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Critical 9.8Known exploited (CISA KEV)Published May 11, 2012
CVE-2012-1823sapi/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 al…
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It affects php and 16 other products. Add what you run to find out whether that includes you.
CISA lists it as known exploited since Mar 25, 2022; federal agencies had to remediate by Apr 15, 2022. Treat that date as your deadline.
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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
- 9.8 CRITICAL (v3.1, CISA ADP)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- Weakness (CWE)
- CWE-77
- Known exploited
- Added to CISA KEV Mar 25, 2022; federal remediation due Apr 15, 2022Apply updates per vendor instructions.
- EPSS (exploitation in the next 30 days)
- 100.00% (percentile 100)
- Assigned by
- certcc
- NVD analysis
- Analyzed
- Record last updated
- Nov 4, 2025
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
php php php:php | before 5.3.12; from 5.4.0 before 5.4.2 | NVD |
fedoraproject fedora fedoraproject:fedora | 39; 40 | NVD |
debian debian_linux debian:debian_linux | 6.0 | NVD |
hp hp-ux hp:hp-ux | b.11.23; b.11.31 | NVD |
opensuse opensuse opensuse:opensuse | 11.4; 12.1 | NVD |
suse linux_enterprise_server suse:linux_enterprise_server | 10; 11; 11 | NVD |
suse linux_enterprise_software_development_kit suse:linux_enterprise_software_development_kit | 10; 11 | NVD |
apple mac_os_x apple:mac_os_x | from 10.6.8 before 10.7.5; from 10.8.0 before 10.8.2 | NVD |
redhat application_stack redhat:application_stack | 2.0 | NVD |
redhat gluster_storage_server_for_on-premise redhat:gluster_storage_server_for_on-premise | 2.0 | NVD |
redhat storage redhat:storage | 2.0 | NVD |
redhat storage_for_public_cloud redhat:storage_for_public_cloud | 2.0 | NVD |
redhat enterprise_linux_desktop redhat:enterprise_linux_desktop | 6.0 | NVD |
redhat enterprise_linux_eus redhat:enterprise_linux_eus | 5.6; 6.1; 6.2 | NVD |
redhat enterprise_linux_server redhat:enterprise_linux_server | 5.0; 6.0 | NVD |
redhat enterprise_linux_server_aus redhat:enterprise_linux_server_aus | 5.3; 5.6 | NVD |
redhat enterprise_linux_workstation redhat:enterprise_linux_workstation | 5.0; 6.0 | NVD |
References
- http://marc.info/?l=bugtraq&m=134012830914727&w=2vendor-advisory, mailing-list
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.htmlvendor-advisory, mailing-list, third-party-advisory
- http://www.securitytracker.com/id?1027022vdb-entry, broken-link, third-party-advisory
- http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041vendor-advisory, broken-link
- http://www.mandriva.com/security/advisories?name=MDVSA-2012:068vendor-advisory, broken-link
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.htmlvendor-advisory, mailing-list, third-party-advisory
- http://rhn.redhat.com/errata/RHSA-2012-0546.htmlvendor-advisory, third-party-advisory
- http://rhn.redhat.com/errata/RHSA-2012-0568.htmlvendor-advisory, third-party-advisory
- http://rhn.redhat.com/errata/RHSA-2012-0569.htmlvendor-advisory, third-party-advisory
- http://www.php.net/ChangeLog-5.php#5.4.2exploit, patch, release-notes
- http://secunia.com/advisories/49014third-party-advisory, broken-link
- http://rhn.redhat.com/errata/RHSA-2012-0570.htmlvendor-advisory, third-party-advisory
- http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.htmlvendor-advisory, mailing-list, third-party-advisory
- https://bugs.php.net/bug.php?id=61910
- http://www.kb.cert.org/vuls/id/673343third-party-advisory, us-government-resource
- http://rhn.redhat.com/errata/RHSA-2012-0547.htmlvendor-advisory, third-party-advisory
- http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.htmlvendor-advisory, mailing-list, third-party-advisory
- http://support.apple.com/kb/HT5501third-party-advisory
- http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/broken-link, exploit
- http://secunia.com/advisories/49065third-party-advisory, broken-link
- http://www.kb.cert.org/vuls/id/520827third-party-advisory, exploit, us-government-resource
- https://bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff&revision=1335984315&display=1
- http://www.debian.org/security/2012/dsa-2465vendor-advisory, third-party-advisory
- http://secunia.com/advisories/49085third-party-advisory, broken-link
- http://www.php.net/archive/2012.php#id2012-05-03-1release-notes
- http://secunia.com/advisories/49087broken-link
- http://www.openwall.com/lists/oss-security/2024/06/07/1mailing-list
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.