Mozilla before 1.7, Firefox before 0.9, and Thunderbird before 0.7, allow remote web sites to install arbitrary extensions by using interactive events to manipulate the XPInstall Security dialog box.
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A4403
https://oval.cisecurity.org/repository/search/definition/oval%3Aorg.mitre.oval%3Adef%3A10032
https://exchange.xforce.ibmcloud.com/vulnerabilities/16623
http://www.squarefree.com/2004/07/01/race-conditions-in-security-dialogs/
http://www.securityfocus.com/bid/15495
http://www.redhat.com/support/errata/RHSA-2004-421.html
http://www.novell.com/linux/security/advisories/2004_36_mozilla.html
http://www.mozilla.org/projects/security/known-vulnerabilities.html#mozilla1.7
http://secunia.com/advisories/11999/
http://marc.info/?l=bugtraq&m=109900315219363&w=2
http://bugzilla.mozilla.org/show_bug.cgi?id=162020
http://archives.neohapsis.com/archives/fulldisclosure/2004-07/0264.html