Mozilla · Firefox · CVE-2009-3978
**Name of the Vulnerable Software and Affected Versions**
Mozilla Firefox versions prior to 3.5.5
**Description**
The issue allows remote attackers to cause a denial of service, resulting in a NULL pointer dereference and application crash, via an animated GIF file with a large image size.
**Recommendations**
For versions prior to 3.5.5, update to version 3.5.5 or later to resolve the issue.