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Firefox "contentWindow.focus()" Deleted Object Reference Vulnerability
Secunia Advisory: SA19802
Release Date: 2006-04-25
Last Update: 2006-05-03
Popularity: 36,108 views

Critical:
Highly critical
Impact: DoS
System access
Where: From remote
Solution Status: Vendor Patch

Software:Mozilla Firefox 1.x

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CVE reference:CVE-2006-1993


Description:
A vulnerability has been reported in Firefox, which can be exploited by malicious people to cause a DoS (Denial of Service) and potentially compromise a user's system.

The vulnerability is caused due to a reference to a deleted object when designMode is enabled. This can be exploited to corrupt the memory and cause a crash by calling the "contentWindow.focus()" method on a container with specially crafted content.

Successful exploitation may allow execution of arbitrary code.

The vulnerability has been reported in versions 1.5 through 1.5.0.2.

Solution:
Update to version 1.5.0.3.
http://www.mozilla.com/firefox/

Provided and/or discovered by:
Martijn Wargers, Nick Mott, splices, spiffomatic64, and Securident Technologies.

Changelog:
2006-04-26: Added CVE reference and link to Bugzilla entry, and updated "Description" section.
2006-05-03: Added link to US-CERT vulnerability note. The vendor discloses additional details. Updated advisory.

Original Advisory:
http://www.securident.com/vuln/ff.txt
http://www.mozilla.org/security/announce/2006/mfsa2006-30.html

Other References:
https://bugzilla.mozilla.org/show_bug.cgi?id=334515

US-CERT VU#866300:
http://www.kb.cert.org/vuls/id/866300


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