[gentoo-announce] [ GLSA 200808-08 ] stunnel: Security bypass

[news 28]

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Gentoo Linux Security Advisory GLSA 200808-08

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http://security.gentoo.org/

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Severity: Low

Title: stunnel: Security bypass

Date: August 08, 2008

Bugs: #222805

ID: 200808-08

 

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Synopsis

========

 

stunnel does not properly prevent the authentication of a revoked

certificate which would be published by OCSP.

 

Background

==========

 

The stunnel program is designed to work as an SSL encryption wrapper

between a remote client and a local or remote server. OCSP (Online

Certificate Status Protocol), as described in RFC 2560, is an internet

protocol used for obtaining the revocation status of an X.509 digital

certificate.

 

Affected packages

=================

 

-------------------------------------------------------------------

Package / Vulnerable / Unaffected

-------------------------------------------------------------------

1 net-misc/stunnel < 4.24 >= 4.24

 

Description

===========

 

An unspecified bug in the OCSP search functionality of stunnel has been

discovered.

 

Impact

======

 

A remote attacker can use a revoked certificate that would be

successfully authenticated by stunnel. This issue only concerns the

users who have enabled the OCSP validation in stunnel.

 

Workaround

==========

 

There is no known workaround at this time.

 

Resolution

==========

 

All stunnel users should upgrade to the latest version:

 

# emerge --sync

# emerge --ask --oneshot --verbose ">=net-misc/stunnel-1.2.3"

 

References

==========

 

[ 1 ] CVE-2008-2420

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2420

 

Availability

============

 

This GLSA and any updates to it are available for viewing at

the Gentoo Security Website:

 

http://security.gentoo.org/glsa/glsa-200808-08.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 2008 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