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Vulnerability record · CVE-2012-3547 · published 18 September 2012

CVE-2012-3547: Freeradius memory buffer overflow vulnerability

Freeradius · Freeradius

Stack-based buffer overflow in the cbtls_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remote attackers to cause a denial of service (server crash) and possibly execute arbitrary code via a long "not after" timestamp in a client certificate.

6.8 CVSS 2.0 Medium EPSS 5.7% · top 7.3% CWE-119 · Memory buffer overflow
6.8CVSS 2.0 base score
5.7%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
40References
16 Jun 2026Last modified by NVD

Description

Stack-based buffer overflow in the cbtls_verify function in FreeRADIUS 2.1.10 through 2.1.12, when using TLS-based EAP methods, allows remote attackers to cause a denial of service (server crash) and possibly execute arbitrary code via a long "not after" timestamp in a client certificate.

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

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://archives.neohapsis.com/archives/bugtraq/2012-09/0043.html
http://freeradius.org/security.html Vendor Advisory
http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090171.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00023.html
http://osvdb.org/85325
http://rhn.redhat.com/errata/RHSA-2012-1326.html
http://rhn.redhat.com/errata/RHSA-2012-1327.html
http://secunia.com/advisories/50484 Vendor Advisory
http://secunia.com/advisories/50584 Vendor Advisory
http://secunia.com/advisories/50637
http://secunia.com/advisories/50770
http://www.debian.org/security/2012/dsa-2546
http://www.mandriva.com/security/advisories?name=MDVSA-2012:159
http://www.openwall.com/lists/oss-security/2012/09/10/2
http://www.pre-cert.de/advisories/PRE-SA-2012-06.txt
http://www.securityfocus.com/bid/55483
http://www.securitytracker.com/id?1027509
http://www.ubuntu.com/usn/USN-1585-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/78408
http://archives.neohapsis.com/archives/bugtraq/2012-09/0043.html
http://freeradius.org/security.html Vendor Advisory
http://lists.apple.com/archives/security-announce/2013/Oct/msg00006.html
http://lists.fedoraproject.org/pipermail/package-announce/2012-October/090171.html
http://lists.opensuse.org/opensuse-security-announce/2012-09/msg00023.html
http://osvdb.org/85325
http://rhn.redhat.com/errata/RHSA-2012-1326.html
http://rhn.redhat.com/errata/RHSA-2012-1327.html
http://secunia.com/advisories/50484 Vendor Advisory
http://secunia.com/advisories/50584 Vendor Advisory
http://secunia.com/advisories/50637
http://secunia.com/advisories/50770
http://www.debian.org/security/2012/dsa-2546
http://www.mandriva.com/security/advisories?name=MDVSA-2012:159
http://www.openwall.com/lists/oss-security/2012/09/10/2
http://www.pre-cert.de/advisories/PRE-SA-2012-06.txt
http://www.securityfocus.com/bid/55483
http://www.securitytracker.com/id?1027509
http://www.ubuntu.com/usn/USN-1585-1
https://exchange.xforce.ibmcloud.com/vulnerabilities/78408

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2019-11234Freeradius improper authentication vulnerabilityFreeRADIUS before 3.0.19 does not prevent use of reflection for authentication spoofing, aka a "Dragonblood" issue, a similar issue to CVE-2019-9497.EPSS 7.6%9.8CVE-2019-11235Freeradius insufficient verification of data authenticity vulnerabilityFreeRADIUS before 3.0.19 mishandles the "each participant verifies that the received scalar is within a range, and that the received group element is…EPSS 3.6%9.8CVE-2017-10979Freeradius out-of-bounds write vulnerabilityAn FR-GV-202 issue in FreeRADIUS 2.x before 2.2.10 allows "Write overflow in rad_coalesce()" - this allows remote attackers to cause a denial of serv…EPSS 7.0%9.8CVE-2017-10984Freeradius out-of-bounds write vulnerabilityAn FR-GV-301 issue in FreeRADIUS 3.x before 3.0.15 allows "Write overflow in data2vp_wimax()" - this allows remote attackers to cause a denial of ser…EPSS 6.4%9.8CVE-2017-9148Freeradius improper authentication vulnerabilityThe TLS session cache in FreeRADIUS 2.1.1 through 2.1.7, 3.0.x before 3.0.14, 3.1.x before 2017-02-04, and 4.0.x before 2017-02-04 fails to reliably …EPSS 3.9%9.0CVE-2024-3596Freeradius vulnerabilityRADIUS Protocol under RFC 2865 is susceptible to forgery attacks by a local attacker who can modify any valid Response (Access-Accept, Access-Reject,…EPSS 15%8.1CVE-2015-8763Freeradius out-of-bounds read vulnerabilityThe EAP-PWD module in FreeRADIUS 3.0 through 3.0.8 allows remote attackers to have unspecified impact via a crafted (1) commit or (2) confirm message…EPSS 1.2%8.1CVE-2015-8764Freeradius memory buffer overflow vulnerabilityOff-by-one error in the EAP-PWD module in FreeRADIUS 3.0 through 3.0.8, which triggers a buffer overflow.EPSS 1.1%

Source: NIST National Vulnerability Database (record CVE-2012-3547), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.