– – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – – –
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
—–BEGIN PGP SIGNATURE—–
Version: GnuPG v2.0.22 (GNU/Linux)
Comment: Using GnuPG with Thunderbird – http://www.enigmail.net/
iJwEAQECAAYFAlOrQXQACgkQG9wOWsQutda2qQQAxUnrFUvkgOBqMTElvQrzUxC5
99LAZBujowaQj/hUPMI64hx+5fCSHh/7qHXPvtaDmZYbBSlcS0bGp0G5EZC9OvL2
UMKNuUpA+ykaLcEjsYkykYgtpzyaNe0CdaQdubBYRkJOpIfhsov5uTADa50vmDm9
KnchLqyGarj+YJ8Eb88=
=5AqG
—–END PGP SIGNATURE—–
