Mozilla Firefox: Multiple vulnerabilities

Background

Mozilla Firefox is the popular next-generation browser from the Mozilla project.

Description

The following vulnerabilities were found and fixed in Mozilla Firefox:

• Mark Dowd from ISS X-Force reported an exploitable heap overrun in the GIF processing of obsolete Netscape extension 2 (CAN-2005-0399)
• Kohei Yoshino discovered that a page bookmarked as a sidebar could bypass privileges control (CAN-2005-0402)
• Michael Krax reported a new way to bypass XUL security restrictions through drag-and-drop of items like scrollbars (CAN-2005-0401)

Impact

• The GIF heap overflow could be triggered by a malicious GIF image that would end up executing arbitrary code with the rights of the user running Firefox
• By tricking the user into bookmarking a malicious page as a Sidebar, a remote attacker could potentially execute arbitrary code with the rights of the user running the browser
• By setting up a malicious website and convincing users to obey very specific drag-and-drop instructions, attackers may leverage drag-and-drop features to bypass XUL security restrictions, which could be used as a stepping stone to exploit other vulnerabilities

Workaround

There is no known workaround at this time.

Resolution

All Mozilla Firefox users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-client/mozilla-firefox-1.0.2"

All Mozilla Firefox binary users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=www-client/mozilla-firefox-bin-1.0.2"