Ubuntu Update for Linux kernel vulnerabilities USN-666-1
Please Install the Updated Packages.
It was discovered that certain email headers were not correctly handled by Dovecot. If a remote attacker sent a specially crafted email to a user with a mailbox managed by Dovecot, that user's mailbox would become inaccessible through Dovecot, leading to a denial of service.
dovecot vulnerability on Ubuntu 8.10
Updated on 2015-03-25