FreeRADIUS 2.1.10/2.1.11/2.1.12 Function Certificate cbtls_verify memory corruption

CVSS Meta Temp Score
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CTI Interest Score
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9.0$0-$5k0.00

A vulnerability was found in FreeRADIUS 2.1.10/2.1.11/2.1.12 (Network Authentication Software). It has been rated as critical. Affected by this issue is the function cbtls_verify of the component Function Certificate Handler. The manipulation with an unknown input leads to a memory corruption vulnerability. Using CWE to declare the problem leads to CWE-119. The product performs operations on a memory buffer, but it can read from or write to a memory location that is outside of the intended boundary of the buffer. Impacted is confidentiality, integrity, and availability. CVE summarizes:

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.

The weakness was published 09/10/2012 by Timo Warns with PRESENSE Technologies GmbH as PRE-SA-2012-06 as confirmed advisory (Website). The advisory is available at pre-cert.de. The public release has been coordinated with the vendor. This vulnerability is handled as CVE-2012-3547 since 06/14/2012. The exploitation is known to be difficult. The attack may be launched remotely. No form of authentication is required for exploitation. Technical details as well as a private exploit are known.

It is declared as proof-of-concept. The vulnerability scanner Nessus provides a plugin with the ID 74758 (openSUSE Security Update : freeradius (openSUSE-SU-2012:1200-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family SuSE Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 350616 (Amazon Linux Security Advisory for freeradius: ALAS-2012-131).

Upgrading to version 2.2.0 eliminates this vulnerability. The upgrade is hosted for download at freeradius.org. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (78408), Tenable (74758), SecurityFocus (BID 55483†), OSVDB (85325†) and Secunia (SA50484†). Similar entries are available at VDB-10954, VDB-63739 and VDB-76031.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
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CVSSv3info

VulDB Meta Base Score: 10.0
VulDB Meta Temp Score: 9.0

VulDB Base Score: 10.0
VulDB Temp Score: 9.0
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
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Exploitinginfo

Class: Memory corruption
CWE: CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 74758
Nessus Name: openSUSE Security Update : freeradius (openSUSE-SU-2012:1200-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

OpenVAS ID: 72175
OpenVAS Name: Debian Security Advisory DSA 2546-1 (freeradius)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
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Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: FreeRADIUS 2.2.0

Timelineinfo

06/14/2012 🔍
09/10/2012 +88 days 🔍
09/10/2012 +0 days 🔍
09/10/2012 +0 days 🔍
09/10/2012 +0 days 🔍
09/10/2012 +0 days 🔍
09/11/2012 +1 days 🔍
09/12/2012 +1 days 🔍
09/13/2012 +1 days 🔍
09/18/2012 +5 days 🔍
06/13/2014 +633 days 🔍
12/30/2024 +3853 days 🔍

Sourcesinfo

Advisory: PRE-SA-2012-06
Researcher: Timo Warns
Organization: PRESENSE Technologies GmbH
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2012-3547 (🔍)
OVAL: 🔍

X-Force: 78408
SecurityFocus: 55483 - FreeRADIUS Multiple Stack Based Buffer Overflow Vulnerabilities
Secunia: 50484 - FreeRADIUS Client Certificate Verification Buffer Overflow Vulnerability, Highly Critical
OSVDB: 85325
SecurityTracker: 1027509

scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 09/13/2012 12:58 PM
Updated: 12/30/2024 11:51 PM
Changes: 09/13/2012 12:58 PM (88), 04/28/2019 09:41 AM (1), 12/30/2024 11:51 PM (17)
Complete: 🔍
Committer: olku
Cache ID: 18:1F1:40

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