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CVE-2012-1823

9.8 · CRITICALActively Exploited

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…

Published May 11, 2012phpCWE-77EPSS 100.00%

Overview

CVE-2012-1823 is a critical-severity vulnerability affecting php php. It was published on May 11, 2012 and has a CVSS 3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories and patches from php. Update php to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus
phpphp>= 0, < 5.3.12Affected
applemac_os_x>= 10.6.8, < 10.7.5Affected

References

Refeindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/Refh20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041Reflists.apple.com/archives/security-announce/2012/Sep/msg00004.htmlReflists.opensuse.org/opensuse-security-announce/2012-05/msg00002.htmlReflists.opensuse.org/opensuse-security-announce/2012-05/msg00007.htmlReflists.opensuse.org/opensuse-security-announce/2012-05/msg00011.htmlRefmarc.info/?l=bugtraq&m=134012830914727&w=2Refrhn.redhat.com/errata/RHSA-2012-0546.htmlRefrhn.redhat.com/errata/RHSA-2012-0547.htmlRefrhn.redhat.com/errata/RHSA-2012-0568.html

How CyberStrike helps

Frequently asked questions

What is CVE-2012-1823?

CVE-2012-1823 is a critical-severity vulnerability affecting php php. It was published on May 11, 2012 and has a CVSS 3.1 base score of 9.8 (CRITICAL). This vulnerability is listed in CISA's Known Exploited Vulnerabilities catalog, indicating active exploitation in the wild.

How severe is CVE-2012-1823?

This vulnerability has a CVSS 3.1 base score of 9.8, rated CRITICAL. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2012-1823?

Check the references section for vendor advisories and patches from php. Update php to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2012-1823?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2012-1823 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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