Auth bypass in Freeradius
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.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v2 metric
CVSS v2 base score 5.8 (Medium). Vector: AV:N/AC:M/Au:N/C:P/I:P/A:N. This CVE predates CVSS v3 and has no v3 score from NVD.
EPSS exploit prediction
EPSS: 0.018 (78.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: 0.000
Affected products
- Freeradius — versions 2.1.11
Weakness classification (CWE)
References
- www.securityfocus.com/bid/48880 (vdb-entry)
- exchange.xforce.ibmcloud.com/vulnerabilities/68782 (vdb-entry)
- www.openwall.com/lists/oss-security/2011/07/15/6 (mailing-list)
- www.openwall.com/lists/oss-security/2011/07/18/2 (mailing-list)
- secunia.com/advisories/45425 (Vendor Advisory, third-party-advisory)
- www.securityfocus.com/archive/1/518974/100/0/threaded (mailing-list)
- www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html
- securityreason.com/securityalert/8325 (third-party-advisory)
- securitytracker.com/id (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (Patch)