[USN-3928-1] Dovecot vulnerability

-----BEGIN PGP SIGNATURE-----
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=Qn0o
-----END PGP SIGNATURE-----
==========================================================================
Ubuntu Security Notice USN-3928-1
April 01, 2019

dovecot vulnerability
==========================================================================

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

- Ubuntu 18.10
- Ubuntu 18.04 LTS
- Ubuntu 16.04 LTS
- Ubuntu 14.04 LTS

Summary:

Dovecot could be made to crash or run programs as an administrator
if it opened a specially crafted file.

Software Description:
- dovecot: IMAP and POP3 email server

Details:

It was discovered that Dovecot incorrectly handled reading certain headers
from the index. A local attacker could possibly use this issue to escalate
privileges.

Update instructions:

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

Ubuntu 18.10:
dovecot-core 1:2.3.2.1-1ubuntu3.2

Ubuntu 18.04 LTS:
dovecot-core 1:2.2.33.2-1ubuntu4.3

Ubuntu 16.04 LTS:
dovecot-core 1:2.2.22-1ubuntu2.10

Ubuntu 14.04 LTS:
dovecot-core 1:2.2.9-1ubuntu2.6

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

References:
https://usn.ubuntu.com/usn/usn-3928-1
CVE-2019-7524

Package Information:
https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.2
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.33.2-1ubuntu4.3
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.10
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.9-1ubuntu2.6