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Mozilla Firefox History Information Denial of Service Weakness
Secunia Advisory: SA17934
Release Date: 2005-12-08
Last Update: 2006-04-14
Popularity: 34,102 views

Critical:
Not critical
Impact: DoS
Where: From remote
Solution Status: Vendor Patch

Software:Mozilla Firefox 1.x

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CVE reference:CVE-2005-4134


Description:
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.
http://www.mozilla.com/firefox/

Provided and/or discovered by:
ZIPLOCK

Changelog:
2005-12-09: Added link to vendor advisory and updated "Solution" section.
2005-12-14: Added CVE reference.
2006-02-02: Updated "Solution" section and added links to vendor advisories.
2006-04-14: Updated "Solution" section.

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


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