, 0x61, 0x6d, 0x65, 0x00,
+ 0x35, 0x39, 0x31, 0x63, 0x64, 0x30, 0x35, 0x38,
+ 0x00, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00,
+ 0xd0, 0x2e, 0x08, 0x00, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 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);
+
+ 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_opnum:30, 40; sid:1;)");
+ if (s == NULL)
+ goto end;
+
+ SigGroupBuild(de_ctx);
+ DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
+
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER | STREAM_START,
+ dcerpc_bind, dcerpc_bind_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+ p->flowflags &=~ FLOW_PKT_TOCLIENT;
+ p->flowflags |= FLOW_PKT_TOSERVER;
+ SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_bindack,
+ dcerpc_bindack_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+ p->flowflags &=~ FLOW_PKT_TOSERVER;
+ p->flowflags |= FLOW_PKT_TOCLIENT;
+ SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
+
+ /* request1 */
+ SCLogDebug("Sending request1");
+
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1,
+ dcerpc_request1_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 40) {
+ printf("dcerpc state holding invalid opnum. Holding %d, while we are "
+ "expecting 40: ", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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("signature 1 didn't match, should have: ");
+ goto end;
+ }
+
+ /* response1 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1,
+ dcerpc_response1_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 40) {
+ printf("dcerpc state holding invalid opnum. Holding %d, while we are "
+ "expecting 40\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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 on response 1, but shouldn't: ");
+ goto end;
+ }
+
+ /* request2 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2,
+ dcerpc_request2_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 30) {
+ printf("dcerpc state holding invalid opnum. Holding %d, while we are "
+ "expecting 30\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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 on request 2: ");
+ goto end;
+ }
+
+ /* response2 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT | STREAM_EOF, dcerpc_response2,
+ dcerpc_response2_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 30) {
+ printf("dcerpc state holding invalid opnum. Holding %d, while we are "
+ "expecting 30\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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 on response2, but shouldn't: ");
+ goto end;
+ }
+
+ result = 1;
+
+end:
+ if (alp_tctx != NULL)
+ AppLayerDestroyCtxThread(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_opnum(with multiple values) with a bind, bind_ack,
+ * and multiple request/responses with a match test after each frag parsing.
+ */
+static int DetectDceOpnumTestParse13(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_request1[] = {
+ 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x9a, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x82, 0x00, 0x00, 0x00, 0x00, 0x00, 0x28, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x07, 0x9f, 0x13, 0xd9,
+ 0x2d, 0x97, 0xf4, 0x4a, 0xac, 0xc2, 0xbc, 0x70,
+ 0xec, 0xaa, 0x9a, 0xd3, 0x01, 0x00, 0x00, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0x40, 0x80, 0x40, 0x00,
+ 0x44, 0x80, 0x40, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x09, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x09, 0x00, 0x00, 0x00, 0x4d, 0x6f, 0x00, 0x4e,
+ 0x61, 0x6d, 0x65, 0x00, 0x35, 0x39, 0x31, 0x63,
+ 0x64, 0x30, 0x35, 0x38, 0x00, 0x00, 0x00, 0x00,
+ 0x17, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x17, 0x00, 0x00, 0x00, 0xd0, 0x2e, 0x08, 0x00,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x00, 0x00
+ };
+
+ uint8_t dcerpc_response1[] = {
+ 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x1c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x04, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ };
+
+ uint8_t dcerpc_request2[] = {
