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suricata/src/detect-dce-stub-data.c

1871 lines
78 KiB
C

/* 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 <anoopsaldanha@gmail.com>
*
* Implements dce_stub_data 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 "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 "detect-dce-stub-data.h"
#include "util-debug.h"
#include "util-unittest.h"
#include "util-unittest-helper.h"
#include "stream-tcp.h"
int DetectDceStubDataMatch(ThreadVars *, DetectEngineThreadCtx *, Flow *, uint8_t,
void *, Signature *, SigMatch *);
static int DetectDceStubDataSetup(DetectEngineCtx *, Signature *, char *);
/**
* \brief Registers the keyword handlers for the "dce_stub_data" keyword.
*/
void DetectDceStubDataRegister(void)
{
sigmatch_table[DETECT_DCE_STUB_DATA].name = "dce_stub_data";
sigmatch_table[DETECT_DCE_STUB_DATA].Match = NULL;
sigmatch_table[DETECT_DCE_STUB_DATA].AppLayerMatch = NULL;
sigmatch_table[DETECT_DCE_STUB_DATA].Setup = DetectDceStubDataSetup;
sigmatch_table[DETECT_DCE_STUB_DATA].Free = NULL;
sigmatch_table[DETECT_DCE_STUB_DATA].RegisterTests = DetectDceStubDataRegisterTests;
sigmatch_table[DETECT_DCE_STUB_DATA].flags |= SIGMATCH_NOOPT;
sigmatch_table[DETECT_DCE_STUB_DATA].flags |= SIGMATCH_PAYLOAD;
return;
}
/**
* \brief Creates a SigMatch for the \"dce_stub_data\" 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 DetectDceStubDataSetup(DetectEngineCtx *de_ctx, Signature *s, char *arg)
{
if (s->alproto != ALPROTO_UNKNOWN && s->alproto != ALPROTO_DCERPC) {
SCLogError(SC_ERR_CONFLICTING_RULE_KEYWORDS,
"rule contains conflicting keywords.");
goto error;
}
s->list = DETECT_SM_LIST_DMATCH;
s->alproto = ALPROTO_DCERPC;
s->flags |= SIG_FLAG_APPLAYER;
return 0;
error:
return -1;
}
/************************************Unittests*********************************/
#ifdef UNITTESTS
static int DetectDceStubDataTestParse01(void)
{
Signature s;
int result = 0;
memset(&s, 0, sizeof(Signature));
result = (DetectDceStubDataSetup(NULL, &s, NULL) == 0);
if (s.sm_lists[DETECT_SM_LIST_AMATCH] == NULL) {
result = 1;
} else {
result = 0;
}
return result;
}
/**
* \test Test a valid dce_stub_data entry with bind, bind_ack, request frags.
*/
static int DetectDceStubDataTestParse02(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
};
/* todo chop the request frag length and change the
* length related parameters in the frag */
uint8_t dcerpc_request[] = {
0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
0xec, 0x0c, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0xd4, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00,
