CVE-2006-6445 in Envolution
Summary
by MITRE
Directory traversal vulnerability in error.php in Envolution 1.1.0 and earlier allows remote attackers to include and execute arbitrary local files via a .. (dot dot) in the PNSVlang (PNSV lang) parameter, as demonstrated by injecting PHP sequences into an Apache HTTP Server log file, which is then included by error.php.
If you want to get best quality of vulnerability data, you may have to visit VulDB.
Analysis
by VulDB Data Team • 08/10/2024
The vulnerability identified as CVE-2006-6445 represents a critical directory traversal flaw within the Envolution content management system version 1.1.0 and earlier. This vulnerability resides in the error.php script which processes user input through the PNSVlang parameter without proper validation or sanitization. The flaw enables remote attackers to manipulate file inclusion mechanisms by exploiting the .. (dot dot) sequence, allowing them to traverse directory structures and access arbitrary local files on the server. The vulnerability is particularly concerning because it can be exploited through log file manipulation, creating a sophisticated attack vector that leverages the application's own logging mechanisms against itself.
The technical implementation of this vulnerability stems from improper input validation in the error.php script where the PNSVlang parameter is directly used in file inclusion operations without adequate sanitization. When an attacker injects PHP code into Apache log files through malicious requests, the error.php script subsequently includes these log files during error processing, executing the injected code within the context of the web server. This represents a classic path traversal vulnerability that aligns with CWE-22, which specifically addresses improper limitation of a pathname to a restricted directory. The attack chain involves three distinct phases: initial log injection, subsequent file inclusion by error.php, and code execution, making it a multi-stage exploitation technique.
The operational impact of this vulnerability extends beyond simple code execution to encompass complete system compromise and data exfiltration capabilities. Attackers can leverage this vulnerability to access sensitive system files, configuration data, and potentially gain administrative access to the web application. The log file injection technique demonstrates sophisticated attack methodology that exploits the trust relationship between the web server and its logging mechanisms. This vulnerability directly maps to several ATT&CK techniques including T1059 for command and scripting interpreter and T1566 for phishing with malicious attachments, as the attack vector often involves user interaction to trigger log injection. The vulnerability also relates to T1083 for file and directory discovery and T1213 for data from information repositories, as attackers can enumerate system resources and extract valuable information.
Mitigation strategies for CVE-2006-6445 must address both the immediate vulnerability and broader security posture of the affected system. The primary remediation involves implementing proper input validation and sanitization of all user-supplied parameters, particularly those used in file inclusion operations. Organizations should employ allow-list validation for language parameters and avoid direct file path manipulation based on user input. Additionally, implementing proper access controls and file permissions can limit the impact of successful exploitation attempts. The solution aligns with security best practices outlined in OWASP Top 10 and NIST cybersecurity frameworks, specifically addressing the prevention of path traversal attacks through proper input filtering and secure coding practices. System administrators should also implement log monitoring and anomaly detection to identify potential exploitation attempts and maintain regular security updates to prevent similar vulnerabilities from persisting in the environment.