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Gentoo alert 200702-05 (fail2ban)

From:  Raphael Marichez <falco@gentoo.org>
To:  gentoo-announce@gentoo.org
Subject:  [gentoo-announce] [ GLSA 200702-05 ] Fail2ban: Denial of Service
Date:  Fri, 16 Feb 2007 01:39:27 +0100
Cc:  bugtraq@securityfocus.com, full-disclosure@lists.grok.org.uk, security-alerts@linuxsecurity.com

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200702-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: Fail2ban: Denial of Service Date: February 16, 2007 Bugs: #157166 ID: 200702-05 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A flaw in Fail2ban may allow remote attackers to deny access to arbitrary hosts. Background ========== Fail2ban monitors log files for failed authentication attempts and can block hosts responsible for repeated attacks. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 net-analyzer/fail2ban < 0.6.2 >= 0.6.2 Description =========== A flaw in the method used to parse log entries allows remote, unauthenticated attackers to forge authentication attempts from other hosts. Impact ====== A remote attacker can add arbitrary hosts to the block list, denying legitimate users access to a resource. Workaround ========== There is no known workaround at this time. Resolution ========== All Fail2ban users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=net-analyzer/fail2ban-0.6.2" References ========== [ 1 ] CVE-2006-6302 http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6302 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-200702-05.xml Concerns? ========= Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org. License ======= Copyright 2007 Gentoo Foundation, Inc; referenced text belongs to its owner(s). The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license. http://creativecommons.org/licenses/by-sa/2.5


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