0xe1, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xe1, 0x03, 0x00, 0x00, 0x83, 0xc7, 0x0b, 0x47,
0x47, 0x47, 0x47, 0x81, 0x37, 0x22, 0xa5, 0x9b,
0x4a, 0x75, 0xf4, 0xa3, 0x61, 0xd3, 0xbe, 0xdd,
0x5a, 0xfb, 0x20, 0x1e, 0xfc, 0x10, 0x8e, 0x0f,
0xa5, 0x9f, 0x4a, 0x22, 0x20, 0x9b, 0xa8, 0xd5,
0xc4, 0xff, 0xc1, 0x3f, 0xbd, 0x9b, 0x4a, 0x22,
0x2e, 0xc0, 0x7a, 0xa9, 0xfe, 0x97, 0xc9, 0xe1,
0xa9, 0xf3, 0x2f, 0x22, 0xc9, 0x9b, 0x22, 0x50,
0xa5, 0xf5, 0x4a, 0x4a, 0xce, 0x9b, 0x2f, 0x22,
0x2e, 0x6f, 0xc1, 0xe1, 0xf3, 0xa8, 0x83, 0xa2,
0x64, 0x98, 0xc1, 0x62, 0xa1, 0xa0, 0x89, 0x56,
0xa8, 0x1b, 0x8b, 0x2b, 0x2e, 0xe3, 0x7a, 0xd1,
0x03, 0xef, 0x58, 0x7c, 0x4e, 0x7d, 0x14, 0x76,
0xfa, 0xc3, 0x7f, 0x02, 0xa5, 0xbb, 0x4a, 0x89,
0x47, 0x6c, 0x12, 0xc9, 0x70, 0x18, 0x8e, 0x3a,
0x2e, 0xcb, 0x52, 0xa9, 0x67, 0x98, 0x0a, 0x1e,
0x2e, 0xc3, 0x32, 0x21, 0x7f, 0x10, 0x31, 0x3e,
0xa6, 0x61, 0xc1, 0x61, 0x85, 0x98, 0x88, 0xa9,
0xee, 0x83, 0x22, 0x51, 0xd6, 0xda, 0x4a, 0x4a,
0xc1, 0xff, 0x38, 0x47, 0xcd, 0xe9, 0x25, 0x41,
0xe4, 0xf3, 0x0d, 0x47, 0xd1, 0xcb, 0xc1, 0xd6,
0x1e, 0x95, 0x4a, 0x22, 0xa5, 0x73, 0x08, 0x22,
0xa5, 0x9b, 0xc9, 0xe6, 0xb5, 0xcd, 0x22, 0x43,
0xd7, 0xe2, 0x0b, 0x4a, 0xe9, 0xf2, 0x28, 0x50,
0xcd, 0xd7, 0x25, 0x43, 0xc1, 0x10, 0xbe, 0x99,
0xa9, 0x9b, 0x4a, 0x22, 0x4d, 0xb8, 0x4a, 0x22,
0xa5, 0x18, 0x8e, 0x2e, 0xf3, 0xc9, 0x22, 0x4e,
0xc9, 0x9b, 0x4a, 0x4a, 0x96, 0xa9, 0x64, 0x46,
0xcd, 0xec, 0x39, 0x10, 0xfa, 0xcf, 0xb5, 0x76,
0x81, 0x8f, 0xc9, 0xe6, 0xa9, 0x10, 0x82, 0x7c,
0xff, 0xc4, 0xa1, 0x0a, 0xf5, 0xcc, 0x1b, 0x74,
0xf4, 0x10, 0x81, 0xa9, 0x9d, 0x98, 0xb0, 0xa1,
0x65, 0x9f, 0xb9, 0x84, 0xd1, 0x9f, 0x13, 0x7c,
0x47, 0x76, 0x12, 0x7c, 0xfc, 0x10, 0xbb, 0x09,
0x55, 0x5a, 0xac, 0x20, 0xfa, 0x10, 0x7e, 0x15,
0xa6, 0x69, 0x12, 0xe1, 0xf7, 0xca, 0x22, 0x57,
0xd5, 0x9b, 0x4a, 0x4a, 0xd1, 0xfa, 0x38, 0x56,
0xcd, 0xcc, 0x19, 0x63, 0xf6, 0xf3, 0x2f, 0x56,
0xa5, 0x9b, 0x22, 0x51, 0xca, 0xf8, 0x21, 0x48,
0xa5, 0xf3, 0x28, 0x4b, 0xcb, 0xff, 0x22, 0x47,
0xcb, 0x9b, 0x4a, 0x4a, 0xc9, 0xf2, 0x39, 0x56,
0xcd, 0xeb, 0x3e, 0x22, 0xa5, 0xf3, 0x2b, 0x41,
0xc6, 0xfe, 0xc1, 0xfe, 0xf6, 0xca, 0xc9, 0xe1,
0xad, 0xc8, 0x1b, 0xa1, 0x66, 0x93, 0x19, 0x73,
0x26, 0x58, 0x42, 0x71, 0xf4, 0x18, 0x89, 0x2a,
0xf6, 0xca, 0xb5, 0xf5, 0x2c, 0xd8, 0x42, 0xdd,
0x72, 0x12, 0x09, 0x26, 0x5a, 0x4c, 0xc3, 0x21,
0x5a, 0x4c, 0xc3, 0x61, 0x59, 0x64, 0x9d, 0xab,
0xe6, 0x63, 0xc9, 0xc9, 0xad, 0x10, 0xa9, 0xa3,
0x49, 0x0b, 0x4b, 0x22, 0xa5, 0xcf, 0x22, 0x23,
0xa4, 0x9b, 0x4a, 0xdd, 0x31, 0xbf, 0xe2, 0x23,
0xa5, 0x9b, 0xcb, 0xe6, 0x35, 0x9a, 0x4a, 0x22,
0xcf, 0x9d, 0x20, 0x23, 0xcf, 0x99, 0xb5, 0x76,
