CVE-2011-2701 Information

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.

Reference

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