CVE-2011-2701

Severity: medium (CVSS 5.8 v2.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2011-08-04 · updated 2026-06-16
Weakness: CWE-287

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.

Affected products

freeradius: 2.1.11

References

http://secunia.com/advisories/45425
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
http://secunia.com/advisories/45425

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