0x81, 0x83, 0x20, 0x22, 0xcf, 0x9b, 0x20, 0x22,
0xcd, 0x99, 0x4a, 0xe6, 0x96, 0x10, 0x96, 0x71,
0xf6, 0xcb, 0x20, 0x23, 0xf5, 0xf1, 0x5a, 0x71,
0xf5, 0x64, 0x1e, 0x06, 0x9d, 0x64, 0x1e, 0x06,
0x8d, 0x5c, 0x49, 0x32, 0xa5, 0x9b, 0x4a, 0xdd,
0xf1, 0xbf, 0x56, 0xa1, 0x61, 0xbf, 0x13, 0x78,
0xf4, 0xc9, 0x1a, 0x11, 0x77, 0xc9, 0x22, 0x51,
0xc0, 0xf5, 0x2e, 0xa9, 0x61, 0xc9, 0x22, 0x50,
0xc0, 0xf8, 0x3c, 0xa9, 0x71, 0xc9, 0x1b, 0x72,
0xf4, 0x64, 0x9d, 0xb1, 0x5a, 0x4c, 0xdf, 0xa1,
0x61, 0x8b, 0x12, 0x78, 0xfc, 0xc8, 0x1f, 0x72,
0x2e, 0x77, 0x1a, 0x42, 0xcf, 0x9f, 0x10, 0x72,
0x2e, 0x47, 0xa2, 0x63, 0xa5, 0x9b, 0x4a, 0x48,
0xa5, 0xf3, 0x26, 0x4e, 0xca, 0xf8, 0x22, 0x57,
0xc4, 0xf7, 0x0b, 0x4a, 0xf3, 0xf2, 0x38, 0x56,
0xf1, 0xcd, 0xb5, 0xf5, 0x26, 0x5f, 0x5a, 0x78,
0xf7, 0xf1, 0x0a, 0x4a, 0xa5, 0x8b, 0x4a, 0x22,
0xf7, 0xf1, 0x4a, 0xdd, 0x75, 0x12, 0x0e, 0x06,
0x81, 0xc1, 0xd9, 0xca, 0xb5, 0x9b, 0x4a, 0x22,
0xc4, 0xc0, 0xb5, 0xc1, 0xc5, 0xa8, 0x8a, 0x92,
0xa1, 0x73, 0x5c, 0x22, 0xa5, 0x9b, 0x2b, 0xe1,
0xc5, 0xc9, 0x19, 0x11, 0x65, 0x73, 0x40, 0x22,
0xa5, 0x9b, 0x11, 0x78, 0xa6, 0x43, 0x61, 0xf2,
0xd0, 0x74, 0x2b, 0xe1, 0x96, 0x52, 0x1b, 0x70,
0xf6, 0x64, 0x3f, 0x22, 0x5a, 0xcf, 0x4f, 0x26,
0x20, 0x5b, 0x34, 0x23, 0x66, 0x64, 0x1f, 0xd2,
0xa5, 0x9b, 0x4a, 0x22, 0xa5, 0x9b, 0x4a, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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,
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0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
0x01, 0x02, 0x03, 0x04
};
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 = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"DCERPC\"; "
"dce_stub_data; content:\"|42 42 42 42|\";"
"sid:1;)");
if (s == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, 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);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
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);
/* we shouldn't have any stub data */
if (PacketAlertCheck(p, 1))
goto end;
/* do detect */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_bindack,
dcerpc_bindack_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
/* we shouldn't have any stub data */
if (PacketAlertCheck(p, 1))
goto end;
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER | STREAM_EOF, dcerpc_request,
dcerpc_request_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
/* we should have the stub data since we previously parsed a request frag */
if (!PacketAlertCheck(p, 1))
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_stub_data with just a request frag.
