Multiple (4) Microsoft Windows Media Player .ASF Remote Code Execution Vulnerabilities

Notification Type: IBM Internet Security Systems Protection Advisory
Notification Date: Dec. 11, 2007
Notification Version: 1.0
   
Name: Multiple (4) Microsoft Windows Media Player .ASF Remote Code Execution Vulnerabilities
Public disclosure/
In the wild date:
Dec. 11, 2007 (vuln disclosure)
CVE: CVE-2007-0064
Description:

Four vulnerabilities in Microsoft Windows Media Player could allow remote code execution.  By creating a malicious .ASP file and enticing a user to click a link or open a file, an attacker could trigger a heap overflow through a malformed ASF stream and remotely execute unauthorized code with the privileges of the user.

Discoverer: Ryan Smith and Alex Wheeler of IBM X-Force

 

ISS Coverage

Product Content Version
Network Sensor 7.0
Proventia A
Proventia IPS (G/GX)
Server Sensor 7.0
Proventia Multifunction Appliance
Proventia Server (Linux)
27.070
Proventia Server (Windows)
Proventia Desktop
x.x.x.2080
BlackICE PC Protection 3.6 CQN
Propagation Techniques ISS Protection Available
remote exploit Media_File_BO Aug 16, 2007

Detailed Description

Business Impact:

Microsoft Windows Media Player is an application that is installed with most modern Microsoft operating systems, such as Windows XP, Vista, 2000, and Server 2003.  Although this vulnerability may require some user interaction, a successful exploit would result in remote code execution and possibly complete compromise of the system.  The widespread nature of Windows Media Player coupled with the impact of the vulnerability means this issue should be considered highly critical.

CVSS  for XFIDs 38827, 38828, 38829, 38830: Base Score: 10.0
  Access Vector: Network
Access Complexity: Low
Authentication: None
Confidentiality Impact: Complete
Integrity Impact: Complete
Availability Impact: Complete
Impact Bias: None
Adjusted Temporal Score: 7.4
  Exploitability: Unproven
Remediation Level: Official-Fix
Report Confidence: Confirmed
Affected Products: For a full list of affected versions, see references below.
Technical Description:

.ASF is a file format that is processed by Windows Media Player.  This file format contains three mandatory header objects and, sometimes, Stream Property entries. The four vulnerabilities in this advisory are related to the Stream Properties entries.

  • Audio_conceal_none entry.  This entry has a corresponding entry length that is an arbitrary short. It is possible to craft a length value which, after some addition and truncation, will result in a small buffer being allocated. If a large copy occurs, it will overflow the heap and possibly allow remote code execution. (XFID 38828)
  • Degradable JPEG Media entry. This entry has a corresponding entry length that is an arbitrary short. It is possible to craft a length value which, after some addition and truncation, will result in a small buffer being allocated. If a large copy occurs, it will overflow the heap and possibly allow remote code execution. (XFID 38827)
  • Error correction entry. This entry has a corresponding entry length that is an arbitrary short. It is possible to craft a length value which, after some addition and truncation, will result in a small buffer being allocated. If a large copy occurs, it will overflow the heap and possibly allow remote code execution. (XFID 38829)
  • The Stream Property entries may also contain both a type-specific data length and an error correction data length. Arithmetic is performed on these integers in order to arrive at the size of a chunk of memory to allocate.  Due to a corner case in the arithmetic, if the two sizes are large enough, then a memory overflow may occur possibly leading to remote code execution (XFID 38830).

Remediation:

Patches are available for this issue. See References for details.

References

XFDB http://xforce.iss.net/xforce/xfdb/38827
http://xforce.iss.net/xforce/xfdb/38828
http://xforce.iss.net/xforce/xfdb/38829
http://xforce.iss.net/xforce/xfdb/38830
Microsoft: http://www.microsoft.com/technet/security/Bulletin/MS07-068.mspx

Revision History

1.0

Initial publication.

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