CVE-2011-2701

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Summary

CVECVE-2011-2701
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2011-08-04 02:45:32 UTC
Updated2026-04-29 01:13:23 UTC
DescriptionThe 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.

Risk And Classification

Primary CVSS: v2.0 5.8 from [email protected]

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

Problem Types: CWE-287 | n/a

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Medium
Authentication
None
Confidentiality
Partial
Integrity
Partial
Availability
None

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

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Freeradius Freeradius 2.1.11 All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
FreeRADIUS 2.1.11 Multiple Vulns - CXSecurity.com af854a3a-2127-422b-91ae-364da2661108 securityreason.com
Security Alerts - Secunia af854a3a-2127-422b-91ae-364da2661108 secunia.com Vendor Advisory
FreeRADIUS Lets Remote Users Bypass OCSP Certificate Validation Using Expired Certificates - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 securitytracker.com
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
IBM X-Force Exchange af854a3a-2127-422b-91ae-364da2661108 exchange.xforce.ibmcloud.com
724815 – (CVE-2011-2701) CVE-2011-2701 freeradius: OCSP does not verify status of certificates af854a3a-2127-422b-91ae-364da2661108 bugzilla.redhat.com Patch
oss-security - CVE request: vulnerability in FreeRADIUS (OCSP) af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
oss-security - Re: CVE request: vulnerability in FreeRADIUS (OCSP) af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
Security Advisory FreeRADIUS 2.1.11 - DFN-CERT af854a3a-2127-422b-91ae-364da2661108 www.dfn-cert.de
oss-security - Re: CVE request: vulnerability in FreeRADIUS (OCSP) af854a3a-2127-422b-91ae-364da2661108 www.openwall.com
FreeRADIUS Revoked Certificate Authentication Bypass Vulnerability af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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