freeradius: OCSP does not verify status of certificates
Published Aug 4, 2011
5.8
MEDIUMCVSS 2.0
EPSS 1.85%
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.
Affected products
No data.
- 2.1.11
No data.
Red Hat Enterprise Linux 4
freeradius
Not affected
Red Hat Enterprise Linux 5
freeradius
Not affected
Red Hat Enterprise Linux 5
freeradius2
Not affected
Red Hat Enterprise Linux 6
freeradius
Not affected
| Product | Package | State | Advisory |
|---|---|---|---|
| Red Hat Enterprise Linux 4 | freeradius | Not affected | n/a |
| Red Hat Enterprise Linux 5 | freeradius | Not affected | n/a |
| Red Hat Enterprise Linux 5 | freeradius2 | Not affected | n/a |
| Red Hat Enterprise Linux 6 | freeradius | Not affected | n/a |
No package ranges for this CVE.
Remediation
Red Hat statement
Not vulnerable. This issue did not affect the versions of freeradius as shipped with Red Hat Enterprise Linux 4, 5, or 6.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
No CVSS v3.0 score for this CVE.
AV:N/AC:M/Au:N/C:P/I:P/A:N
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2022–2026- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (11 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 1.85% (0.01847) | 78.29th | v5 (v2026.06.15) |
| Jun 15, 2026 | 1.85% (0.01847) | 76.23th | v5 (v2026.06.15) |
| Mar 30, 2025 | 0.88% (0.00882) | 73.27th | v4 (v2025.03.14) |
| Mar 29, 2025 | 2.09% (0.02089) | 73.36th | v4 (v2025.03.14) |
| Mar 17, 2025 | 0.88% (0.00882) | 73.76th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.72% (0.00718) | 81.23th | v3 (v2023.03.01) |
| Feb 8, 2024 | 0.72% (0.00718) | 79.96th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.72% (0.00718) | 77.53th | v3 (v2023.03.01) |
| Mar 6, 2023 | 2.17% (0.02172) | 80.77th | v2 (v2022.01.01) |
| Apr 1, 2022 | 2.17% (0.02172) | 78.91th | v2 (v2022.01.01) |
| Feb 4, 2022 | 2.17% (0.02172) | 57.73th | v2 (v2022.01.01) |
References (14)
- http://secunia.com/advisories/45425 third-party-advisoryx_refsource_SECUNIAVendor Advisory
- http://securityreason.com/securityalert/8325 third-party-advisoryx_refsource_SREASON
- http://securitytracker.com/id?1025833 vdb-entryx_refsource_SECTRACK
- http://www.openwall.com/lists/oss-security/2011/07/15/6 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2011/07/18/2 mailing-listx_refsource_MLIST
- http://www.openwall.com/lists/oss-security/2011/07/20/9 mailing-listx_refsource_MLIST
- http://www.securityfocus.com/archive/1/518974/100/0/threaded mailing-listx_refsource_BUGTRAQ
- http://www.securityfocus.com/bid/48880 vdb-entryx_refsource_BID
- https://access.redhat.com/security/cve/CVE-2011-2701 Vendor Advisory
- https://bugzilla.redhat.com/show_bug.cgi?id=724815 x_refsource_MISCPatchIssue Tracking
- https://exchange.xforce.ibmcloud.com/vulnerabilities/68782 vdb-entryx_refsource_XF
- https://nvd.nist.gov/vuln/detail/CVE-2011-2701
- https://www.cve.org/CVERecord?id=CVE-2011-2701
- https://www.dfn-cert.de/informationen/Sicherheitsbulletins/dsb-2011-01.html x_refsource_MISC
Change history (0)
No recorded changes yet.