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Last updated: 5/28/2016 5:58:54 PM

CVE Publication rate: 20.23

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National Cyber Awareness System

Vulnerability Summary for CVE-2009-4147

Original release date: 12/02/2009
Last revised: 12/03/2009


The _rtld function in the Run-Time Link-Editor (rtld) in libexec/rtld-elf/rtld.c in FreeBSD 7.1 and 8.0 does not clear the (1) LD_LIBMAP, (2) LD_LIBRARY_PATH, (3) LD_LIBMAP_DISABLE, (4) LD_DEBUG, and (5) LD_ELF_HINTS_PATH environment variables, which allows local users to gain privileges by executing a setuid or setguid program with a modified variable containing an untrusted search path that points to a Trojan horse library, different vectors than CVE-2009-4146.


CVSS Severity (version 2.0):
CVSS v2 Base Score: 7.2 HIGH
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

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External Source: SECTRACK
Name: 1023250
Type: Patch Information
External Source: BUGTRAQ
Name: 20091201 Upcoming FreeBSD Security Advisory
Type: Patch Information
External Source: CONFIRM
Name: http://people.freebsd.org/~cperciva/rtld.patch
Type: Patch Information
External Source: BUGTRAQ
Name: 20091130 ** FreeBSD local r00t zeroday
External Source: BID
Name: 37154

Vulnerable software and versions

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Technical Details

Vulnerability Type (View All)
  • Permissions, Privileges, and Access Control (CWE-264)