CVE-2012-2311

Description

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.

Category

7.5
CVSS
Severity: High
CVSS 2.0 •
EPSS 91.44% Top 5%
Vendor Advisory marc.info Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory opensuse.org Vendor Advisory apple.com Vendor Advisory hp.com Vendor Advisory debian.org Vendor Advisory php.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://marc.info/?l=bugtraq&m=134012830914727&w=2 vendor advisory
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00011.html vendor advisory
http://www.securitytracker.com/id?1027022 vdb entry
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00002.html vendor advisory
https://bugs.php.net/patch-display.php?bug_id=61910&patch=cgi.diff-fix-check.patch&revision=1336093719&display=1
http://secunia.com/advisories/49014 third party advisory
http://lists.opensuse.org/opensuse-security-announce/2012-05/msg00007.html vendor advisory
https://bugs.php.net/bug.php?id=61910 vendor advisory
http://www.php.net/archive/2012.php#id2012-05-08-1
http://lists.apple.com/archives/security-announce/2012/Sep/msg00004.html vendor advisory
http://support.apple.com/kb/HT5501
https://h20564.www2.hp.com/portal/site/hpsc/public/kb/docDisplay?docId=emr_na-c03839862 vendor advisory
http://eindbazen.net/2012/05/php-cgi-advisory-cve-2012-1823/
http://www.kb.cert.org/vuls/id/520827 third party advisory us government resource
http://www.debian.org/security/2012/dsa-2465 vendor advisory
http://secunia.com/advisories/49085 third party advisory
http://www.php.net/ChangeLog-5.php#5.4.3

Frequently Asked Questions

What is the severity of CVE-2012-2311?
CVE-2012-2311 has been scored as a high severity vulnerability.
How to fix CVE-2012-2311?
To fix CVE-2012-2311, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2012-2311 being actively exploited in the wild?
It is possible that CVE-2012-2311 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~91% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
This platform uses data from the NIST NVD, MITRE CVE, MITRE CWE, First.org and CISA KEV but is not endorsed or certified by these entities. CVE is a registred trademark of the MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. CWE is a registred trademark of the MITRE Corporation and the authoritative source of CWE content is MITRE's CWE web site.
© 2025 Under My Watch. All Rights Reserved.