DSA-4130-1 dovecot -- security update

Debian Security Advisory

DSA-4130-1 dovecot -- security update

Date Reported:

02 Mar 2018

Affected Packages:

dovecot

Vulnerable:

Yes

Security database references:

In the Debian bugtracking system: Bug 888432, Bug 891819, Bug 891820.
In Mitre's CVE dictionary: CVE-2017-14461, CVE-2017-15130, CVE-2017-15132.

More information:

Several vulnerabilities have been discovered in the Dovecot email server. The Common Vulnerabilities and Exposures project identifies the following issues:

• CVE-2017-14461

  Aleksandar Nikolic of Cisco Talos and flxflndy discovered that Dovecot does not properly parse invalid email addresses, which may cause a crash or leak memory contents to an attacker.

• CVE-2017-15130

  It was discovered that TLS SNI config lookups may lead to excessive memory usage, causing imap-login/pop3-login VSZ limit to be reached and the process restarted, resulting in a denial of service. Only Dovecot configurations containing local_name { } or local { } configuration blocks are affected.

• CVE-2017-15132

  It was discovered that Dovecot contains a memory leak flaw in the login process on aborted SASL authentication.

For the oldstable distribution (jessie), these problems have been fixed in version 1:2.2.13-12~deb8u4.

For the stable distribution (stretch), these problems have been fixed in version 1:2.2.27-3+deb9u2.

We recommend that you upgrade your dovecot packages.

For the detailed security status of dovecot please refer to its security tracker page at: https://security-tracker.debian.org/tracker/dovecot