US-CERT Technical Cyber Security Alert TA05-312A -- Microsoft Windows Image Processing Vulnerabilities

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           National Cyber Alert System

     Technical Cyber Security Alert TA05-312A

Microsoft Windows Image Processing Vulnerabilities

Original release date: November 08, 2005
Last revised: –
Source: US-CERT

Systems Affected

 * Microsoft Windows 2000
 * Microsoft Windows XP
 * Microsoft Windows Server 2003

For more complete information, refer to Microsoft Security Bulletin
MS05-053.

Overview

Microsoft has released updates that address critical vulnerabilities
in Windows graphics rendering services. A remote, unauthenticated
attacker exploiting these vulnerabilities could execute arbitrary code
or cause a denial of service on an affected system.

I. Description

The Microsoft Security Bulletin for November 2005 addresses multiple
buffer overflows in Windows image processing routines. Viewing a
specially crafted image from an application that uses a vulnerable
routine may trigger these vulnerabilities. If this application can
access images from remote sources, such as web sites or email, then
remote exploitation is possible.

Further information is available in the following US-CERT
Vulnerability Notes:

VU#300549 - Microsoft Windows Graphics Rendering Engine buffer
overflow vulnerability

Microsoft Windows Graphics Rendering Engine contains a buffer overflow
that may allow a remote attacker to execute arbitrary code on a
vulnerable system.
(CVE-2005-2123)

VU#433341 - Microsoft Windows vulnerable to buffer overflow via
specially crafted "WMF" file

Microsoft Windows may be vulnerable to remote code execution via a
buffer overflow in the Windows Metafile image format handling.
(CVE-2005-2124)

VU#134756 - Microsoft Windows buffer overflow in Enhanced Metafile
rendering API

Microsoft Windows Enhanced Metafile Format image rendering routines
contain a buffer overflow flaw that may allow an attacker to cause a
denial-of-service condition.
(CVE-2005-0803)

III. Solution

Apply Updates

Microsoft has provided the updates to correct these vulnerabilities in
Microsoft Security Bulletin MS05-053. These updates are also available
on the Microsoft Update site.

II. Impact

A remote, unauthenticated attacker exploiting these vulnerabilities
could execute arbitrary code with the privileges of the user. If the
user is logged on with administrative privileges, the attacker could
take control of an affected system. An attacker may also be able to
cause a denial of service.

Appendix A. References

 * Microsoft Security Bulletin MS05-053 -
   <http://www.microsoft.com/technet/security/bulletin/MS05-053.mspx>

 * Microsoft Security Bulletin Summary for November 2005 -
   <http://www.microsoft.com/technet/security/bulletin/ms05-nov.mspx>

 * US-CERT Vulnerability Note VU#300549 -
   <http://www.kb.cert.org/vuls/id/300549>

 * US-CERT Vulnerability Note VU#433341 -
   <http://www.kb.cert.org/vuls/id/433341>

 * US-CERT Vulnerability Note VU#134756 -
   <http://www.kb.cert.org/vuls/id/134756>

 * Microsoft Update - <https://update.microsoft.com/microsoftupdate>

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The most recent version of this document can be found at:

<http://www.us-cert.gov/cas/techalerts/TA05-312A.html&gt;

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Feedback can be directed to US-CERT. Please send email to:
<[email protected]> with "TA05-312A Feedback VU#300549" in the subject.

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Revision History

Nov 08, 2005: Initial release

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Produced 2005 by US-CERT, a government organization.

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