=========================================================================Ubuntu Security Notice USN-2440-1
December 11, 2014

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

- Ubuntu 14.10
- Ubuntu 14.04 LTS
- Ubuntu 12.04 LTS
- Ubuntu 10.04 LTS

Summary:

The mutt mail client could be made to crash if it opened a specially
crafted email.

Software Description:
- mutt: text-based mailreader supporting MIME, GPG, PGP and threading

Details:

Jakub Wilk discovered that the write_one_header function in mutt
did not properly handle newline characters at the beginning of a
header. An attacker could specially craft an email to cause mutt to
crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 14.10:
  mutt                            1.5.23-1.1ubuntu0.2
  mutt-patched                    1.5.23-1.1ubuntu0.2

Ubuntu 14.04 LTS:
  mutt                            1.5.21-6.4ubuntu2.1
  mutt-patched                    1.5.21-6.4ubuntu2.1

Ubuntu 12.04 LTS:
  mutt                            1.5.21-5ubuntu2.2
  mutt-patched                    1.5.21-5ubuntu2.2

Ubuntu 10.04 LTS:
  mutt                            1.5.20-7ubuntu1.3
  mutt-patched                    1.5.20-7ubuntu1.3

After a standard system update you need to restart any running
instances of mutt to make all the necessary changes.

References:
  https://ubuntu.com/security/notices/USN-2440-1
  CVE-2014-9116

Package Information:
  https://launchpad.net/ubuntu/+source/mutt/1.5.23-1.1ubuntu0.2
  https://launchpad.net/ubuntu/+source/mutt/1.5.21-6.4ubuntu2.1
  https://launchpad.net/ubuntu/+source/mutt/1.5.21-5ubuntu2.2
  https://launchpad.net/ubuntu/+source/mutt/1.5.20-7ubuntu1.3