*/
static int DetectDceStubDataTestParse03(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;
/* todo chop the request frag length and change the
* length related parameters in the frag */
uint8_t dcerpc_request[] = {
0x05, 0x00, 0x00, 0x03, 0x10, 0x00, 0x00, 0x00,
0xec, 0x0c, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00,
0xd4, 0x0c, 0x00, 0x00, 0x00, 0x00, 0x09, 0x00,
0xe1, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0xe1, 0x03, 0x00, 0x00, 0x83, 0xc7, 0x0b, 0x47,
0x47, 0x47, 0x47, 0x81, 0x37, 0x22, 0xa5, 0x9b,
0x4a, 0x75, 0xf4, 0xa3, 0x61, 0xd3, 0xbe, 0xdd,
0x5a, 0xfb, 0x20, 0x1e, 0xfc, 0x10, 0x8e, 0x0f,
0xa5, 0x9f, 0x4a, 0x22, 0x20, 0x9b, 0xa8, 0xd5,
0xc4, 0xff, 0xc1, 0x3f, 0xbd, 0x9b, 0x4a, 0x22,
0x2e, 0xc0, 0x7a, 0xa9, 0xfe, 0x97, 0xc9, 0xe1,
0xa9, 0xf3, 0x2f, 0x22, 0xc9, 0x9b, 0x22, 0x50,
0xa5, 0xf5, 0x4a, 0x4a, 0xce, 0x9b, 0x2f, 0x22,
0x2e, 0x6f, 0xc1, 0xe1, 0xf3, 0xa8, 0x83, 0xa2,
0x64, 0x98, 0xc1, 0x62, 0xa1, 0xa0, 0x89, 0x56,
0xa8, 0x1b, 0x8b, 0x2b, 0x2e, 0xe3, 0x7a, 0xd1,
0x03, 0xef, 0x58, 0x7c, 0x4e, 0x7d, 0x14, 0x76,
0xfa, 0xc3, 0x7f, 0x02, 0xa5, 0xbb, 0x4a, 0x89,
0x47, 0x6c, 0x12, 0xc9, 0x70, 0x18, 0x8e, 0x3a,
0x2e, 0xcb, 0x52, 0xa9, 0x67, 0x98, 0x0a, 0x1e,
0x2e, 0xc3, 0x32, 0x21, 0x7f, 0x10, 0x31, 0x3e,
0xa6, 0x61, 0xc1, 0x61, 0x85, 0x98, 0x88, 0xa9,
0xee, 0x83, 0x22, 0x51, 0xd6, 0xda, 0x4a, 0x4a,
0xc1, 0xff, 0x38, 0x47, 0xcd, 0xe9, 0x25, 0x41,
0xe4, 0xf3, 0x0d, 0x47, 0xd1, 0xcb, 0xc1, 0xd6,
0x1e, 0x95, 0x4a, 0x22, 0xa5, 0x73, 0x08, 0x22,
0xa5, 0x9b, 0xc9, 0xe6, 0xb5, 0xcd, 0x22, 0x43,
0xd7, 0xe2, 0x0b, 0x4a, 0xe9, 0xf2, 0x28, 0x50,
0xcd, 0xd7, 0x25, 0x43, 0xc1, 0x10, 0xbe, 0x99,
0xa9, 0x9b, 0x4a, 0x22, 0x4d, 0xb8, 0x4a, 0x22,
0xa5, 0x18, 0x8e, 0x2e, 0xf3, 0xc9, 0x22, 0x4e,
0xc9, 0x9b, 0x4a, 0x4a, 0x96, 0xa9, 0x64, 0x46,
0xcd, 0xec, 0x39, 0x10, 0xfa, 0xcf, 0xb5, 0x76,
0x81, 0x8f, 0xc9, 0xe6, 0xa9, 0x10, 0x82, 0x7c,
0xff, 0xc4, 0xa1, 0x0a, 0xf5, 0xcc, 0x1b, 0x74,
0xf4, 0x10, 0x81, 0xa9, 0x9d, 0x98, 0xb0, 0xa1,
0x65, 0x9f, 0xb9, 0x84, 0xd1, 0x9f, 0x13, 0x7c,
0x47, 0x76, 0x12, 0x7c, 0xfc, 0x10, 0xbb, 0x09,
0x55, 0x5a, 0xac, 0x20, 0xfa, 0x10, 0x7e, 0x15,
0xa6, 0x69, 0x12, 0xe1, 0xf7, 0xca, 0x22, 0x57,
0xd5, 0x9b, 0x4a, 0x4a, 0xd1, 0xfa, 0x38, 0x56,
0xcd, 0xcc, 0x19, 0x63, 0xf6, 0xf3, 0x2f, 0x56,
0xa5, 0x9b, 0x22, 0x51, 0xca, 0xf8, 0x21, 0x48,
0xa5, 0xf3, 0x28, 0x4b, 0xcb, 0xff, 0x22, 0x47,
0xcb, 0x9b, 0x4a, 0x4a, 0xc9, 0xf2, 0x39, 0x56,
0xcd, 0xeb, 0x3e, 0x22, 0xa5, 0xf3, 0x2b, 0x41,
0xc6, 0xfe, 0xc1, 0xfe, 0xf6, 0xca, 0xc9, 0xe1,
0xad, 0xc8, 0x1b, 0xa1, 0x66, 0x93, 0x19, 0x73,
0x26, 0x58, 0x42, 0x71, 0xf4, 0x18, 0x89, 0x2a,
0xf6, 0xca, 0xb5, 0xf5, 0x2c, 0xd8, 0x42, 0xdd,
0x72, 0x12, 0x09, 0x26, 0x5a, 0x4c, 0xc3, 0x21,
0x5a, 0x4c, 0xc3, 0x61, 0x59, 0x64, 0x9d, 0xab,
0xe6, 0x63, 0xc9, 0xc9, 0xad, 0x10, 0xa9, 0xa3,
0x49, 0x0b, 0x4b, 0x22, 0xa5, 0xcf, 0x22, 0x23,
0xa4, 0x9b, 0x4a, 0xdd, 0x31, 0xbf, 0xe2, 0x23,
0xa5, 0x9b, 0xcb, 0xe6, 0x35, 0x9a, 0x4a, 0x22,
0xcf, 0x9d, 0x20, 0x23, 0xcf, 0x99, 0xb5, 0x76,
0x81, 0x83, 0x20, 0x22, 0xcf, 0x9b, 0x20, 0x22,
0xcd, 0x99, 0x4a, 0xe6, 0x96, 0x10, 0x96, 0x71,
0xf6, 0xcb, 0x20, 0x23, 0xf5, 0xf1, 0x5a, 0x71,
0xf5, 0x64, 0x1e, 0x06, 0x9d, 0x64, 0x1e, 0x06,
0x8d, 0x5c, 0x49, 0x32, 0xa5, 0x9b, 0x4a, 0xdd,
0xf1, 0xbf, 0x56, 0xa1, 0x61, 0xbf, 0x13, 0x78,
