=========================================================================Ubuntu Security Notice USN-3961-1
April 30, 2019

dovecot vulnerabilities
=========================================================================
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 Submission login service incorrectly
handled certain operations. A remote attacker could possibly use this issue
to cause Dovecot 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 19.04:
  dovecot-core                    1:2.3.4.1-1ubuntu2.2
  dovecot-submissiond             1:2.3.4.1-1ubuntu2.2

Ubuntu 18.10:
  dovecot-core                    1:2.3.2.1-1ubuntu3.4
  dovecot-submissiond             1:2.3.2.1-1ubuntu3.4

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

References:
  https://ubuntu.com/security/notices/USN-3961-1
  CVE-2019-11494, CVE-2019-11499

Package Information:
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.2
  https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.4

Ubuntu 3961-1: Dovecot vulnerabilities

April 30, 2019
Dovecot could be made to crash if it received specially crafted network traffic.

Summary

Update Instructions

The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: dovecot-core 1:2.3.4.1-1ubuntu2.2 dovecot-submissiond 1:2.3.4.1-1ubuntu2.2 Ubuntu 18.10: dovecot-core 1:2.3.2.1-1ubuntu3.4 dovecot-submissiond 1:2.3.2.1-1ubuntu3.4 In general, a standard system update will make all the necessary changes.

References

https://ubuntu.com/security/notices/USN-3961-1

CVE-2019-11494, CVE-2019-11499

Severity
April 30, 2019

Package Information

https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.2 https://launchpad.net/ubuntu/+source/dovecot/1:2.3.2.1-1ubuntu3.4

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