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Mozilla Firefox JavaScript engine fails to properly handle garbage collection

Vulnerability Note VU#441529

Original Release Date: 2008-04-18 | Last Revised: 2008-04-18


Mozilla Firefox JavaScript engine fails to properly handle garbage collection. This vulnerability result in memory corruption, which in some cases may be exploitable to execute arbitrary code.


Per Mozilla Foundation Security Advisory 2008-20:

Fixes for security problems in the JavaScript engine described in MFSA 2008-15 (CVE-2008-1237) introduced a stability problem, where some users experienced crashes during JavaScript garbage collection. This is being fixed primarily to address stability concerns. We have no demonstration that this particular crash is exploitable but are issuing this advisory because some crashes of this type have been shown to be exploitable in the past.


A remote, unauthenticated attacker may be able to cause a vulnerable version of the Firefox browser to crash.



Users are encouraged to update to Firefox, Thunderbird, or SeaMonkey 1.1.10.

Use NoScript
Using the Mozilla Firefox NoScript extension to whitelist web sites that can run scripts and access installed plugins will mitigate this vulnerability. See the NoScript FAQ for more information.

Vendor Information


Mozilla Affected

Updated:  April 18, 2008



Vendor Statement

We have not received a statement from the vendor.

Vendor Information

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


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This document was written by Ryan Giobbi.

Other Information

CVE IDs: CVE-2008-1380
Date Public: 2008-04-16
Date First Published: 2008-04-18
Date Last Updated: 2008-04-18 18:24 UTC
Document Revision: 8

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