From: Secunia Security Advisories (sec-advsecunia.com)
Date: Wed Feb 11 2009 - 10:24:05 CST

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TITLE:
Fail2ban "wuftpd.conf" Denial of Service Vulnerability

SECUNIA ADVISORY ID:
SA33890

VERIFY ADVISORY:
http://secunia.com/advisories/33890/

CRITICAL:
Less critical

IMPACT:
DoS

WHERE:
From remote

SOFTWARE:
Fail2ban 0.x
http://secunia.com/advisories/product/12833/

DESCRIPTION:
A vulnerability has been reported in Fail2ban, which can be exploited
by malicious people to cause a DoS (Denial of Service).

The vulnerability is caused due to an incorrect regular expression
included in the filter.d/wuftpd.conf file. This can be exploited to
ban legitimate users by making multiple invalid authentication
requests from a specially crafted hostname.

SOLUTION:
Remove the affected wuftpd.conf file.

PROVIDED AND/OR DISCOVERED BY:
Reported by Chris Butler in a Debian bug report.

ORIGINAL ADVISORY:
http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=514163

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