CVE-2012-2311
sapi/cgi/cgi_main.c in PHP before 5.3.13 and 5.4.x before 5.4.3, when configured as a CGI script (aka php-cgi), does not properly handle query strings that contain a %3D sequence but no = (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. NOTE: this vulnerability exists because of an incomplete fix for CVE-2012-1823.
Key facts
- CVSS score
- 7.5 (v2.0)
- Severity
- HIGH
- CVSS vector
AV:N/AC:L/Au:N/C:P/I:P/A:P- Weakness (CWE)
- CWE-89
- EPSS score
- 69.3% (99th percentile)
- In CISA KEV
- No
- In EU EUVD
- Yes (EUVD-2012-2304)
- Published
- May 11, 2012
- NVD last modified
- June 16, 2026
- Status
- Modified
EU Vulnerability Database (EUVD)
This vulnerability is also tracked by ENISA as EUVD-2012-2304 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.
View on the EU Vulnerability DatabaseAffected products
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
- php / php
and 69 more…
References
- http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
- http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html
- http://marc.info/?l=bugtraq&m=134012830914727&w=2
- http://secunia.com/advisories/49014
- http://secunia.com/advisories/49085
- http://support.apple.com/kb/HT5501
- http://www.debian.org/security/2012/dsa-2465
- http://www.kb.cert.org/vuls/id/520827(US Government Resource)
- http://www.php.net/ChangeLog-5.php#5.4.3
- http://www.php.net/archive/2012.php#id2012-05-08-1
- http://www.securitytracker.com/id?1027022
- https://bugs.php.net/bug.php?id=61910(Vendor Advisory)
- https://bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff-fix-check.patch&revision=1336093719&display=1
- https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03839862
Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS
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