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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,…
Medium5.8EPSS 1.8%
- Published
- Updated
- Reserved
- Assigned by
- redhat
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.
Scores
| Scored by | CVSS | Score | Vector |
|---|---|---|---|
| NVDNVD · Modified | 2.0 | Medium5.8 | AV:N/AC:M/Au:N/C:P/I:P/A:N |
- EPSS (exploitation in 30 days)
- 1.8% · top 21% of all CVEs (2 Nov 2026)
Loading the EPSS history…
The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 5.8.
Weakness
Affected products
n/a
- affected n/a
References (11)
- 48880 (opens in a new tab)vdb-entryx_refsource_BIDx_transferred
- freeradius-certificate-security-bypass(68782) (opens in a new tab)vdb-entryx_refsource_XFx_transferred
- [oss-security] 20110715 CVE request: vulnerability in FreeRADIUS (OCSP) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- [oss-security] 20110718 Re: CVE request: vulnerability in FreeRADIUS (OCSP) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
- 45425 (opens in a new tab)third-party-advisoryx_refsource_SECUNIAx_transferred
- 20110725 [DSB-2011-01] Security Advisory FreeRADIUS 2.1.11 (opens in a new tab)mailing-listx_refsource_BUGTRAQx_transferred
- https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html (opens in a new tab)x_refsource_MISCx_transferred
- 8325 (opens in a new tab)third-party-advisoryx_refsource_SREASONx_transferred
- 1025833 (opens in a new tab)vdb-entryx_refsource_SECTRACKx_transferred
- https://bugzilla.redhat.com/show_bug.cgi?id=724815 (opens in a new tab)x_refsource_MISCx_transferred
- [oss-security] 20110720 Re: CVE request: vulnerability in FreeRADIUS (OCSP) (opens in a new tab)mailing-listx_refsource_MLISTx_transferred
Sources
The same CVE in the primary databases and aggregators, to check against.
- CVE.org record (opens in a new tab)
- CVE List JSON (GitHub) (opens in a new tab)
- NVD (opens in a new tab)
- FIRST EPSS (opens in a new tab)
- OSV.dev (opens in a new tab)
- GitHub Advisories (opens in a new tab)
- CIRCL Vulnerability-Lookup (opens in a new tab)
Record last updated .