Vulnerability Note VU#915930

Microsoft embedded web font buffer overflow

Overview

A heap-based buffer overflow in the way Microsoft Windows processes embedded web fonts may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

I. Description

Microsoft Windows contains a heap-based buffer overflow in a routine that processes embedded web fonts. The overflow exists due to a lack of validation on compressed embedded web fonts. A remote attacker may be able to trigger the buffer overflow by persuading a user to access a web page or HTML email containing a specially crafted embedded web font.

For more information about affected versions of Microsoft Windows, please refer to MS06-002.

II. Impact

A remote attacker may be able to execute arbitrary code with the privileges of the attacked user account.

III. Solution

Apply an update

Microsoft Security Bulletin MS06-002 contains an update to correct this vulnerability.

In addition Microsoft suggests the following workarounds to mitigate this vulnerability:

Read and send email in plain text format
Configure Font Download to “Prompt or Disable” in the Internet and Local Intranet Zones.

Please see Microsoft Security Bulletin MS06-002 for details on these workarounds.

Systems Affected

Vendor	Status	Date Updated
Microsoft Corporation	Vulnerable	10-Jan-2006

References

http://www.microsoft.com/technet/security/bulletin/ms06-002.mspx
http://www.microsoft.com/typography/web/embedding/

Credit

This vulnerability was reported in Microsoft Security Bulletin MS06-002. Microsoft credits eEye Digital Security with providing information regarding this issue.

This document was written by Jeff Gennari.

Other Information

Date Public	01/10/2006
Date First Published	01/10/2006 03:26:29 PM
Date Last Updated	01/10/2006
CERT Advisory
CVE Name	CVE-2006-0010
US-CERT Technical Alerts
Metric	10.69
Document Revision	24

If you have feedback, comments, or additional information about this vulnerability, please send us email.

Produced 2006 by US-CERT, a government organization
Disclaimers and copyright information

Get Adobe Reader