Postfix: Multiple vulnerabilities

Background

Postfix is Wietse Venema’s mailer that attempts to be fast, easy to administer, and secure, as an alternative to the widely-used Sendmail program.

Description

A vulnerability have been discovered in Postfix. Please review the CVE identifier referenced below for details.

Impact

An attacker could perform a man-in-the-middle attack and inject SMTP commands during the plaintext to TLS session switch or might execute arbitrary code.

Workaround

There is no known workaround at this time.

Resolution

All Postfix users should upgrade to the latest version:

 # emerge --sync
 # emerge --ask --oneshot --verbose ">=mail-mta/postfix-2.7.4"