SB2012050601 - Remote command injection in PHP
Published: May 6, 2012
Security Bulletin ID
SB2012050601
Severity
Critical
Patch available
YES
Number of vulnerabilities
1
Exploitation vector
Remote access
Highest impact
Code execution
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 1 security vulnerability.
1) OS command injection (CVE-ID: CVE-2012-2311)
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.
Remediation
Install update from vendor's website.