CVE-2012-1823

php, fedoraproject fedora, debian linux

Published 11 May 2012 · updated 16 Jun 2026 · Analyzed

9.8 Critical · CVSS 3.1, CISA ADP

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 25 Mar 2022, with a remediation deadline of 15 Apr 2022 for US federal agencies.

Required action: Apply updates per vendor instructions.

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.

References