=========================================================== Ubuntu Security Notice USN-443-1 March 27, 2007 firefox vulnerability CVE-2007-1562 =========================================================== A security issue affects the following Ubuntu releases: Ubuntu 5.10 Ubuntu 6.06 LTS Ubuntu 6.10 This advisory also applies to the corresponding versions of Kubuntu, Edubuntu, and Xubuntu. The problem can be corrected by upgrading your system to the following package versions: Ubuntu 5.10: firefox 1.5.dfsg+1.5.0.11-0ubuntu0.5.10.1 Ubuntu 6.06 LTS: firefox 1.5.dfsg+1.5.0.11-0ubuntu0.6.06.1 Ubuntu 6.10: firefox 2.0.0.3+0dfsg-0ubuntu0.6.10 After a standard system upgrade you need to restart Firefox or reboot your computer to effect the necessary changes. Details follow: A flaw was discovered in how Firefox handled PASV FTP responses. If a user were tricked into visiting a malicious FTP server, a remote attacker could perform a port-scan of machines within the user's network, leading to private information disclosure.