Bug 973756 (CVE-2013-2178)

Summary:	CVE-2013-2178 fail2ban: remote denial of service due to apache log parsing issue
Product:	[Other] Security Response	Reporter:	Vincent Danen <vdanen>
Component:	vulnerability	Assignee:	Red Hat Product Security <security-response-team>
Status:	CLOSED UPSTREAM	QA Contact:
Severity:	medium	Docs Contact:
Priority:	medium
Version:	unspecified	CC:	admiller, axel.thimm, jlieskov, jonathan.underwood, orion
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
Whiteboard:
Fixed In Version:		Doc Type:	Bug Fix
Doc Text:		Story Points:	---
Clone Of:		Environment:
Last Closed:	2019-06-10 11:00:46 UTC	Type:	---
Regression:	---	Mount Type:	---
Documentation:	---	CRM:
Verified Versions:		Category:	---
oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	973757, 973758
Bug Blocks:

Description Vincent Danen 2013-06-12 15:46:57 UTC

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 15:48:28 UTC

Created fail2ban tracking bugs for this issue

Affects: fedora-all [bug 973757]
Affects: epel-all [bug 973758]

Comment 2 Jan Lieskovsky 2013-06-17 15:34:43 UTC

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 06:15:42 UTC

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 18:50:56 UTC

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.

Comment 5 Product Security DevOps Team 2019-06-10 11:00:46 UTC

This CVE Bugzilla entry is for community support informational purposes only as it does not affect a package in a commercially supported Red Hat product. Refer to the dependent bugs for status of those individual community products.