Microsoft Malware Protection Engine TWO DoS Vulnerabilities
By Sowhat of Nevis Labs Date: 2008.05.14 http://www.nevisnetworks.com http://secway.org/advisory/AD20080514.txt CVE: CVE-2008-1437 CVE-2008-1438 Vendor Microsoft Affected: Windows Live OneCare Microsoft Antigen for Exchange Microsoft Antigen for SMTP Gateway Microsoft Windows Defender Microsoft Forefront Client Security Microsoft Forefront Security for Exchange Server Microsoft Forefront Security for SharePoint Standalone System Sweeper located in Diagnostics and Recovery Toolset 6.0 Details: There are two vulnerabilities idenitified in Microsoft Antivirus product. These vulnerabilities can be exploited to cause Denial of service. 1. CVE-2008-1437 PE Parsing Memory Corruption While scanning a specially crafted PE file, Malware orotection engine (MsMpEng.exe/mpengine.dll for Windows Live OneCare) will crash. Currently, There's no evidence of code execution found. Please note that this vulnerability can be triggered in various ways: a. by sending emails to target mail server which is protected by MS antivirus b. by sending emails to victim who is using Windows Onecare or Windows Defender. c. by convining the victim to visit some websites. d. by sending files (can be any extension) to victims through P2P/IM. Real Time protection is enabled by default, so in the case b&c, the vulnerability can be exploited without any further user interaction after the victim recieved the email or opened the website. 2. CVE-2008-1438 PE Parsing Disk Space D.o.S While parsing a specially crafted file with a malformed "size of header" is scanned by Microsoft Windows OneCare, there will be Disk Space DOS condition. Microsoft Malware protection engine will allocate disk space as much as the PE file "claimed", It can "eat" several Gb disk space of Windows installation driver. Proof of Concept: No POC will be released. Fix: Microsoft has released an update address this issue. http://www.microsoft.com/technet/security/Bulletin/MS08-029.mspx Vendor Response: 2008.04.18 Vendor notified via email 2008.04.18 Vendor response, developing for patch 2008.05.14 Patch Release 2008.05.14 Advisory released -- Sowhat http://secway.org "Life is like a bug, Do you know how to exploit it ?"
_______________________________________________ Full-Disclosure - We believe in it. Charter: http://lists.grok.org.uk/full-disclosure-charter.html Hosted and sponsored by Secunia - http://secunia.com/
