CVE-2006-6694 in E-Uploader Pro
Summary
by MITRE
Directory traversal vulnerability in include/config.php in E-Uploader Pro 1.0 and earlier allows remote attackers to execute arbitrary PHP code via a .. (dot dot) in the language parameter, as demonstrated by uploading a .JPG file containing PHP code, then accessing the file via config.php.
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Analysis
by VulDB Data Team • 12/21/2024
The vulnerability described in CVE-2006-6694 represents a critical directory traversal flaw in the E-Uploader Pro 1.0 content management system that exposes systems to remote code execution attacks. This vulnerability exists within the include/config.php file where the application fails to properly validate or sanitize user input parameters, specifically the language parameter that controls the application's language configuration. The flaw allows attackers to manipulate the path traversal mechanism by injecting .. (dot dot) sequences into the language parameter, enabling them to access files outside the intended directory structure. This directory traversal vulnerability directly maps to CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal or directory traversal attacks. The attack vector is particularly dangerous because it leverages the application's legitimate file inclusion mechanisms to execute arbitrary PHP code, bypassing normal access controls and security boundaries.
The operational impact of this vulnerability extends far beyond simple data exposure, as it provides attackers with complete control over the affected system. By exploiting the directory traversal flaw, an attacker can upload a malicious file containing PHP code disguised as a .JPG image and then access this file through the vulnerable config.php endpoint. This technique allows for persistent code execution, enabling attackers to establish backdoors, escalate privileges, or perform further reconnaissance within the compromised environment. The vulnerability demonstrates a classic attack pattern that aligns with ATT&CK technique T1059.007 for command and scripting interpreter, where adversaries leverage web application vulnerabilities to execute malicious code remotely. The security implications are severe because the vulnerability affects the core configuration file handling mechanism, potentially allowing attackers to modify critical application settings, access sensitive configuration data, or gain unauthorized access to the underlying server infrastructure.
The mitigation strategies for this vulnerability must address both the immediate code-level flaws and establish broader security controls to prevent similar issues in the future. Organizations should implement proper input validation and sanitization techniques that strictly filter or reject any path traversal sequences in user-supplied parameters before they are processed by the application. This includes implementing whitelisting mechanisms for language parameters and ensuring that all file operations are performed within explicitly defined and restricted directories. Additionally, the application should employ proper access controls and file permission settings to prevent unauthorized file uploads and execution of arbitrary code. Security measures should also include regular code reviews and security testing to identify similar vulnerabilities in other components, as well as implementing web application firewalls to detect and block suspicious traversal attempts. The remediation process requires immediate patching of the vulnerable E-Uploader Pro version or complete replacement with a secure alternative, as the vulnerability fundamentally compromises the integrity and security of the entire application stack. Organizations should also consider implementing monitoring and logging controls to detect unauthorized file access attempts and potential exploitation of similar directory traversal vulnerabilities.