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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 |
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Title: stunnel: Security bypass |
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Date: August 08, 2008 |
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Bugs: #222805 |
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ID: 200808-08 |
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Synopsis |
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======== |
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|
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stunnel does not properly prevent the authentication of a revoked |
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certificate which would be published by OCSP. |
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|
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Background |
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========== |
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|
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The stunnel program is designed to work as an SSL encryption wrapper |
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between a remote client and a local or remote server. OCSP (Online |
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Certificate Status Protocol), as described in RFC 2560, is an internet |
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protocol used for obtaining the revocation status of an X.509 digital |
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certificate. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 net-misc/stunnel < 4.24 >= 4.24 |
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Description |
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=========== |
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|
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An unspecified bug in the OCSP search functionality of stunnel has been |
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discovered. |
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|
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Impact |
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====== |
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|
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A remote attacker can use a revoked certificate that would be |
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successfully authenticated by stunnel. This issue only concerns the |
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users who have enabled the OCSP validation in stunnel. |
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|
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Workaround |
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========== |
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There is no known workaround at this time. |
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Resolution |
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========== |
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All stunnel users should upgrade to the latest version: |
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# emerge --sync |
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# emerge --ask --oneshot --verbose ">=net-misc/stunnel-1.2.3" |
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|
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References |
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========== |
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|
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[ 1 ] CVE-2008-2420 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2420 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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http://security.gentoo.org/glsa/glsa-200808-08.xml |
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Concerns? |
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========= |
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2008 Gentoo Foundation, Inc; referenced text |
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belongs to its owner(s). |
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|
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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|
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http://creativecommons.org/licenses/by-sa/2.5 |
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