[NEWS] Gecko legend object DoS
- From: SecuriTeam <support@xxxxxxxxxxxxxx>
- Date: 18 Apr 2006 12:41:16 +0200
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Gecko legend object DoS
------------------------------------------------------------------------
SUMMARY
Gecko does not handle properly the HTML tags of headers inside legend,
allowing attackers to crash Gecko based browsers.
DETAILS
Vulnerable Systems:
* Mozilla Firefox 1.5.0.1 and prior
* Mozilla Suite 1.0.7 and prior
Immune Systems:
* Mozilla Firefox 1.5.0.2
* Mozilla Suite 1.0.8
A Null Pointer Dereference exists with the way Gecko handles the <legened>
tags.
Proof of Concept:
< legend>
< kbd>
< object>
< h4>
< / object>
< / kbd>
The vulnerability exists with the use of header tag (<h4> on the above
PoC).
Vendor Status:
The vendor has issued a fix with the new Mozilla based products.
Disclosure Timeline:
01 Oct 05 - DoS vulnerability discovered.
15 Dec 05 - Vendor contacted.
15 Dec 05 - Vendor confirmed vulnerability.
02 Feb 06 - Fixed on 1.x branches.
12 Apr 06 - Public release.
ADDITIONAL INFORMATION
The information has been provided by <mailto:bugtraq@xxxxxxxxxxxx> Thomas
Waldegger.
The original article can be found at:
<http://morph3us.org/advisories/20060412-firefox-1501.txt>
http://morph3us.org/advisories/20060412-firefox-1501.txt
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