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From: Marc Deslauriers <marc.deslauriers@canonical.com>
Reply-To: Ubuntu Security <security@ubuntu.com>
To: "ubuntu-security-announce@lists.ubuntu.com"
 <ubuntu-security-announce@lists.ubuntu.com>
Message-ID: <9e96f8ff-614a-5d92-7a3f-5b84160beafa@canonical.com>
Subject: [USN-3951-1] Dovecot vulnerability

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==========================================================================
Ubuntu Security Notice USN-3951-1
April 23, 2019

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

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

- Ubuntu 19.04
- Ubuntu 18.10

Summary:

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

Software Description:
- dovecot: IMAP and POP3 email server

Details:

It was discovered that the Dovecot JSON encoder incorrectly handled certain
invalid UTF-8 characters. A remote attacker could possibly use this issue
to cause Dovecot to repeatedly crash, resulting in a denial of service.

Update instructions:

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

Ubuntu 19.04:
  dovecot-core                    1:2.3.4.1-1ubuntu2.1

Ubuntu 18.10:
  dovecot-core                    1:2.3.2.1-1ubuntu3.3

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

References:
  https://usn.ubuntu.com/usn/usn-3951-1
  CVE-2019-10691

Package Information:
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.1
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.3


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