CVE-2011-2701

MEDIUM 5.8CVE-2011-2701 · Published 04/08/2011 · updated 16/06/2026

In short

CVE-2011-2701 is a MEDIUM (CVSS 5.8) vulnerability affecting freeradius (freeradius).
Chance of exploitation in the next 30 days (EPSS): 1.8%, higher than 79.1% of all vulnerabilities.
No patched version is listed yet: follow the vendor's advisory in References.

Package	Affected versions	Patched versions
freeradius freeradius	`= 2.1.11`	No fix yet

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.

References

secunia.com/advisories/45425 · Vendor Advisory
securityreason.com/securityalert/8325
securitytracker.com/id
openwall.com/lists/oss-security/2011/07/15/6
openwall.com/lists/oss-security/2011/07/18/2
openwall.com/lists/oss-security/2011/07/20/9
securityfocus.com/archive/1/518974/100/0/threaded
securityfocus.com/bid/48880
bugzilla.redhat.com/show_bug.cgi · Patch
exchange.xforce.ibmcloud.com/vulnerabilities/68782
dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html

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