#VU110317 Permissions, Privileges, and Access Controls in PHP - CVE-2009-4018

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Main Vulnerability Database Vulnerabilities #VU110317

#VU110317 Permissions, Privileges, and Access Controls in PHP - CVE-2009-4018

Published: October 30, 2018 / Updated: June 8, 2025


Vulnerability identifier: #VU110317
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2009-4018
CWE-ID: CWE-264
Exploitation vector: Remote access
Exploit availability: Public exploit is available
Vulnerable software:
PHP
Software vendor:
PHP Group

Description

The vulnerability allows a remote non-authenticated attacker to read and manipulate data.

The proc_open function in ext/standard/proc_open.c in PHP before 5.2.11 and 5.3.x before 5.3.1 does not enforce the (1) safe_mode_allowed_env_vars and (2) safe_mode_protected_env_vars directives, which allows context-dependent attackers to execute programs with an arbitrary environment via the env parameter, as demonstrated by a crafted value of the LD_LIBRARY_PATH environment variable.


Remediation

Install update from vendor's website.

External links