=========================================================================Ubuntu Security Notice USN-2213-1
May 15, 2014

dovecot vulnerability
=========================================================================
A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 14.04 LTS
- Ubuntu 13.10
- Ubuntu 12.10
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

Dovecot could be made to stop responding if it received specially crafted
network traffic.

Software Description:
- dovecot: IMAP and POP3 email server

Details:

It was discovered that Dovecot incorrectly handled closing inactive SSL/TLS
connections. A remote attacker could use this issue to cause Dovecot to
stop responding to new connections, resulting in a denial of service.

Update instructions:

The problem can be corrected by updating your system to the following
package versions:

Ubuntu 14.04 LTS:
  dovecot-core                    1:2.2.9-1ubuntu2.1
  dovecot-imapd                   1:2.2.9-1ubuntu2.1
  dovecot-pop3d                   1:2.2.9-1ubuntu2.1

Ubuntu 13.10:
  dovecot-core                    1:2.1.7-7ubuntu3.1
  dovecot-imapd                   1:2.1.7-7ubuntu3.1
  dovecot-pop3d                   1:2.1.7-7ubuntu3.1

Ubuntu 12.10:
  dovecot-core                    1:2.1.7-1ubuntu2.1
  dovecot-imapd                   1:2.1.7-1ubuntu2.1
  dovecot-pop3d                   1:2.1.7-1ubuntu2.1

Ubuntu 12.04 LTS:
  dovecot-core                    1:2.0.19-0ubuntu2.1
  dovecot-imapd                   1:2.0.19-0ubuntu2.1
  dovecot-pop3d                   1:2.0.19-0ubuntu2.1

Ubuntu 10.04 LTS:
  dovecot-imapd                   1:1.2.9-1ubuntu6.6
  dovecot-pop3d                   1:1.2.9-1ubuntu6.6

In general, a standard system update will make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2213-1
  CVE-2014-3430

Package Information:
  https://launchpad.net/ubuntu/+source/dovecot/1:2.2.9-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.1.7-7ubuntu3.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.1.7-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.0.19-0ubuntu2.1
  https://launchpad.net/ubuntu/+source/dovecot/1:1.2.9-1ubuntu6.6