Debian Security Advisory DSA 4130-1 (dovecot - security update)

Several vulnerabilities have been discovered in the Dovecot email server. The Common Vulnerabilities and Exposures project identifies the following issues: CVE-2017-14461Aleksandar 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-2017-15130It 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.

dovecot on Debian Linux

This check tests the installed software version using the apt package manager.

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 linked in the references.