Privilege escalation using a JavaScript function's cloned parent shutdown discovered it was possible to use the Object.watch() method to access an internal function object (the "clone parent") which could then be used to run arbitrary JavaScript code with full permission. This could be used to install malware such as password sniffers or viruses. In pre-release versions of Firefox 1.5 the same technique could be applied to the Array generic methods introduced in that release. Note: Thunderbird shares the JavaScript engine with Firefox and could be vulnerable if JavaScript were to be enabled in mail. This is not the default setting and we strongly discourage users from running JavaScript in mail. Workaround Disable JavaScript until you can upgrade to a fixed version. References [1]https://bugzilla.mozilla.org/show_bug.cgi?id=313370 [2]https://bugzilla.mozilla.org/show_bug.cgi?id=313684 This issue also affects FC4
Lifting embargo
This bug was fixed for FC4 in Fedora Update FEDORA-2006-488 <http://www.redhat.com/archives/fedora-package-announce/2006-May/msg00019.html>. This bug was fixed for FC5 in Fedora Update FEDORA-2006-487 <http://www.redhat.com/archives/fedora-package-announce/2006-May/msg00018.html>.