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Fencer Intel
medium 6.8

CVE-2012-3547 json

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 remo…

published 2012-09-18 14 y ago modified 2026-06-16 4 mo ago also EUVD-2012-3494

cvss
6.8
version 2.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
5.7%
EPSS 5.7% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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.

Patch / fix

  • freeradius Debian 14, Debian 13, Debian 12 2.1.12+dfsg-1.1

debian advisories DEBIAN-CVE-2012-3547

  • freeradius2 RHEL 5 2.1.12-4.el5_8
  • freeradius2-krb5 RHEL 5 2.1.12-4.el5_8
  • freeradius2-ldap RHEL 5 2.1.12-4.el5_8
  • freeradius2-perl RHEL 5 2.1.12-4.el5_8
  • freeradius2-mysql RHEL 5 2.1.12-4.el5_8
  • freeradius2-utils RHEL 5 2.1.12-4.el5_8
  • freeradius2-python RHEL 5 2.1.12-4.el5_8
  • freeradius2-unixODBC RHEL 5 2.1.12-4.el5_8

red hat advisories RHSA-2012:1327RHSA-2012:1326

  • freeradius-server openSUSE Tumbleweed 3.0.12-1.1

opensuse advisories openSUSE-SU-2024:10053-1

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2012-3547 updated cvss 5.0

freeradius: stack-based buffer overflow via long expiration date fields in client X509 certificates

  • Red Hat Enterprise Linux (v. 5 server) freeradius2 2.1.12-4.el5_8, freeradius2-krb5 2.1.12-4.el5_8, freeradius2-ldap 2.1.12-4.el5_8, freeradius2-perl 2.1.12-4.el5_8, freeradius2-mysql 2.1.12-4.el5_8, freeradius2-utils 2.1.12-4.el5_8, +3 more
    fixed: vendor fix RHSA-2012:1327
  • Red Hat Enterprise Linux Server (v. 6) freeradius 2.1.12-4.el6_3 Red Hat Enterprise Linux Server Optional (v. 6) freeradius 2.1.12-4.el6_3, freeradius-krb5 2.1.12-4.el6_3, freeradius-ldap 2.1.12-4.el6_3, freeradius-perl 2.1.12-4.el6_3, freeradius-mysql 2.1.12-4.el6_3, freeradius-utils 2.1.12-4.el6_3, +3 more Red Hat Enterprise Linux Workstation (v. 6) freeradius 2.1.12-4.el6_3 Red Hat Enterprise Linux Workstation Optional (v. 6) freeradius 2.1.12-4.el6_3, freeradius-krb5 2.1.12-4.el6_3, freeradius-ldap 2.1.12-4.el6_3, freeradius-perl 2.1.12-4.el6_3, freeradius-mysql 2.1.12-4.el6_3, freeradius-utils 2.1.12-4.el6_3, +3 more
    fixed: vendor fix RHSA-2012:1326
  • Red Hat RHEL Desktop Workstation (v. 5 client) freeradius2 2.1.12-4.el5_8, freeradius2-krb5 2.1.12-4.el5_8, freeradius2-ldap 2.1.12-4.el5_8, freeradius2-perl 2.1.12-4.el5_8, freeradius2-mysql 2.1.12-4.el5_8, freeradius2-utils 2.1.12-4.el5_8, +3 more
    fixed: vendor fix RHSA-2012:1327
  • Red Hat Enterprise Linux 5 freeradius
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

5.70% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-09).

CVSS scores

assigned by version score vector
NVD 2.0 6.8 AV:N/AC:M/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-119 Improper Restriction of Operations within the Bounds of a Memory Buffer

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.