========================================================================== Ubuntu Security Notice USN-4110-3 August 28, 2019
Dovecot regression ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 19.04 - Ubuntu 18.04 LTS - Ubuntu 16.04 LTS Summary: USN-4110-1 introduced a regression in Dovecot. Software Description: - dovecot: IMAP and POP3 email server Details: USN-4110-1 fixed a vulnerability in Dovecot. The update introduced a regression causing a wrong check. This update fixes the problem. We apologize for the inconvenience. Original advisory details: Nick Roessler and Rafi Rubin discovered that Dovecot incorrectly handled certain data. An attacker could possibly use this issue to cause a denial of service or execute arbitrary code. Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 19.04: dovecot-core 1:2.3.4.1-1ubuntu2.4 Ubuntu 18.04 LTS: dovecot-core 1:2.2.33.2-1ubuntu4.5 Ubuntu 16.04 LTS: dovecot-core 1:2.2.22-1ubuntu2.12 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/4110-3 https://usn.ubuntu.com/4110-1 CVE-2019-11500 Package Information: https://launchpad.net/ubuntu/+source/dovecot/1:2.3.4.1-1ubuntu2.4 https://launchpad.net/ubuntu/+source/dovecot/1:2.2.33.2-1ubuntu4.5 https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.12
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