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CVE-2009-4147

Status Candidate

Overview

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.

Related Files

FreeBSD rtld execl() Privilege Escalation: Posted May 22, 2019; Authored by stealth, Kingcope | Site metasploit.com; This Metasploit module exploits a vulnerability in the FreeBSD run-time link-editor (rtld). The rtld unsetenv() function fails to remove LD_* environment variables if __findenv() fails. This can be abused to load arbitrary shared objects using LD_PRELOAD, resulting in privileged code execution.; tags | exploit, arbitrary, code execution; systems | freebsd, bsd; advisories | CVE-2009-4146, CVE-2009-4147; SHA-256 | b7d2e9a938e3bd3e306735ac30c5547fb5873fe1a798d291f7cd437bdee37ad0; Download | Favorite | View

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CVE-2009-4147

Overview

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September 2024

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