+ 0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x54, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x3c, 0x00, 0x00, 0x00, 0x00, 0x00, 0x1e, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x07, 0x9f, 0x13, 0xd9,
+ 0x2d, 0x97, 0xf4, 0x4a, 0xac, 0xc2, 0xbc, 0x70,
+ 0xec, 0xaa, 0x9a, 0xd3, 0x09, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x4d, 0x6f, 0x00, 0x4e, 0x61, 0x6d, 0x65, 0x00,
+ 0x35, 0x39, 0x31, 0x63, 0x64, 0x30, 0x35, 0x38,
+ 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x4e, 0x6f, 0x6e, 0x65
+ };
+
+ uint8_t dcerpc_response2[] = {
+ 0x05, 0x00, 0x02, 0x03, 0x10, 0x00, 0x00, 0x00,
+ 0x8c, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x74, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
+ 0xd8, 0x17, 0x08, 0x00, 0x01, 0x00, 0x00, 0x00,
+ 0x58, 0x1d, 0x08, 0x00, 0xe8, 0x32, 0x08, 0x00,
+ 0x01, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x09, 0x00, 0x00, 0x00,
+ 0x4d, 0x6f, 0x00, 0x4e, 0x61, 0x6d, 0x65, 0x00,
+ 0x35, 0x39, 0x31, 0x63, 0x64, 0x30, 0x35, 0x38,
+ 0x00, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00, 0x17, 0x00, 0x00, 0x00,
+ 0xd0, 0x2e, 0x08, 0x00, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41, 0x41,
+ 0x41, 0x41, 0x41, 0x41, 0x00, 0x00, 0x00, 0x00,
+ 0x00, 0x00, 0x00, 0x00,
+ };
+
+ 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);
+
+ 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 = de_ctx->sig_list = SigInit(de_ctx,
+ "alert tcp any any -> any any "
+ "(msg:\"DCERPC\"; "
+ "dce_opnum:30, 40; "
+ "sid:1;)");
+ if (s == NULL)
+ goto end;
+
+ SigGroupBuild(de_ctx);
+ DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
+
+ /* request1 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request1,
+ dcerpc_request1_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 40) {
+ printf("dcerpc state holding invalid opnum after request1. Holding %d, while we are "
+ "expecting 40\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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))
+ goto end;
+
+ /* response1 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT, dcerpc_response1,
+ dcerpc_response1_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 40) {
+ printf("dcerpc state holding invalid opnum after response1. Holding %d, while we are "
+ "expecting 40\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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))
+ goto end;
+
+ /* request2 */
+ printf("Sending Request2\n");
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOSERVER, dcerpc_request2,
+ dcerpc_request2_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 30) {
+ printf("dcerpc state holding invalid opnum after request2. Holding %d, while we are "
+ "expecting 30\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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))
+ goto end;
+
+ /* response2 */
+ r = AppLayerParserParse(alp_tctx, &f, ALPROTO_DCERPC, STREAM_TOCLIENT | STREAM_EOF, dcerpc_response2,
+ dcerpc_response2_len);
+ if (r != 0) {
+ printf("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
+ goto end;
+ }
+
+ dcerpc_state = f.alstate;
+ if (dcerpc_state == NULL) {
+ printf("no dcerpc state: ");
+ goto end;
+ }
+
+ if (dcerpc_state->dcerpc.dcerpcrequest.opnum != 30) {
+ printf("dcerpc state holding invalid opnum after response2. Holding %d, while we are "
+ "expecting 30\n", dcerpc_state->dcerpc.dcerpcrequest.opnum);
+ 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))
+ goto end;
+
+ result = 1;
+
+ end:
+ if (alp_tctx != NULL)
+ AppLayerDestroyCtxThread(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
+
+static void DetectDceOpnumRegisterTests(void)
+{
+ /* Disabled because of bug_753. Would be enabled, once we rewrite
+ * dce parser */
+#if 0
+ UtRegisterTest("DetectDceOpnumTestParse10", DetectDceOpnumTestParse10, 1);
+ UtRegisterTest("DetectDceOpnumTestParse11", DetectDceOpnumTestParse11, 1);
+ UtRegisterTest("DetectDceOpnumTestParse12", DetectDceOpnumTestParse12, 1);
+ UtRegisterTest("DetectDceOpnumTestParse13", DetectDceOpnumTestParse13, 1);
+#endif
+}
+#endif /* UNITTESTS */
generated by cgit v1.2.3 (git 2.39.1) at 2025-02-16 05:29:10 +0000