CVE-2007-0171 in AllMyLinks
Summary
by MITRE
PHP remote file inclusion vulnerability in index.php in AllMyLinks 0.5.0 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the AML_opensite parameter.
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Analysis
by VulDB Data Team • 08/16/2024
The vulnerability identified as CVE-2007-0171 represents a critical remote file inclusion flaw in the AllMyLinks web application version 0.5.0 and earlier. This vulnerability exists within the index.php file where the AML_opensite parameter is processed without proper input validation, creating an exploitable condition that allows malicious actors to inject and execute arbitrary PHP code on the target server. The flaw stems from the application's failure to sanitize user-supplied input before incorporating it into dynamic file inclusion operations.
This vulnerability falls under the Common Weakness Enumeration category CWE-95, which specifically addresses improper neutralization of directives in dynamically evaluated code. The issue demonstrates a classic remote code execution vulnerability where attackers can manipulate the AML_opensite parameter to reference malicious URLs containing PHP payloads. The vulnerability operates at the application layer and can be exploited through HTTP requests that include crafted URLs in the parameter, bypassing normal security controls that would typically prevent such code injection.
The operational impact of this vulnerability is severe as it provides attackers with complete control over the affected server. Successful exploitation enables remote code execution, allowing threat actors to install backdoors, steal sensitive data, modify website content, or use the compromised server as a launchpad for further attacks within the network. The vulnerability affects any system running AllMyLinks 0.5.0 or earlier versions, making it particularly dangerous in environments where multiple installations exist. The attack surface is broad since the vulnerability can be exploited through simple web requests without requiring authentication or special privileges.
Mitigation strategies for CVE-2007-0171 must focus on immediate application patching and input validation enforcement. Organizations should upgrade to AllMyLinks versions that address this vulnerability, as the original developers have released fixes that properly validate and sanitize the AML_opensite parameter. Additionally, implementing proper input validation techniques including whitelisting acceptable values, using allowlists for file paths, and employing secure coding practices can prevent similar vulnerabilities. Network-level defenses such as web application firewalls and intrusion prevention systems can provide additional protection layers, though they should not be relied upon as the sole defense mechanism. The vulnerability also aligns with ATT&CK technique T1190, which covers exploitation of remote services, and T1059, covering command and scripting interpreter, highlighting the need for comprehensive security measures across multiple attack vectors.