0xf4, 0xc9, 0x1a, 0x11, 0x77, 0xc9, 0x22, 0x51,
0xc0, 0xf5, 0x2e, 0xa9, 0x61, 0xc9, 0x22, 0x50,
0xc0, 0xf8, 0x3c, 0xa9, 0x71, 0xc9, 0x1b, 0x72,
0xf4, 0x64, 0x9d, 0xb1, 0x5a, 0x4c, 0xdf, 0xa1,
0x61, 0x8b, 0x12, 0x78, 0xfc, 0xc8, 0x1f, 0x72,
0x2e, 0x77, 0x1a, 0x42, 0xcf, 0x9f, 0x10, 0x72,
0x2e, 0x47, 0xa2, 0x63, 0xa5, 0x9b, 0x4a, 0x48,
0xa5, 0xf3, 0x26, 0x4e, 0xca, 0xf8, 0x22, 0x57,
0xc4, 0xf7, 0x0b, 0x4a, 0xf3, 0xf2, 0x38, 0x56,
0xf1, 0xcd, 0xb5, 0xf5, 0x26, 0x5f, 0x5a, 0x78,
0xf7, 0xf1, 0x0a, 0x4a, 0xa5, 0x8b, 0x4a, 0x22,
0xf7, 0xf1, 0x4a, 0xdd, 0x75, 0x12, 0x0e, 0x06,
0x81, 0xc1, 0xd9, 0xca, 0xb5, 0x9b, 0x4a, 0x22,
0xc4, 0xc0, 0xb5, 0xc1, 0xc5, 0xa8, 0x8a, 0x92,
0xa1, 0x73, 0x5c, 0x22, 0xa5, 0x9b, 0x2b, 0xe1,
0xc5, 0xc9, 0x19, 0x11, 0x65, 0x73, 0x40, 0x22,
0xa5, 0x9b, 0x11, 0x78, 0xa6, 0x43, 0x61, 0xf2,
0xd0, 0x74, 0x2b, 0xe1, 0x96, 0x52, 0x1b, 0x70,
0xf6, 0x64, 0x3f, 0x22, 0x5a, 0xcf, 0x4f, 0x26,
0x20, 0x5b, 0x34, 0x23, 0x66, 0x64, 0x1f, 0xd2,
0xa5, 0x9b, 0x4a, 0x22, 0xa5, 0x9b, 0x4a, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 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, 0x41,
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0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42, 0x42,
0x01, 0x02, 0x03, 0x04
};
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 = de_ctx->sig_list = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"DCERPC\"; "
"dce_stub_data; content:\"|42 42 42 42|\";"
"sid:1;)");
if (s == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER | STREAM_START, dcerpc_request,
dcerpc_request_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
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))
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;
}
static int DetectDceStubDataTestParse04(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_stub_data; content:\"|00 02|\"; sid:1;)");
if (s == NULL)
goto end;
s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
"(msg:\"DCERPC\"; dce_stub_data; content:\"|00 75|\"; sid:2;)");
if (s == NULL)
goto end;
s = DetectEngineAppendSig(de_ctx, "alert tcp any any -> any any "
"(msg:\"DCERPC\"; dce_stub_data; content:\"|00 18|\"; sid:3;)");
if (s == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, 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);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
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) {
SCLogDebug("no dcerpc state: ");
goto end;
}
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_bindack,
dcerpc_bindack_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
/* request1 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER, dcerpc_request1,
dcerpc_request1_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (!PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* response1 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_response1,
dcerpc_response1_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* request2 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER, dcerpc_request2,
dcerpc_request2_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || !PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* response2 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_response2,
