CVE-2012-1823

CRITICAL9.8

CISA KEV

Published 2012-05-11 · Updated 2026-06-16 · Source cret@cert.org

Summary

CVE-2012-1823 is a critical-severity (CVSS 9.8) vulnerability in PHP PHP. CISA added it to the Known Exploited Vulnerabilities catalog on March 25, 2022, which means exploitation in the wild has been confirmed; US federal agencies had to remediate it by April 15, 2022. CISA does not currently list it as used in ransomware campaigns. PHP has 3 vulnerabilities in the KEV catalog, 1 of them linked to ransomware.

All 3 known-exploited PHP vulnerabilities →

Description

sapi/cgi/cgi_main.c in PHP before 5.3.12 and 5.4.x before 5.4.2, when configured as a CGI script (aka php-cgi), does not properly handle query strings that lack an = (equals sign) character, which allows remote attackers to execute arbitrary code by placing command-line options in the query string, related to lack of skipping a certain php_getopt for the 'd' case.

CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

CWE-77CWE-77

CISA Known-Exploited Vulnerability

Product: PHP — PHP

Name: PHP-CGI Query String Parameter Vulnerability

Date added: 2022-03-25 · Due: 2022-04-15

Required action: Apply updates per vendor instructions.

References

View on NVD

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