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Gentoo alert 201406-23 (denyhosts)

From:  Mikle Kolyada <zlogene@gentoo.org>
To:  gentoo-announce@gentoo.org
Subject:  [gentoo-announce] [ GLSA 201406-23 ] DenyHosts: Denial of Service
Date:  Thu, 26 Jun 2014 01:38:50 +0400
Message-ID:  <53AB416A.1090209@gentoo.org>

- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 201406-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - http://security.gentoo.org/ - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Severity: Normal Title: DenyHosts: Denial of Service Date: June 25, 2014 Bugs: #495130 ID: 201406-23 - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Synopsis ======== A vulnerability in DenyHosts could allow a remote attacker to create a Denial of Service condition. Background ========== DenyHosts is a script intended to be run by Linux system administrators to help thwart SSH server attacks. Affected packages ================= ------------------------------------------------------------------- Package / Vulnerable / Unaffected ------------------------------------------------------------------- 1 app-admin/denyhosts < 2.6-r9 >= 2.6-r9 Description =========== DenyHosts does not properly define the regular expressions used when parsing SSH authentication logs. Impact ====== A remote attacker could possibly cause a Denial of Service condition via a crafted login name. Workaround ========== There is no known workaround at this time. Resolution ========== All DenyHost users should upgrade to the latest version: # emerge --sync # emerge --ask --oneshot --verbose ">=app-admin/denyhosts-2.6-r9" References ========== [ 1 ] CVE-2013-6890 http://nvd.nist.gov/nvd.cfm?cvename=CVE-2013-6890 Availability ============ This GLSA and any updates to it are available for viewing at the Gentoo Security Website: http://security.gentoo.org/glsa/glsa-201406-23.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 https://bugs.gentoo.org. License ======= Copyright 2014 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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