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[gentoo-announce] [ GLSA 200904-05 ] ntp: Certificate validation error

Posted on 05 April 2009
Gentoo-announce

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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
========
An error in the OpenSSL certificate chain validation in ntp might allow
for spoofing attacks.

Background
==========
ntp contains the client and daemon implementations for the Network Time
Protocol.

Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 net-misc/ntp < 4.2.4_p6 >= 4.2.4_p6

Description
===========
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
======
A remote attacker could exploit this vulnerability to spoof arbitrary
names to conduct Man-In-The-Middle attacks and intercept sensitive
information.

Workaround
==========
There is no known workaround at this time.

Resolution
==========
All ntp users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/ntp-4.2.4_p6"

References
==========
[ 1 ] CVE-2008-5077
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-5077
[ 2 ] CVE-2009-0021
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2009-0021
[ 3 ] GLSA 200902-02
http://www.gentoo.org/security/en/glsa/glsa-200902-02.xml

Availability
============
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?
=========
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 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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