PbootCMS is an open-source PHP-based content management system designed for building and managing enterprise websites. It is widely used by web developers and IT professionals for its simplicity, flexibility, and strong community support. The system enables efficient site management, content updates, and integration of additional features, making it suitable for both large enterprises and small businesses seeking cost-free web solutions.
Remote Code Execution (RCE) is a critical vulnerability that allows attackers to execute arbitrary commands on a target server from a remote location. In PbootCMS version 3.1.2, this flaw arises from improper sanitization of user-supplied input in specific URL parameters, enabling code injection. The vulnerability is particularly dangerous as it bypasses standard access controls and can lead to full system compromise.
Specifically, the vulnerability exists in the handling of the 'extract' parameter within the core PHP files of PbootCMS. Attackers can craft a malicious request to the vulnerable endpoint, injecting PHP code that gets executed by the server. This parameter is used for template parsing, and without proper validation, it becomes a vector for arbitrary code execution.
If exploited, an attacker can gain complete control over the affected server, including the ability to read, modify, or delete sensitive data, install malware, pivot to internal networks, and disrupt services. Given the CVSS score of 9.0, this vulnerability poses a severe risk to any organization using PbootCMS v3.1.2, potentially leading to data breaches and operational downtime.
- Upgrade PbootCMS to the latest patched version immediately.
- Implement strict input validation and sanitization for all URL parameters, especially 'extract'.
- Disable dangerous PHP functions like eval(), system(), and exec() in the server configuration.
- Apply a Web Application Firewall (WAF) with rules to block malicious code injection attempts.
- Conduct regular security audits and penetration testing to identify similar vulnerabilities.
- Monitor server logs for unusual activity, such as unexpected parameter usage or command execution.
- Restrict file permissions to prevent unauthorized modification of core CMS files.
- Use a content security policy (CSP) to mitigate the impact of code injection attacks.
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