Microsoft PowerPoint Malformed Record Memory Corruption

2006.08.10
Risk: High
Local: No
Remote: Yes
CWE: CWE-Other


CVSS Base Score: 7.5/10
Impact Subscore: 6.4/10
Exploitability Subscore: 10/10
Exploit range: Remote
Attack complexity: Low
Authentication: No required
Confidentiality impact: Partial
Integrity impact: Partial
Availability impact: Partial

Microsoft PowerPoint Malformed Record Memory Corruption Vulnerability By Sowhat of Nevis Labs 2006.08.08 http://www.nevisnetworks.com http://secway.org/advisory/AD20060808.txt Vendor Microsoft Inc. Microsoft PowerPoint 2000 Microsoft PowerPoint 2002 Microsoft Office PowerPoint 2003 PowerPoint 2004 for Mac PowerPoint 2004 v. X for Mac Remote: YES Exploitable: maybe ;) CVE: CVE-2006-3449 Overview: This vulnerability allows remote attackers to execute arbitrary code in the context of the logged in user. An array boundary condition may be violated by a malicious .PPT file in order to redirect execution into attacker-supplied data. Exploitation requires that the attacker coerce or persuade the victim to open a malicious .PPT file. Details: The specific flaw exists within the parsing of the BIFF(?) file format used by Microsoft PowerPoint. There will be a memory corruption during the analysis of a malformed PPT Record. The disassembly code: 3009a818 3945fc cmp [ebp-0x4],eax 3009a81b 7703 ja POWERPNT+0x9a820 (3009a820) 3009a81d 8b45fc mov eax,[ebp-0x4] 3009a820 8b7308 mov esi,[ebx+0x8] 3009a823 8b7d08 mov edi,[ebp+0x8] 3009a826 2945fc sub [ebp-0x4],eax 3009a829 014508 add [ebp+0x8],eax 3009a82c 8bc8 mov ecx,eax 3009a82e 8bd1 mov edx,ecx 3009a830 c1e902 shr ecx,0x2 3009a833 f3a5 rep movsd ----> Access violation here. :) 3009a835 8bca mov ecx,edx 3009a837 83e103 and ecx,0x3 3009a83a f3a4 rep movsb 3009a83c 014308 add [ebx+0x8],eax 3009a83f 014318 add [ebx+0x18],eax 3009a842 837dfc00 cmp dword ptr [ebp-0x4],0x0 3009a846 75b7 jnz POWERPNT+0x9a7ff (3009a7ff) 3009a848 8b450c mov eax,[ebp+0xc] 3009a84b 5f pop edi 3009a84c 5e pop esi 3009a84d 5b pop ebx 3009a84e c9 leave 3009a84f c20800 ret 0x8 Code execution may possible. POC: No POC will be supplied Fix: Microsoft has released an update for Microsoft Office which is set to address this issue. This can be downloaded from: http://www.microsoft.com/technet/security/bulletin/MS06-048.mspx Vendor Response: 2006.07.14 Vendor notified via secure (at) microsoft (dot) com [email concealed] 2006.07.15 Vendor responded 2006.08.08 Vendor released MS06-048 patch 2006.08.08 Advisory released Common Vulnerabilities and Exposures (CVE) Information: The Common Vulnerabilities and Exposures (CVE) project has assigned the following names to these issues. These are candidates for inclusion in the CVE list (http://cve.mitre.org), which standardizes names for security problems. CVE-2006-3449 Greetings to Becky PhD. ;) Reference: 1. http://www.microsoft.com/technet/security/Bulletin/MS06-048.mspx 2. http://secway.org/vuln.htm -- Sowhat http://secway.org "Life is like a bug, Do you know how to exploit it ?"


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