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Date: Wed, 12 Jun 2013 22:00:52 +0200
From: Yves-Alexis Perez <>
Subject: Re: Fail2ban 0.8.9, Denial of Service (Apache rules only)

Can someone assign a CVE for this fail2ban issue?

On sam., 2013-06-08 at 07:44 +0200, Krzysztof Katowicz-Kowalewski wrote:
> Version 0.8.9 (latest) of Fail2ban allows to perform remote denial of
> service for arbitrary chosen IP address. Address listed on Fail2ban's
> whitelist are not affected. The vulnerability exists in Apache rules
> and it is caused by improper validation of a log file by regular
> expression. Malicious user can easily inject his own data to analyzed
> logs and deceive monitoring engine.
> Affected files:
> /filter.d/apache-auth.conf
> /filter.d/apache-nohome.conf
> /filter.d/apache-noscript.conf
> /filter.d/apache-overflows.conf
> Time frames:
> 01.06.2013 - Cyril Jaquier (contact section) has been informed about the vulnerability (no response)
> 08.06.2013 - The vulnerability has been released to the public.
> More information, including proof of concept and patches is available here:

Thanks in advance,

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