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[ GLSA 200808-08 ] stunnel: Security bypass
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GLSA
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PostPosted: Fri Aug 08, 2008 6:26 pm    Post subject: [ GLSA 200808-08 ] stunnel: Security bypass Reply with quote

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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