Debian Security Advisory

DLA-0021-1 fail2ban -- LTS security update

Date Reported:
26 Jul 2014
Affected Packages:
Security database references:
In Mitre's CVE dictionary: CVE-2013-7176, CVE-2013-7177.
More information:
  • Use anchored failregex for filters to avoid possible DoS. Manually picked up from the current status of 0.8 branch (as of 0.8.13-29-g09b2016):
    • CVE-2013-7176: postfix.conf - anchored on the front, expects "postfix/smtpd" prefix in the log line
    • CVE-2013-7177: cyrus-imap.conf - anchored on the front, and refactored to have a single failregex
    • couriersmtp.conf - anchored on both sides
    • exim.conf - front-anchored versions picked up from exim.conf and exim-spam.conf
    • lighttpd-fastcgi.conf - front-anchored picked up from suhosin.conf (copied from the Wheezy version)
  • Catch also failed logins via secured (imaps/pop3s) for cyrus-imap. Regression was introduced while strengthening failregex in 0.8.11 (bd175f) Debian bug #755173
  • cyrus-imap: catch user not found attempts

For Debian 6 Squeeze, these issues have been fixed in fail2ban version 0.8.4-3+squeeze3