USN-1221-1: Mutt vulnerability

Releases

• Ubuntu 11.04
• Ubuntu 10.10
• Ubuntu 10.04

Packages

• mutt - text-based mailreader supporting MIME, GPG, PGP and threading

Details

It was discovered that mutt incorrectly verified the hostname in an SSL
certificate. An attacker could trick mutt into trusting a rogue SMTPS,
IMAPS, or POP3S server's certificate, which was signed by a trusted certificate
authority, to perform a machine-in-the-middle attack.

Update instructions

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

Ubuntu 11.04

• mutt - 1.5.21-2ubuntu3.1
• mutt-patched - 1.5.21-2ubuntu3.1

Ubuntu 10.10

• mutt - 1.5.20-9ubuntu2.1
• mutt-patched - 1.5.20-9ubuntu2.1

Ubuntu 10.04

• mutt - 1.5.20-7ubuntu1.1
• mutt-patched - 1.5.20-7ubuntu1.1

After a standard system update you need to restart mutt to make
all the necessary changes. Users are encouraged to verify their
~/.mutt_certificates file to ensure only trusted certificates are listed.

References

• CVE-2011-1429