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

[news 28]

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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 ( -at -) 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