Dear sapheal@xxxxxxx and all, In order to call some bug "critical security vulnerability", you must show critical security impact from this vulnerability. For local vulnerability security impact is usually privilege escalation. That is, local unprivileged user should be able to obtain privileges of another user or system account by exploiting this bug. Under Unix, local vulnerabilities are usually because of the bugs in some suid application. Under Windows there is no suid applications. To escalate privileges you must exploit vulnerability in some system component or service. mc.exe is not service and is not system component. I can't say there is no security impact from this bug at all. As an example, you can execute malware code in context of signed application and bypass some policy. But it's definitely not "critical security vulnerability". Sorry for this short lecture. --Tuesday, January 2, 2007, 10:06:30 PM, you wrote to bugtraq@xxxxxxxxxxxxxxxxx: shp> Synopsis: Windows NT Message Compiler 1.00.5239 arbitrary code execution shp> Product: Microsoft Windows XP shp> Issue: shp> ====== shp> A critical security vulnerability has been found in Windows NT Message Compiler. shp> Arbitrary code execution might be possible (local exploitation possible only). shp> Details: shp> ======== shp> MC (Windows NT Message Compiler) when provided a MC-filename longer than shp> requested crashed due to memory corruption. Memory corruption conditions shp> might allow the attacker to escalate privilleges. shp> When overwriting the buffer with "A" (0x41): shp> Unhandled exception at 0x01003468 in MC.EXE: 0xC0000005: shp> Access violation reading location 0x41414141. shp> First-chance exception at 0x01003468 in MC.EXE: 0xC0000005: shp> Access violation reading location 0x41414141. shp> Affected Versions shp> ================= shp> Microsoft (R) Message Compiler Version 1.00.5239 shp> Solution shp> ========= shp> Proper bounds-checking. shp> Kind regards, shp> Michal Bucko (sapheal) shp> hack.pl -- ~/ZARAZA http://www.security.nnov.ru/
