Bug 973756 - (CVE-2013-2178) CVE-2013-2178 fail2ban: remote denial of service due to apache log parsing issue
CVE-2013-2178 fail2ban: remote denial of service due to apache log parsing issue
Status: NEW
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
medium Severity medium
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Assigned To: Red Hat Product Security
impact=moderate,public=20130608,repor...
: Security
Depends On: 973757 973758
Blocks:
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Reported: 2013-06-12 11:46 EDT by Vincent Danen
Modified: 2015-07-31 03:07 EDT (History)
5 users (show)

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RHEL 7.3 requirements from Atomic Host:


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Description Vincent Danen 2013-06-12 11:46:57 EDT
It was reported [1] that fail2ban improperly parses Apache log files, due to improper regular expressions.  This could allow a remote attacker to send a crafted URL to a web site which, when parsed by fail2ban, would deny a specific IP address (not the remote attacker's IP).

This was reported against fail2ban 0.8.9, but earlier versions use the same regular expression.  This has not yet been addressed upstream; the original report suggests replacement regular expressions, but in my (limited) testing they do not seem to work (testing using fail2ban-regex).


[1] https://vndh.net/note:fail2ban-089-denial-service
Comment 1 Vincent Danen 2013-06-12 11:48:28 EDT
Created fail2ban tracking bugs for this issue

Affects: fedora-all [bug 973757]
Affects: epel-all [bug 973758]
Comment 2 Jan Lieskovsky 2013-06-17 11:34:43 EDT
The CVE identifier of CVE-2013-2178 has been assigned to this issue:
  http://www.openwall.com/lists/oss-security/2013/06/13/7
Comment 3 Fedora Update System 2013-06-28 02:15:42 EDT
fail2ban-0.8.10-1.fc18 has been pushed to the Fedora 18 stable repository.  If problems still persist, please make note of it in this bug report.
Comment 4 Fedora Update System 2013-06-28 14:50:56 EDT
fail2ban-0.8.10-1.el6 has been pushed to the Fedora EPEL 6 stable repository.  If problems still persist, please make note of it in this bug report.

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