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CVE-2009-4147

HighPublished

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)...

Published: Dec 2, 2009
Updated: Aug 7, 2024
Assigning CNA: mitre
Evidence observed: Nov 30, 2009

Primary CVSS

7.2/ 10High

nvd · CVSS 2.0

AV:L/AC:L/Au:N/C:C/I:C/A:C

EPSS probability estimate

3.7%

Low · next 30 days

Percentile: 89.5%
Model date: Oct 13, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

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.

Sources

Repository evidence: Files: 1 · Repositories: 1

1 Module

FreeBSD rtld execl() Privilege EscalationModule
modules/exploits/freebsd/local/rtld_execl_priv_esc.rb
Metasploit Framework modules
ExploitEvidence observed: Sep 26, 2026Revision: 6144ecdd0f63Related tool
Declared conditions
- platform: BSD($.exploit_freebsd/local/rtld_execl_priv_esc.platform)
- verification: check_declared($.exploit_freebsd/local/rtld_execl_priv_esc.check)

FreeBSD 8.0 Run-Time Link-Editor (RTLD) - Local Privilege EscalationExploit
kingcope · bsd · Nov 30, 2009

Responsible use

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