Technical Description

Multiple vulnerabilities has been identified in Mozilla products, which could be exploited by remote attackers to compromise a vulnerable system.

The first issue is caused by an error in the internal CSSValue array data structure when processing an overly large number of references to a common CSS object, which could allow attackers to execute arbitrary code by tricking a user into visiting a malicious and specially crafted web page.

A second vulnerability is caused by an error when passing a command-line URI with pipe symbols to Firefox, which could be exploited in combination with an input validation error within the handling of XUL based error pages to inject script into a chrome document and execute arbitrary code.

Affected Products

Mozilla Firefox versions prior to 3.0.1
Mozilla Firefox versions prior to 2.0.0.16
Mozilla Thunderbird versions prior to 2.0.0.16
Mozilla SeaMonkey versions prior to 1.1.11

Solution

Upgrade to Mozilla Firefox version 3.0.1 or 2.0.0.16 :
http://www.mozilla.com/firefox/

Upgrade to Mozilla Thunderbird version 2.0.0.16 :
http://www.mozilla.org/projects/seamonkey/

Upgrade to Mozilla SeaMonkey version 1.1.11 :
http://www.mozilla.org/projects/seamonkey/

References

http://www.vupen.com/english/advisories/2008/1873
http://dvlabs.tippingpoint.com/blog/2008/06/18/vulnerability-in-mozilla-firefox-30
http://www.mozilla.org/security/announce/2008/mfsa2008-34.html
http://www.mozilla.org/security/announce/2008/mfsa2008-35.html

Credits

Vulnerabilities reported by ZDI, Billy Rios, Ben Turner and Dan Veditz.

ChangeLog

2008-06-19 : Initial release
2008-07-16 : Updated Description and Solution

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