#VU110522 Time-of-check Time-of-use (TOCTOU) Race Condition in PHP - CVE-2004-0594

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Main Vulnerability Database Vulnerabilities #VU110522

#VU110522 Time-of-check Time-of-use (TOCTOU) Race Condition in PHP - CVE-2004-0594

Published: February 15, 2024 / Updated: June 10, 2025


Vulnerability identifier: #VU110522
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P/U:Green
CVE-ID: CVE-2004-0594
CWE-ID: CWE-367
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 memory_limit functionality in PHP 4.x up to 4.3.7, and 5.x up to 5.0.0RC3, under certain conditions such as when register_globals is enabled, allows remote attackers to execute arbitrary code by triggering a memory_limit abort during execution of the zend_hash_init function and overwriting a HashTable destructor pointer before the initialization of key data structures is complete.


Remediation

Install update from vendor's website.

External links