==========================================================================
Ubuntu Security Notice USN-3587-1
March 05, 2018
dovecot vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
– Ubuntu 17.10
– Ubuntu 16.04 LTS
– Ubuntu 14.04 LTS
Summary:
Several security issues were fixed in Dovecot.
Software Description:
– dovecot: IMAP and POP3 email server
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 17.10:
dovecot-core 1:2.2.27-3ubuntu1.3
Ubuntu 16.04 LTS:
dovecot-core 1:2.2.22-1ubuntu2.7
Ubuntu 14.04 LTS:
dovecot-core 1:2.2.9-1ubuntu2.4
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/usn/usn-3587-1
CVE-2017-14461, CVE-2017-15130
Package Information:
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.27-3ubuntu1.3
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.22-1ubuntu2.7
https://launchpad.net/ubuntu/+source/dovecot/1:2.2.9-1ubuntu2.4
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