========================================================================== Ubuntu Security Notice USN-3587-2 April 02, 2018 dovecot vulnerabilities ========================================================================== A security issue affects these releases of Ubuntu and its derivatives: - Ubuntu 12.04 ESM Summary: Several security issues were fixed in Dovecot. Software Description: - dovecot: IMAP and POP3 email server Details: USN-3587-1 fixed a vulnerability in Dovecot. This update provides the corresponding update for Ubuntu 12.04 ESM. Original advisory details: It was discovered that Dovecot incorrectly handled parsing certain email addresses. A remote attacker could use this issue to cause Dovecot to crash, resulting in a denial of service, or possibly obtain sensitive information. (CVE-2017-14461) It was discovered that Dovecot incorrectly handled TLS SNI config lookups. A remote attacker could possibly use this issue to cause Dovecot to crash, resulting in a denial of service. (CVE-2017-15130) Update instructions: The problem can be corrected by updating your system to the following package versions: Ubuntu 12.04 ESM: dovecot-core 1:2.0.19-0ubuntu2.5 In general, a standard system update will make all the necessary changes. References: https://usn.ubuntu.com/usn/usn-3587-2 https://usn.ubuntu.com/usn/usn-3587-1 CVE-2017-14461, CVE-2017-15130