FKIE_CVE-2011-2701
Vulnerability from fkie_nvd - Published: 2011-08-04 02:45 - Updated: 2026-06-16 23:31
Severity
Summary
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
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| freeradius | freeradius | 2.1.11 |
{
"affected": [
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"affectedData": [
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"source": "secalert@redhat.com"
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"configurations": [
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"descriptions": [
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"value": "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."
},
{
"lang": "es",
"value": "La funci\u00f3n ocsp_check de rlm_eap_tls.c de FreeRADIUS 2.1.11, si OCSP est\u00e1 habilitado, no analiza correctamente la sintaxis (\"parse\") de las respuestas de los agentes transmisores OCSP, lo que permite a atacantes remotos evitar la autenticaci\u00f3n usando el protocolo EAP-TLS con un certificado cliente X.509 revocado."
}
],
"id": "CVE-2011-2701",
"lastModified": "2026-06-16T23:31:49.713",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 5.8,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 8.6,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
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}
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},
"published": "2011-08-04T02:45:32.297",
"references": [
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"tags": [
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"url": "http://securitytracker.com/id?1025833"
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"source": "secalert@redhat.com",
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"url": "http://www.openwall.com/lists/oss-security/2011/07/20/9"
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{
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"url": "http://www.securityfocus.com/archive/1/518974/100/0/threaded"
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{
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"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/68782"
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"url": "https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html"
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"url": "http://securitytracker.com/id?1025833"
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"url": "http://www.openwall.com/lists/oss-security/2011/07/15/6"
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"url": "http://www.openwall.com/lists/oss-security/2011/07/18/2"
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"url": "http://www.securityfocus.com/archive/1/518974/100/0/threaded"
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"url": "http://www.securityfocus.com/bid/48880"
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{
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"url": "https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html"
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],
"sourceIdentifier": "secalert@redhat.com",
"vulnStatus": "Modified",
"weaknesses": [
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"value": "CWE-287"
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"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Nomenclature
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
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The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.
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