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Vulnerability Note VU#897540

Mozilla products VCard attachment buffer overflow

Overview

Mozilla products fail to properly handle malformed VCard attachments, which allows a buffer overflow to occur. This vulnerability may allow a remote attacker to execute arbitrary code on a vulnerable system.

I. Description

According to Mozilla Foundation Security Advisory 2006-49:

    A VCard attachment with a malformed base64 field (such as a photo) can trigger a heap buffer overwrite. These have proven exploitable in the past, though in this case the overwrite is accompanied by an integer underflow that would attempt to copy more data than the typical machine has, leading to a crash.

For more information and a complete list of affected products, refer to Mozilla Foundation Security Advisory 2006-49.

II. Impact

A remote, unauthenticated attacker may be able to execute arbitrary code on a vulnerable system. The attacker could also cause the vulnerable application to crash.

III. Solution

Apply an update

This vulnerability is addressed in Thunderbird 1.5.0.5 and SeaMonkey 1.0.3 according to the Mozilla Foundation Security Update 2006-49.

Mozilla Foundation Security Advisory 2006-49, suggests the following workarounds:

  • Turn off the inline display of attachments.
  • Do not click on or open VCard attachments.

Systems Affected
VendorStatusDate NotifiedDate Updated
Mozilla, Inc.Vulnerable27-Jul-2006

References


http://www.mozilla.org/security/announce/2006/mfsa2006-49.html
https://bugzilla.mozilla.org/show_bug.cgi?id=339740
http://www.securityfocus.com/bid/19181

Credit

This vulnerability was reported in Mozilla Foundation Security Advisory 2006-49.

This document was written by Jeff Gennari.

Other Information

Date Public:2006-07-25
Date First Published:2006-07-27
Date Last Updated:2007-02-09
CERT Advisory: 
CVE-ID(s):CVE-2006-3804
NVD-ID(s):CVE-2006-3804
US-CERT Technical Alerts: 
Metric:6.15
Document Revision:18

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