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Ubuntu Security Notice USN-3928-1

======================================== ==========================================================================
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

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