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full-disclosure-uk: [Full-disclosure] [ GLSA 200808-08 ] stunnel

[Full-disclosure] [ GLSA 200808-08 ] stunnel: Security bypass

From: Raphael Marichez <falco_at_nospam>
Date: Fri Aug 08 2008 - 17:26:38 GMT
To: gentoo-announce@gentoo.org

  • - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - Gentoo Linux Security Advisory GLSA 200808-08
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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@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



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