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Date: Sun, 05 Apr 2009 15:56:49 +0200
From: Pierre-Yves Rofes <py@gentoo.org.>
To: gentoo-announce@gentoo.org
Subject: [ GLSA 200904-05 ] ntp: Certificate validation error
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Gentoo Linux Security Advisory GLSA 200904-05
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http://security.gentoo.org/
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Severity: Normal
Title: ntp: Certificate validation error
Date: April 05, 2009
Bugs: #254098
ID: 200904-05
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Synopsis
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An error in the OpenSSL certificate chain validation in ntp might allow
for spoofing attacks.
Background
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ntp contains the client and daemon implementations for the Network Time
Protocol.
Affected packages
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Package / Vulnerable / Unaffected
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1 net-misc/ntp < 4.2.4_p6 >=3D 4.2.4_p6
Description
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It has been reported that ntp incorrectly checks the return value of
the EVP_VerifyFinal(), a vulnerability related to CVE-2008-5077 (GLSA
200902-02).
Impact
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A remote attacker could exploit this vulnerability to spoof arbitrary
names to conduct Man-In-The-Middle attacks and intercept sensitive
information.
Workaround
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There is no known workaround at this time.
Resolution
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All ntp users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose ">=3Dnet-misc/ntp-4.2.4_p6"
References
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[ 1 ] CVE-2008-5077
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2008-5077
[ 2 ] CVE-2009-0021
http://cve.mitre.org/cgi-bin/cvename.cgi?name=3DCVE-2009-0021
[ 3 ] GLSA 200902-02
http://www.gentoo.org/security/en/glsa/glsa-200902-02.xml
Availability
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This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200904-05.xml
Concerns?
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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
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Copyright 2009 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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