Fail2ban: Multiple vulnerabilities
Gentoo Linux Security Advisory
||GLSA 201406-03 / fail2ban
||June 01, 2014
||June 01, 2014: 1
All supported architectures
#364883, #473118, #499802
Multiple vulnerabilities have been found in Fail2ban, the worst of
which allows remote attackers to cause a Denial of Service condition.
Fail2ban is a tool for parsing log files and banning IP addresses which
show suspicious behavior.
Multiple vulnerabilities have been discovered in Fail2ban. Please review
the CVE identifiers referenced below for details.
A remote attacker could send a crafted URL to a web site which, when
parsed by Fail2ban, would deny a specific IP address. Also, errors in
regular expressions within certain filters can cause arbitrary IP
addresses to be banned. Furthermore, a local attacker could perform
symlink attacks to overwrite arbitrary files with the privileges of the
user running the application.
There is no known workaround at this time.
All Fail2ban users should upgrade to the latest version:
Code Listing 3.1: Resolution
# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.12