National Vulnerability Database (NVD) National Vulnerability Database (CVE-2009-4146)

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Last updated: Tue May 21 16:14:30 EDT 2013

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Vulnerability Summary for CVE-2009-4146

Original release date:12/02/2009

Last revised:12/07/2009

Source: US-CERT/NIST

Overview

The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1, 7.2, and 8.0 does not clear the LD_PRELOAD environment variable, which allows local users to gain privileges by executing a setuid or setguid program with a modified LD_PRELOAD variable containing an untrusted search path that points to a Trojan horse library, a different vector than CVE-2009-4147.

Impact

CVSS Severity (version 2.0):

CVSS v2 Base Score:7.2 (HIGH) (AV:L/AC:L/Au:N/C:C/I:C/A:C) (legend)

Impact Subscore: 10.0

Exploitability Subscore: 3.9

CVSS Version 2 Metrics:

Access Vector: Locally exploitable

Access Complexity: Low

Authentication: Not required to exploit

Impact Type:Provides administrator access, Allows complete confidentiality, integrity, and availability violation; Allows unauthorized disclosure of information; Allows disruption of service

References to Advisories, Solutions, and Tools

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External Source: SECTRACK

Name: 1023250

Hyperlink:http://www.securitytracker.com/id?1023250

External Source: BID

Name: 37154

Hyperlink:http://www.securityfocus.com/bid/37154

External Source: BUGTRAQ

Name: 20091201 Upcoming FreeBSD Security Advisory

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/508146/100/0/threaded

External Source: BUGTRAQ

Name: 20091130 ** FreeBSD local r00t zeroday

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/508142/100/0/threaded