Joined: 12 May 2004
|Posted: Sat Jul 28, 2007 11:26 pm Post subject: [ GLSA 200707-13 ] Fail2ban: Denial of Service
|Gentoo Linux Security Advisory
Title: Fail2ban: Denial of Service (GLSA 200707-13)
Date: July 28, 2007
Updated: January 09, 2008
Fail2ban is vulnerable to a Denial of Service attack.
Fail2ban is a tool for parsing log files and banning IP addresses which make too many password failures.
Vulnerable: < 0.8.0-r1
Unaffected: >= 0.8.0-r1
Architectures: All supported architectures
A vulnerability has been discovered in Fail2ban when parsing log files.
A remote attacker could send specially crafted SSH login banners to the vulnerable host, which would prevent any ssh connection to the host and result in a Denial of Service.
There is no known workaround at this time.
All Fail2ban users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.8.0-r1"
Last edited by GLSA on Thu Jan 10, 2008 4:19 am; edited 1 time in total