CVE-2007-2943 in Webavis
Summary
by MITRE
PHP remote file inclusion vulnerability in class/class.php in Webavis 0.1.1 allows remote attackers to execute arbitrary PHP code via a URL in the root parameter.
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Analysis
by VulDB Data Team • 09/18/2024
The vulnerability identified as CVE-2007-2943 represents a critical remote file inclusion flaw in the Webavis 0.1.1 content management system that fundamentally undermines the application's security posture. This vulnerability exists within the class/class.php file where the application fails to properly validate or sanitize user-supplied input passed through the root parameter. The flaw enables attackers to inject malicious URLs that are then included and executed as PHP code on the target server, creating a severe vector for remote code execution.
From a technical perspective this vulnerability maps directly to CWE-88, which describes improper neutralization of special elements used in an expression, specifically addressing the dangerous practice of incorporating untrusted data into file inclusion operations. The vulnerability operates at the intersection of input validation failure and dynamic code execution, where the root parameter accepts user input without adequate sanitization or validation. Attackers can exploit this by crafting malicious URLs that, when passed to the vulnerable parameter, cause the PHP interpreter to include and execute remote code from attacker-controlled servers.
The operational impact of this vulnerability extends far beyond simple code execution, as it provides adversaries with complete control over the affected server. Once successfully exploited, attackers can establish persistent backdoors, escalate privileges, exfiltrate sensitive data, and use the compromised system as a launch point for further attacks within the network. The vulnerability's remote nature means that exploitation can occur from anywhere on the internet without requiring local access or prior authentication, making it particularly dangerous for publicly accessible web applications. This aligns with ATT&CK technique T1190, which describes the use of remote services for initial access, and T1059, covering the execution of code through command and scripting interpreters.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term architectural improvements. The most effective immediate solution involves patching the application to version 0.1.2 or later, which contains the necessary input validation fixes. Organizations should also implement strict input validation measures that reject any non-local file paths and sanitize all user-supplied parameters. Additionally, the principle of least privilege should be enforced by configuring web servers to restrict file inclusion operations and disable remote file inclusion capabilities entirely through php.ini settings. Network-level protections such as web application firewalls can provide additional detection and prevention capabilities, while regular security audits and code reviews should be implemented to identify similar vulnerabilities in other applications. The vulnerability serves as a stark reminder of the importance of proper input validation and the dangers of allowing user input to directly influence file inclusion operations, reinforcing the security principle that all external input must be treated as potentially malicious and thoroughly validated before processing.