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Mozilla products fail to properly handle JavaScript regular expressions

Vulnerability Note VU#141528

Original Release Date: 2006-09-20 | Last Revised: 2006-10-02

Overview

Mozilla products fail to properly handle certain JavaScript regular expressions. This vulnerability may allow a remote, unauthenticated attacker to execute arbitrary code or cause a denial-of-service condition.

Description

According to Mozilla Foundation Security Advisory 2006-57:

...a regular expression that ends with a backslash inside an unterminated character set (e.g. "[\\") will cause the regular epression engine to read beyond the end of the buffer, possibly leading to a crash.
JavaScript must be enabled in order for this vulnerability to be exposed. JavaScript is enabled by default in the Firefox web browser, but not in the Mozilla Thunderbird email client. This vulnerability could be exploited in an affected web browser by viewing a specially crafted web page, or in an affected email client by viewing a specially crafted email message.

Note that this issue affects Mozilla Firefox, Thunderbird, and SeaMonkey.

Impact

A remote, unauthenticated attacker may be able to execute arbitrary code or cause a denial-of-service condition.

Solution

Upgrade
This issue is addressed by Firefox 1.5.0.7, Thunderbird 1.5.0.7, and SeaMonkey 1.0.5.

Disable JavaScript


For instructions on how to disable JavaScript in Firefox, please refer to the Firefox section of the Securing Your Web Browser document.

Vendor Information

141528
 
Affected   Unknown   Unaffected

Mozilla, Inc.

Updated:  September 18, 2006

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

Refer to http://www.mozilla.org/security/announce/2006/mfsa2006-57.html.

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

SUSE Linux

Updated:  October 02, 2006

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

Refer to http://www.novell.com/linux/security/advisories/2006_55_ssl.html

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 issue was reported in Mozilla Foundation Security Advisory 2006-57. Mozilla credits Priit Laes, CanadianGuy, Girts Folkmanis, and Catalin Patulea for reporting this issue.

This document was written by Chris Taschner.

Other Information

CVE IDs: None
Severity Metric: 27.00
Date Public: 2006-09-15
Date First Published: 2006-09-20
Date Last Updated: 2006-10-02 13:53 UTC
Document Revision: 22

Sponsored by the Department of Homeland Security Office of Cybersecurity and Communications.