Vulnerability CVE-2011-2701
Published: 2011-08-03   Modified: 2012-02-13

Description:
The ocsp_check function in rlm_eap_tls.c in FreeRADIUS 2.1.11, when OCSP is enabled, does not properly parse replies from OCSP responders, which allows remote attackers to bypass authentication by using the EAP-TLS protocol with a revoked X.509 client certificate.

See advisories in our WLB2 database:
Topic
Author
Date
Med.
FreeRADIUS 2.1.11 Multiple Vulns
DCERT
06.08.2011

Type:

CWE-287

 (Improper Authentication)

CVSS2 => (AV:N/AC:M/Au:N/C:P/I:P/A:N)

CVSS Base Score
Impact Subscore
Exploitability Subscore
5.8/10
4.9/10
8.6/10
Exploit range
Attack complexity
Authentication
Remote
Medium
No required
Confidentiality impact
Integrity impact
Availability impact
Partial
Partial
None
Affected software
Freeradius -> Freeradius 

 References:
http://securityreason.com/securityalert/8325
http://securitytracker.com/id?1025833
http://www.openwall.com/lists/oss-security/2011/07/15/6
http://www.openwall.com/lists/oss-security/2011/07/18/2
http://www.openwall.com/lists/oss-security/2011/07/20/9
http://www.securityfocus.com/archive/1/518974/100/0/threaded
http://www.securityfocus.com/bid/48880
https://bugzilla.redhat.com/show_bug.cgi?id=724815
https://exchange.xforce.ibmcloud.com/vulnerabilities/68782
https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html
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