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If through a vulnerability assessment, a network security issue is detected for the vulnerability below, applying the appropriate security patches in a timely matter is very important. If you have detected that your system has already been compromised, following CERT's Network Security recovery document will assist with recommended steps for system recovery.
Vulnerability Assessment Details
Mozilla Firefox: Multiple vulnerabilities
Detailed Explanation for this Vulnerability Assessment
The remote host is affected by the vulnerability described in GLSA-200503-31
(Mozilla Firefox: Multiple vulnerabilities)
The following vulnerabilities were found and fixed in Mozilla
Mark Dowd from ISS X-Force reported an
exploitable heap overrun in the GIF processing of obsolete Netscape
extension 2 (CVE-2005-0399)
Kohei Yoshino discovered that a
page bookmarked as a sidebar could bypass rights control
Michael Krax reported a new way to bypass XUL
security restrictions through drag-and-drop of items like scrollbars
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
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
There is no known workaround at this time.
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
# emerge --sync
# emerge --ask --oneshot --verbose ">=www-client/mozilla-firefox-bin-1.0.2"
Network Security Threat Level: Medium
Networks Security ID:
Vulnerability Assessment Copyright: (C) 2005 Michel Arboi
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