Secunia

ZIPLOCK has discovered a weakness in Mozilla Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service).

The weakness is caused due to an error in the handling of large history information. This can be exploited to fill the history file "history.dat" with large history information by tricking a user into visiting a malicious web site with an overly large title (e.g. set via JavaScript).

Successful exploitation causes the browser to consume a large amount of CPU and memory resources on a vulnerable system when the affected browser is started up again after an attack. Users may have to remove the "history.dat" file in order to be able to use the affected browser.

The weakness has been confirmed in version 1.5. Other versions may also be affected.

Solution
Update to versions 1.0.8 or 1.5.0.1.
Further details available in Customer Area

Provided and/or discovered by
ZIPLOCK

Changelog
Further details available in Customer Area

Original Advisory
Mozilla:
http://www.mozilla.org/security/history-title.html
http://www.mozilla.org/security/announce/mfsa2006-03.html

Deep Links
Links available in Customer Area