Public Date:
818907: CVE-2012-2311 php: incomplete CVE-2012-1823 fix - incorrect check for =

The MITRE CVE dictionary describes this issue as:

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.

Find out more about CVE-2012-2311 from the MITRE CVE dictionary dictionary and NIST NVD.


Not vulnerable. Red Hat did not release PHP package updates addressing CVE-2012-1823 that introduce the CVE-2012-2311 issue. Therefore, this CVE does not affect any Red Hat products.

CVSS v2 metrics

NOTE: The following CVSS v2 metrics and score provided are preliminary and subject to review.

Base Score 6.8
Base Metrics AV:N/AC:M/Au:N/C:P/I:P/A:P
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial

Find out more about Red Hat support for the Common Vulnerability Scoring System (CVSS).

Affected Packages State

Platform Package State
Red Hat Enterprise Linux 4 php Not affected
Red Hat Enterprise Linux 6 php Not affected
Red Hat Enterprise Linux 3 php Not affected
Red Hat Enterprise Linux 5 php Not affected
Red Hat Enterprise Linux 5 php53 Not affected