Joined: 12 May 2004
|Posted: Fri Aug 08, 2008 6:26 pm Post subject: [ GLSA 200808-08 ] stunnel: Security bypass
|Gentoo Linux Security Advisory
Title: stunnel: Security bypass (GLSA 200808-08)
Date: August 08, 2008
Updated: August 09, 2009
stunnel does not properly prevent the authentication of a revoked
certificate which would be published by OCSP.
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
Vulnerable: < 4.24
Unaffected: >= 4.24
Unaffected: < 4
Architectures: All supported architectures
An unspecified bug in the OCSP search functionality of stunnel has been
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.
There is no known workaround at this time.
All stunnel users should upgrade to the latest version:
|# emerge --sync
# emerge --ask --oneshot --verbose ">=net-misc/stunnel-4.24"
Last edited by GLSA on Sat Aug 22, 2009 4:17 am; edited 1 time in total