MalwareTeks Blog

Secunia Advisory: SA29526
Release Date: 2008-03-26
Critical: Highly critical

Description:
Some vulnerabilities and weaknesses have been reported in Mozilla Firefox, which can be exploited by malicious people to bypass certain security restrictions, disclose potentially sensitive information, conduct cross-site scripting and phishing attacks, and potentially compromise a user’s system.

1. An unspecified error in the handling of “XPCNativeWrappers” can lead to the execution of arbitrary Javascript code with the user’s privileges via “setTimeout()” calls.

2. Various errors in the handling of Javascript code can be exploited to conduct cross-site scripting attacks or execute arbitrary code.

3. Various errors in the layout engine can be exploited to cause a memory corruption.

4. Various errors in the Javascript engine can be exploited to cause a memory corruption.

Successful exploitation of these vulnerabilities may allow execution of arbitrary code.

5. An error within the handling of HTTP “Referer:” headers sent with requests to URLs containing “Basic Authentication” credentials having an empty username can be exploited to bypass cross-site request forgery protections.

6. The problem is that Firefox offers a previously configured private SSL certificate when establishing connections to webservers requesting SSL Client Authentication. This can potentially be exploited to disclose sensitive information via a malicious webserver.

7. An error in the handling of the “jar:” protocol can be exploited to establish connections to arbitrary ports on the local machine.

8. An error when displaying XUL pop-up windows can be exploited to hide the window’s borders and facilitate phishing attacks.

The vulnerabilities are reported in versions prior to 2.0.0.13.

Solution:
Update to version 2.0.0.13.

Provided and/or discovered by:
1. moz_bug_r_a4
2. moz_bug_r_a4, Boris Zbarsky, and Johnny Stenback
3. Tom Ferris, Seth Spitzer, Martin Wargers, John Daggett, and Mats Palmgren
4. georgi, tgirmann, and Igor Bukanov
5, 7. Gregory Fleischer
6. Peter Brodersen and Alexander Klink
8. Chris Thomas

Original Advisory:
http://www.mozilla.org/security/announce/2008/mfsa2008-14.html
http://www.mozilla.org/security/announce/2008/mfsa2008-15.html
http://www.mozilla.org/security/announce/2008/mfsa2008-16.html
http://www.mozilla.org/security/announce/2008/mfsa2008-17.html
http://www.mozilla.org/security/announce/2008/mfsa2008-18.html
http://www.mozilla.org/security/announce/2008/mfsa2008-19.html

Other References:
SA27311: http://secunia.com/advisories/27311/

Bugtraq ID: 27812
Class: Design Error
Remote: Yes
Local: No
Published: Feb 15 2008 12:00AM
Updated: Feb 15 2008 11:05PM
Credit: carl hardwick is credited with the discovery of this issue.

Mozilla Firefox is prone to a remote denial-of-service vulnerability because of the way the browser handles IFrames.

Attackers can exploit this issue to make the browser unresponsive and cause denial-of-service conditions.

Firefox 2.0.0.12 is vulnerable; other versions may also be affected.