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Microsoft Windows Media Player Bitmap Handling Buffer Overflow Vulnerability

Risk
High

Date Discovered
2/14/2006 12:00:00 AM

Description
Microsoft Windows Media Player is prone to a remote buffer overflow vulnerability. The vulnerability arises when the application handles a skin file containing a specially crafted Bitmap image. This issue can also be triggered by just supplying a malicious Bitmap to the application, however, it should be noted that Windows Media Player is not the default handler for bitmap files. A successful attack can corrupt process memory and result in arbitrary code execution. This may facilitate a remote compromise in the context of the vulnerable user.

Symantec Enterprise Security Manager
Symantec Enterprise Security Manager posted an update to the OS Patch Policy that detects and reports systems that are not patched against this vulnerability. Click here for the advisory released February 14, 2006.

Symantec Vulnerability Assessment Symantec Vulnerability Assessment detects and reports this vulnerability. Click here for the advisory released February 15, 2006.

Technologies Affected
Microsoft Windows Media Player 10.0
Microsoft Windows Media Player 7.1
Microsoft Windows Media Player 8.0
Microsoft Windows Media Player 9.0
Microsoft Windows 98
Microsoft Windows 98SE
Microsoft Windows ME

Recommendations
Run all client software as a non-privileged user with minimal access rights.
Non-administrative software should always be run as an unprivileged user with minimal access rights to reduce the impact of latent vulnerabilities.
Deploy network intrusion detection systems to monitor network traffic for malicious activity.
Network intrusion detection systems should be deployed to monitor network traffic for signs of anomalous or suspicious activity. This includes but is not limited to requests that include NOP sleds and unexplained ingoing and outgoing traffic. This may indicate exploitation attempts or activity that results from successful exploitation.
Do not accept or execute files from untrusted or unknown sources.
Users should be extremely cautious about loading images that originate from potentially malicious or unknown sources. This may reduce the likelihood of exploitation.
Do not follow links provided by unknown or untrusted sources.
Refusing to follow all links, including links to image files that originate from unknown or untrusted users may reduce the exposure to this issue.
Implement multiple redundant layers of security.
As it may be possible that this issue will be leveraged to execute code, memory protection schemes are recommended. Memory protection schemes such as non-executable stack/heap configurations and randomly mapped memory segments will complicate exploitation of memory corruption vulnerabilities.
Do not open email messages from unknown or untrusted individuals.
Refusing to open emails from unknown or untrusted individuals or groups that contain PNG image files may reduce exposure to this issue.

Microsoft has released updates to address this vulnerability in supported versions of the Windows operating system.
Microsoft Windows Media Player 10.0:

Microsoft Upgrade Security Update for Windows Media Player 10 for Windows XP (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=182735E1-9382-4F2E-A624-D2316A96B411&displaylang=en

Microsoft Windows Media Player 9.0:
Microsoft Upgrade Security Update for Windows Media Player 9 (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=8F9EEF16-04F7-4DA8-A0EF-1797B52D0B4B&displaylang=en

Microsoft Windows Media Player 7.1:
Microsoft Upgrade Security Update for Windows Media Player 7.1 for Windows 2000 (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=26A0B9E1-1242-4E55-B3D4-8377B83257C6&displaylang=en

Microsoft Windows Media Player 9.0:
Microsoft Upgrade Security Update for Windows Media Player 9 (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=8F9EEF16-04F7-4DA8-A0EF-1797B52D0B4B&displaylang=en
Microsoft Upgrade Security Update for Windows Media Player 9 (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=8F9EEF16-04F7-4DA8-A0EF-1797B52D0B4B&displaylang=en

Microsoft Windows Media Player 8.0:
Microsoft Upgrade Security Update for Windows Media Player 8 for Windows XP (KB911565)
http://www.microsoft.com/downloads/details.aspx?familyid=110054F2-244D-4036-B98C-E951CBA7E9BA&displaylang=en

References
Source: Microsoft Security Bulletin MS06-005
URL: http://www.microsoft.com/technet/security/Bulletin/MS06-005.mspx

Credits
Discovered by Marc Maiffret of eEye.


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