| <?xml version="1.0" encoding="utf-8"?> |
| <!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd"> |
| |
| <glsa id="200808-08"> |
| <title>stunnel: Security bypass</title> |
| <synopsis> |
| stunnel does not properly prevent the authentication of a revoked |
| certificate which would be published by OCSP. |
| </synopsis> |
| <product type="ebuild">stunnel</product> |
| <announced>August 08, 2008</announced> |
| <revised>August 09, 2009: 02</revised> |
| <bug>222805</bug> |
| <access>remote</access> |
| <affected> |
| <package name="net-misc/stunnel" auto="yes" arch="*"> |
| <unaffected range="ge">4.24</unaffected> |
| <unaffected range="lt">4</unaffected> |
| <vulnerable range="lt">4.24</vulnerable> |
| </package> |
| </affected> |
| <background> |
| <p> |
| 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. |
| </p> |
| </background> |
| <description> |
| <p> |
| An unspecified bug in the OCSP search functionality of stunnel has been |
| discovered. |
| </p> |
| </description> |
| <impact type="low"> |
| <p> |
| 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. |
| </p> |
| </impact> |
| <workaround> |
| <p> |
| There is no known workaround at this time. |
| </p> |
| </workaround> |
| <resolution> |
| <p> |
| All stunnel users should upgrade to the latest version: |
| </p> |
| <code> |
| # emerge --sync |
| # emerge --ask --oneshot --verbose ">=net-misc/stunnel-4.24"</code> |
| </resolution> |
| <references> |
| <uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2008-2420">CVE-2008-2420</uri> |
| </references> |
| <metadata tag="requester" timestamp="Sun, 03 Aug 2008 21:53:49 +0000"> |
| rbu |
| </metadata> |
| <metadata tag="submitter" timestamp="Tue, 05 Aug 2008 21:07:35 +0000"> |
| falco |
| </metadata> |
| <metadata tag="bugReady" timestamp="Tue, 05 Aug 2008 21:08:30 +0000"> |
| falco |
| </metadata> |
| </glsa> |