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Mozilla Thunderbird external-body MIME type buffer overflow

Vulnerability Note VU#661651

Original Release Date: 2008-03-06 | Last Revised: 2008-03-06

Overview

Mozilla Thunderbird contains a heap-based buffer overflow which may allow a remote, unauthenticated attacker to execute arbitrary code on a vulnerable system.

Description

Mozilla Thunderbird is an open source, cross-platform email and news client. Thunderbird uses Multipurpose Internet Message Extensions (MIME) which extends support in Thunderbird for multi-part message bodies, non-text attachments, and non-ASCII character sets. A vulnerability exists in the way Mozilla Thunderbird parses external-body MIME type in an electronic mail which may result in a heap-based buffer overflow. According to Mozilla Foundation Security Advisory 2008-12:

The vulnerability is caused by allocating a buffer that can be three bytes too small in certain cases when viewing an email message with an external MIME body.

Impact

A remote, unauthenticated attacker may be able to execute arbitrary code on a system running a vulnerable version of Mozilla Thunderbird.

Solution

Apply Update


Mozilla has has addressed this vulnerability in version 2.0.0.12. For further information regarding this vulnerability, Mozilla has published MFSA-2008-12.

Apply Workaround


As stated directly from MFSA-2008-12:

Users can prevent the vulnerable code from being triggered by setting the "mailnews.display.disallow_mime_handlers" property to any value greater than or equal to 3.

Vendor Information

661651
 
Affected   Unknown   Unaffected

Mozilla

Updated:  March 06, 2008

Status

  Vulnerable

Vendor Statement

No statement is currently available from the vendor regarding this vulnerability.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Mozilla has has addressed this vulnerability in version 2.0.0.12. For further information regarding this vulnerability, Mozilla has published MFSA-2008-12.

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


CVSS Metrics

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A

References

Acknowledgements

This vulnerability was reported to VeriSign iDefense by regenrecht.

This document was written by Joseph W. Pruszynski.

Other Information

CVE IDs: CVE-2008-0304
Severity Metric: 31.00
Date Public: 2008-02-26
Date First Published: 2008-03-06
Date Last Updated: 2008-03-06 13:45 UTC
Document Revision: 23

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