SB2024021555 - Time-of-check Time-of-use (TOCTOU) Race Condition in PHP

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Main Vulnerability Database SB2024021555

SB2024021555 - Time-of-check Time-of-use (TOCTOU) Race Condition in PHP

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

Security Bulletin ID SB2024021555
Severity
Medium
Patch available
YES
Number of vulnerabilities 1
Exploitation vector Remote access
Highest impact Data manipulation

Breakdown by Severity

Medium 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 1 security vulnerability.


1) Time-of-check Time-of-use (TOCTOU) Race Condition (CVE-ID: CVE-2004-0594)

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.

References