FreeRADIUS 2.1.11 rlm_eap_tls.c ocsp_check improper authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.5$0-$5k0.00

Summaryinfo

A vulnerability was found in FreeRADIUS 2.1.11. It has been rated as problematic. Affected by this issue is the function ocsp_check of the file rlm_eap_tls.c. Performing a manipulation results in improper authentication. This vulnerability is identified as CVE-2011-2701. There is not any exploit available.

Detailsinfo

A vulnerability was found in FreeRADIUS 2.1.11 (Network Authentication Software). It has been classified as critical. This affects the function ocsp_check of the file rlm_eap_tls.c. The manipulation with an unknown input leads to a improper authentication vulnerability. CWE is classifying the issue as CWE-287. When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct. This is going to have an impact on confidentiality, and integrity. The summary by CVE is:

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.

The weakness was released 08/03/2011 with CERT as Bug 724815 as confirmed bug report (Bugzilla). It is possible to read the advisory at bugzilla.redhat.com. This vulnerability is uniquely identified as CVE-2011-2701 since 07/11/2011. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 61948 (Mandriva Linux Security Advisory : freeradius (MDVSA-2012:047)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Mandriva Local Security Checks. The commercial vulnerability scanner Qualys is able to test this issue with plugin 119463 (FreeRADIUS OCSP Authentication Bypass Vulnerability).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

The vulnerability is also documented in the databases at X-Force (68782), Tenable (61948), SecurityFocus (BID 48880†), Secunia (SA45425†) and SecurityTracker (ID 1025833†). Entries connected to this vulnerability are available at VDB-54952 and VDB-54951. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 6.5
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Improper authentication
CWE: CWE-287
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 61948
Nessus Name: Mandriva Linux Security Advisory : freeradius (MDVSA-2012:047)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Port: 🔍

OpenVAS ID: 831647
OpenVAS Name: Mandriva Update for freeradius MDVSA-2012:047 (freeradius)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

07/11/2011 🔍
07/25/2011 +14 days 🔍
07/25/2011 +0 days 🔍
07/25/2011 +0 days 🔍
07/26/2011 +1 days 🔍
08/02/2011 +7 days 🔍
08/03/2011 +1 days 🔍
08/03/2011 +0 days 🔍
09/06/2012 +400 days 🔍
03/23/2015 +928 days 🔍
01/12/2025 +3583 days 🔍

Sourcesinfo

Advisory: Bug 724815
Organization: CERT
Status: Confirmed

CVE: CVE-2011-2701 (🔍)
GCVE (CVE): GCVE-0-2011-2701
GCVE (VulDB): GCVE-100-58191
X-Force: 68782
SecurityFocus: 48880 - FreeRADIUS Revoked Certificate Authentication Bypass Vulnerability
Secunia: 45425 - FreeRADIUS OCSP Authentication Bypass Vulnerability, Moderately Critical
SecurityTracker: 1025833 - FreeRADIUS Lets Remote Users Bypass OCSP Certificate Validation Using Expired Certificates
Vulnerability Center: 32522 - FreeRADIUS 2.0-2.0.5 and 2.1-2.1.10 Remote Security Bypass Vulnerability, Medium

See also: 🔍

Entryinfo

Created: 03/23/2015 16:50
Updated: 01/12/2025 01:13
Changes: 03/23/2015 16:50 (65), 03/29/2017 09:18 (16), 11/17/2021 09:29 (3), 01/12/2025 01:13 (16)
Complete: 🔍
Cache ID: 216:CFF:103

Be aware that VulDB is the high quality source for vulnerability data.

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