OS command injection in PHP - CVE-2012-2311
Published: March 14, 2017
Vulnerability identifier: #VU5939
CSH Severity: Critical
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:A/U:Red
CVE-ID: CVE-2012-2311
CWE-ID: CWE-78
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: PHP Group
Affected software:
PHP
PHP
Detailed vulnerability description
The vulnerability allows a remote attacker to execute arbitrary code on the target system.
The weakness exists due to error when parsing QUERY_STRING parameters within PHP-CGI-based application (sapi/cgi/cgi_main.c). A remote attacker can send specially crafted HTTP request with query string, contain a %3D sequence but no = (equals sign) character, inject and execute arbitrary OS commands on vulnerable system with privileges of the web server.
Successful exploitation of the vulnerability results in denial of service or arbitrary code execution on the vulnerable system.
This vulnerability is a result of an incomplete fix for SB2012050301.
Note: the vulnerability was being actively exploited.
The weakness exists due to error when parsing QUERY_STRING parameters within PHP-CGI-based application (sapi/cgi/cgi_main.c). A remote attacker can send specially crafted HTTP request with query string, contain a %3D sequence but no = (equals sign) character, inject and execute arbitrary OS commands on vulnerable system with privileges of the web server.
Successful exploitation of the vulnerability results in denial of service or arbitrary code execution on the vulnerable system.
This vulnerability is a result of an incomplete fix for SB2012050301.
Note: the vulnerability was being actively exploited.
How to mitigate CVE-2012-2311
Update to version 5.3.13 or 5.4.3 or later.