The remote host is missing an update to the system as announced in the referenced advisory.

Update your system with the appropriate patches or software upgrades. http://bugzilla.mozilla.org/show_bug.cgi?id=162020 http://www.vuxml.org/freebsd/a7e0d783-131b-11d9-bc4a-000c41e2cdad.html

The following packages are affected: thunderbird de-linux-mozillafirebird el-linux-mozillafirebird firefox ja-linux-mozillafirebird-gtk1 ja-mozillafirebird-gtk2 linux-mozillafirebird ru-linux-mozillafirebird zhCN-linux-mozillafirebird zhTW-linux-mozillafirebird de-netscape7 fr-netscape7 ja-netscape7 netscape7 pt_BR-netscape7 mozilla-gtk1 linux-mozilla linux-mozilla-devel mozilla de-linux-netscape fr-linux-netscape ja-linux-netscape linux-netscape linux-phoenix mozilla+ipv6 mozilla-embedded mozilla-firebird mozilla-gtk2 mozilla-gtk mozilla-thunderbird phoenix CVE-2004-0762 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.