dcerpc_response2_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* request3 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER, dcerpc_request3,
dcerpc_request3_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || !PacketAlertCheck(p, 3))
goto end;
/* response3 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, 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);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
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;
}
static int DetectDceStubDataTestParse05(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_stub_data; content:\"|00 02|\"; "
"sid:1;)");
if (s == NULL)
goto end;
s = de_ctx->sig_list->next = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"DCERPC\"; "
"dce_stub_data; content:\"|00 75|\"; "
"sid:2;)");
if (s == NULL)
goto end;
s = de_ctx->sig_list->next->next = SigInit(de_ctx,
"alert tcp any any -> any any "
"(msg:\"DCERPC\"; "
"dce_stub_data; content:\"|00 18|\"; "
"sid:3;)");
if (s == NULL)
goto end;
SigGroupBuild(de_ctx);
DetectEngineThreadCtxInit(&th_v, (void *)de_ctx, (void *)&det_ctx);
/* request1 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, 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);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
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) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* response1 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_response1,
dcerpc_response1_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* request2 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER, dcerpc_request2,
dcerpc_request2_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || !PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* response2 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOCLIENT, dcerpc_response2,
dcerpc_response2_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOSERVER;
p->flowflags |= FLOW_PKT_TOCLIENT;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || PacketAlertCheck(p, 3))
goto end;
/* request3 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, alp_tctx, &f, ALPROTO_DCERPC,
STREAM_TOSERVER, dcerpc_request3,
dcerpc_request3_len);
if (r != 0) {
SCLogDebug("AppLayerParse for dcerpc failed. Returned %" PRId32, r);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
p->flowflags &=~ FLOW_PKT_TOCLIENT;
p->flowflags |= FLOW_PKT_TOSERVER;
/* do detect */
SigMatchSignatures(&th_v, de_ctx, det_ctx, p);
if (PacketAlertCheck(p, 1) || PacketAlertCheck(p, 2) || !PacketAlertCheck(p, 3))
goto end;
/* response3 */
FLOWLOCK_WRLOCK(&f);
r = AppLayerParserParse(NULL, 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);
FLOWLOCK_UNLOCK(&f);
goto end;
}
FLOWLOCK_UNLOCK(&f);
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)
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 DetectDceStubDataRegisterTests(void)
{
#ifdef UNITTESTS
UtRegisterTest("DetectDceStubDataTestParse01",
DetectDceStubDataTestParse01);
UtRegisterTest("DetectDceStubDataTestParse02",
DetectDceStubDataTestParse02);
UtRegisterTest("DetectDceStubDataTestParse03",
DetectDceStubDataTestParse03);
UtRegisterTest("DetectDceStubDataTestParse04",
DetectDceStubDataTestParse04);
UtRegisterTest("DetectDceStubDataTestParse05",
DetectDceStubDataTestParse05);
#endif
return;
}