Full Disclosure mailing list archives
Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038)
From: Alexander Sotirov <asotirov () determina com>
Date: Fri, 30 Mar 2007 17:28:54 -0700
Jan Wrobel wrote:
I don't know if this rule detects all possible exploits or just one particular type. Here is a Firekeeper version of the rule, which can be used to detect sites hosting malicious files: alert (msg:"BLEEDING-EDGE CURRENT EVENTS MS ANI exploit"; body_content:"|54 53 49 4C 03 00 00 00 00 00 00 00 54 53 49 4C 04 00 00 00 02 02 02 02 61 6E 69 68 52|"; reference:url,http://isc.sans.org/diary.html?storyid=2534; reference:url,http://www.avertlabs.com/research/blog/?p=233; reference:url,doc.bleedingthreats.net/2003519; fid:2003519; rev:1;)
A better way would be to look for all files that start with "RIFF" and contain two copies of the string "anih", the first one followed by the dword 0x24, the second one followed by a dword that's not 0x24. This should detect the exploitation of the stack overflow with no false negatives. To avoid false positives, you'll need code to parse all records in the ANI file and check for more an "anih" record with a size not equal to 0x24. Here's the regexp in Perl (somebody please convert it to a Snort rule) /^RIFF.*anih\x24\x00\x00\x00.*anih(?!\x24\x00\x00\x00)/ Alex
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Current thread:
- 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) Alexander Sotirov (Mar 29)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) James Rankin (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) James Matthews (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) Jan Wrobel (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) Alexander Sotirov (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows(CVE-2007-0038) Eric Sites (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) Alexander Sotirov (Mar 30)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) Alexander Sotirov (Mar 31)
- Re: 0-day ANI vulnerability in Microsoft Windows (CVE-2007-0038) James Rankin (Mar 30)