# CVE-2012-1823

## Summary

- **CVE ID:** CVE-2012-1823
- **Severity:** CRITICAL
- **CVSS Score:** 9.8 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H)
- **CWE:** N/A
- **Published:** May 11, 2012
- **Last Modified:** Sep 16, 2026

## 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.

## Affected Products

- n/a — n/a (n/a)

## References

- [CNA](http://marc.info/?l=bugtraq&m=134012830914727&w=2)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html)
- [CNA](http://www.securitytracker.com/id?1027022)
- [CNA](http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041)
- [CNA](http://www.mandriva.com/security/advisories?name=MDVSA-2012:068)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-0546.html)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-0568.html)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-0569.html)
- [CNA](http://www.php.net/ChangeLog-5.php#5.4.2)
- [CNA](http://secunia.com/advisories/49014)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-0570.html)
- [CNA](http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html)
- [CNA](https://bugs.php.net/bug.php?id=61910)
- [CNA](http://www.kb.cert.org/vuls/id/673343)
- [CNA](http://rhn.redhat.com/errata/RHSA-2012-0547.html)
- [CNA](http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html)
- [CNA](http://support.apple.com/kb/HT5501)
- [CNA](http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/)
- [CNA](http://secunia.com/advisories/49065)
- [CNA](http://www.kb.cert.org/vuls/id/520827)
- [CNA](https://bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff&revision=1335984315&display=1)
- [CNA](http://www.debian.org/security/2012/dsa-2465)
- [CNA](http://secunia.com/advisories/49085)
- [CNA](http://www.php.net/archive/2012.php#id2012-05-03-1)
- [CNA](http://secunia.com/advisories/49087)
- [CNA](http://www.openwall.com/lists/oss-security/2024/06/07/1)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/)
- [CNA](https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/W45DBOH56NQDRTOM2DN2LNA2FZIMC3PK/)
- [CVE](https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PKGTQUOA2NTZ3RXN22CSAUJPIRUYRB4B/)
- [CISA-ADP](https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2012-1823)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 94.39%
- **EPSS Percentile:** 100.0

## Known Exploited Vulnerabilities (KEV)

- **Date Added:** Mar 25, 2022
- **Due Date:** Apr 15, 2022

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._