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Mozilla Firefox: Multiple vulnerabilities


1.  Gentoo Linux Security Advisory

Version Information

Advisory Reference GLSA 200503-31 / Firefox
Release Date March 25, 2005
Latest Revision March 25, 2005: 01
Impact normal
Exploitable remote
Package Vulnerable versions Unaffected versions Architecture(s)
www-client/mozilla-firefox < 1.0.2 >= 1.0.2 All supported architectures
www-client/mozilla-firefox-bin < 1.0.2 >= 1.0.2 All supported architectures

Related bugreports: #86148


Mozilla Firefox 1.0.2 fixes new security vulnerabilities, including the remote execution of arbitrary code through malicious GIF images or sidebars.

2.  Impact Information


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


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)


  • 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

3.  Resolution Information


There is no known workaround at this time.


All Mozilla Firefox users should upgrade to the latest version:

Code Listing 3.1: Resolution

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

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

Code Listing 3.2: Resolution

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

4.  References


Page updated March 25, 2005

Summary: This is a Gentoo Linux Security Advisory

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