Vulnerability Monitor

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CVE-2011-2701

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.

Published

2011-08-04T02:45:32.297

Last Modified

2025-04-11T00:51:21.963

Status

Deferred

Source

[email protected]

Severity

CVSSv2: 5.8 (MEDIUM)

CVSSv2 Vector

AV:N/AC:M/Au:N/C:P/I:P/A:N

Access Vector: NETWORK
Access Complexity: MEDIUM
Authentication: NONE
Confidentiality Impact: PARTIAL
Integrity Impact: PARTIAL
Availability Impact: NONE

Exploitability Score

8.6

Impact Score

4.9

Weaknesses

Type: Primary
CWE-287

Affected Vendors & Products

Type	Vendor	Product	Version/Range	Vulnerable?
Application	freeradius	freeradius	2.1.11	Yes

References

http://secunia.com/advisories/45425 Vendor Advisory ([email protected])
http://securityreason.com/securityalert/8325 ([email protected])
http://securitytracker.com/id?1025833 ([email protected])
http://www.openwall.com/lists/oss-security/2011/07/15/6 ([email protected])
http://www.openwall.com/lists/oss-security/2011/07/18/2 ([email protected])
http://www.openwall.com/lists/oss-security/2011/07/20/9 ([email protected])
http://www.securityfocus.com/archive/1/518974/100/0/threaded ([email protected])
http://www.securityfocus.com/bid/48880 ([email protected])
https://bugzilla.redhat.com/show_bug.cgi?id=724815 Patch ([email protected])
https://exchange.xforce.ibmcloud.com/vulnerabilities/68782 ([email protected])
https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html ([email protected])
http://secunia.com/advisories/45425 Vendor Advisory (af854a3a-2127-422b-91ae-364da2661108)
http://securityreason.com/securityalert/8325 (af854a3a-2127-422b-91ae-364da2661108)
http://securitytracker.com/id?1025833 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2011/07/15/6 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2011/07/18/2 (af854a3a-2127-422b-91ae-364da2661108)
http://www.openwall.com/lists/oss-security/2011/07/20/9 (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/archive/1/518974/100/0/threaded (af854a3a-2127-422b-91ae-364da2661108)
http://www.securityfocus.com/bid/48880 (af854a3a-2127-422b-91ae-364da2661108)
https://bugzilla.redhat.com/show_bug.cgi?id=724815 Patch (af854a3a-2127-422b-91ae-364da2661108)
https://exchange.xforce.ibmcloud.com/vulnerabilities/68782 (af854a3a-2127-422b-91ae-364da2661108)
https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html (af854a3a-2127-422b-91ae-364da2661108)