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Last updated: 5/26/2016 2:28:04 AM

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Vulnerability Summary for CVE-2012-3547

Original release date: 09/18/2012
Last revised: 10/30/2013


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.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 6.8 MEDIUM
Impact Subscore: 6.4
Exploitability Subscore: 8.6
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Medium
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information; Allows unauthorized modification; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: MANDRIVA
Name: MDVSA-2012:159
External Source: REDHAT
Name: RHSA-2012:1326
External Source: XF
Name: freeradius-cbtlsverify-bo(78408)
External Source: SECTRACK
Name: 1027509
External Source: CONFIRM
Name: http://freeradius.org/security.html
Type: Advisory
External Source: APPLE
Name: APPLE-SA-2013-10-22-5
External Source: BUGTRAQ
Name: 20120910 [PRE-SA-2012-06] FreeRADIUS: Stack Overflow in TLS-based EAP Methods
External Source: DEBIAN
Name: DSA-2546
External Source: FEDORA
Name: FEDORA-2012-15743
External Source: MISC
Name: http://www.pre-cert.de/advisories/PRE-SA-2012-06.txt
External Source: BID
Name: 55483
External Source: UBUNTU
Name: USN-1585-1
External Source: SUSE
Name: openSUSE-SU-2012:1200
External Source: REDHAT
Name: RHSA-2012:1327
External Source: MLIST
Name: [oss-security] 20120910 [PRE-SA-2012-06] FreeRADIUS: Stack Overflow in TLS-based EAP Methods

Technical Details

Vulnerability Type (View All)