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CVE-2011-2701

21
FAUCET Score

CVE-2011-2701 describes a vulnerability in FreeRADIUS 2.1.11, specifically within the ocsp_check function when OCSP is enabled. This flaw allows remote attackers to bypass authentication by presenting a revoked X.509 client certificate via the EAP-TLS protocol due to improper parsing of OCSP responder replies. The vulnerability has a CVSS score of 5.8, indicating a medium severity with a network attack vector, medium attack complexity, and potential for partial confidentiality and integrity impact. There is no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
2.1.11CPE matchmatch criteria
cpe:2.3:a:freeradius:freeradius:2.1.11:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 2.0

5.8MEDIUM

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

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
MEDIUM
Authentication
NONE
Exploitability Score
8.6
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.85%
Probability of exploitation in next 30 days
EPSS Percentile
76.8%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.0185 is in the 58th percentile among its peer group of 19,953 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.0 Bluesky, 0.0 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

redhatpatch availablevia nvd_reference
View patch

Vendor Advisories (1)

redhatCVE-2011-2701Moderate

freeradius: OCSP does not verify status of certificates

Jul 15, 2011

References

bugzilla.redhat.com / show_bug.cgi
Patch
secunia.com / advisories/45425
Vendor Advisory
securityreason.com / securityalert/8325
securitytracker.com / id
exchange.xforce.ibmcloud.com / vulnerabilities/68782
dfn-cert.de / informationen/Sicherheitsbulletins/dsb-2011-01.html
openwall.com / lists/oss-security/2011/07/15/6
openwall.com / lists/oss-security/2011/07/18/2
openwall.com / lists/oss-security/2011/07/20/9
securityfocus.com / archive/1/518974/100/0/threaded
securityfocus.com / bid/48880