Debian: DSA-4130-1: dovecot security update
Summary
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/source-package/dovecot
Further information about Debian Security Advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://www.debian.org/security/
Mailing list: debian-security-announce@lists.debian.org