GLSA Advocate
Joined: 12 May 2004 Posts: 2663
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Posted: Fri Aug 08, 2008 6:26 pm Post subject: [ GLSA 200808-08 ] stunnel: Security bypass |
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Gentoo Linux Security Advisory
Title: stunnel: Security bypass (GLSA 200808-08)
Severity: low
Exploitable: remote
Date: August 08, 2008
Updated: August 09, 2009
Bug(s): #222805
ID: 200808-08
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: net-misc/stunnel
Vulnerable: < 4.24
Unaffected: >= 4.24
Unaffected: < 4
Architectures: All supported architectures
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:
Code: | # emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/stunnel-4.24" |
References
CVE-2008-2420
Last edited by GLSA on Sat Aug 22, 2009 4:17 am; edited 1 time in total |
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