Ubuntu Update for dovecot vulnerabilities USN-593-1

Ubuntu Update for Linux kernel vulnerabilities USN-593-1
Please Install the Updated Packages.
It was discovered that the default configuration of dovecot could allow access to any email files with group &quot mail&quot without verifying that a user had valid rights. An attacker able to create symlinks in their mail directory could exploit this to read or delete another user's email. (CVE-2008-1199) By default, dovecot passed special characters to the underlying authentication systems. While Ubuntu releases of dovecot are not known to be vulnerable, the authentication routine was proactively improved to avoid potential future problems. (CVE-2008-1218)
dovecot vulnerabilities on Ubuntu 6.06 LTS , Ubuntu 6.10 , Ubuntu 7.04 , Ubuntu 7.10