USN-3556-2: Dovecot vulnerabilities

Ubuntu Security Notice USN-3556-2

1st February, 2018

dovecot vulnerabilities

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

  • Ubuntu 12.04 LTS

Summary

Several security issues were fixed in Dovecot.

Software description

  • dovecot - IMAP and POP3 email server

Details

USN-3556-1 fixed vulnerabilities in Dovecot. This update
provides the corresponding update for Ubuntu 12.04 ESM.

It was discovered that Dovecot incorrectly handled certain authentications.
An attacker could possibly use this to bypass authentication and access
sensitive information. (CVE-2013-6171)

Original advisory details:

It was discovered that Dovecot incorrectly handled certain authentications.
An attacker could possibly use this to cause a denial of service. (CVE-2017-15132)

Update instructions

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

Ubuntu 12.04 LTS:
dovecot-core 1:2.0.19-0ubuntu2.4

To update your system, please follow these instructions: https://wiki.ubuntu.com/Security/Upgrades.

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

References

CVE-2013-6171, CVE-2017-15132