CVE-2006-0565 in Loudblog
Summary
by MITRE
PHP remote file include vulnerability in inc/backend_settings.php in Loudblog 0.4 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the $GLOBALS[path] parameter.
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Analysis
by VulDB Data Team • 06/13/2019
The vulnerability identified as CVE-2006-0565 represents a critical remote file inclusion flaw in the Loudblog content management system version 0.4 and earlier. This vulnerability resides within the inc/backend_settings.php file and stems from improper input validation mechanisms that fail to sanitize user-supplied data before processing. The flaw specifically manifests when the application accepts a URL through the $GLOBALS[path] parameter without adequate verification, creating an exploitable condition that enables remote attackers to inject and execute arbitrary PHP code on the target system. Such a vulnerability fundamentally undermines the application's security posture by providing an attack vector that bypasses normal execution boundaries and allows for complete system compromise.
The technical nature of this vulnerability aligns with CWE-98, which describes improper control of code generation capabilities, and specifically exemplifies a remote file inclusion attack pattern that falls under the ATT&CK technique T1190 for exploitation of remote services. The flaw operates by allowing an attacker to manipulate the $GLOBALS[path] parameter to reference a remote URL containing malicious PHP code. When the application processes this parameter without proper sanitization, it executes the remote code as if it were part of the local application, effectively granting the attacker complete control over the server. This type of vulnerability is particularly dangerous because it enables attackers to establish persistent backdoors, exfiltrate data, or perform further lateral movement within the network infrastructure.
The operational impact of CVE-2006-0565 extends far beyond simple code execution, as it provides attackers with complete system compromise capabilities that can result in data breaches, service disruption, and potential lateral movement to adjacent systems. Organizations running affected versions of Loudblog face significant risks including unauthorized access to sensitive data, modification of web content, and establishment of persistent access points for future attacks. The vulnerability's remote nature means that attackers can exploit it from anywhere on the internet without requiring physical access to the target system, making it particularly attractive for automated attack campaigns. Additionally, the lack of input validation creates a pathway for attackers to potentially escalate privileges and gain root access to the underlying operating system.
Mitigation strategies for this vulnerability must address both immediate remediation and long-term security improvements. The primary recommendation involves upgrading to a patched version of Loudblog that properly validates and sanitizes all user input parameters, specifically the $GLOBALS[path] variable. Organizations should implement input validation controls that reject any non-local paths or URLs that do not conform to strict whitelisting criteria. Network-level protections including firewalls and intrusion detection systems should be configured to monitor for suspicious URL patterns and outbound connections to known malicious domains. Security hardening practices should include disabling remote file inclusion features in PHP configuration, implementing proper access controls, and establishing regular security audits. Additionally, organizations should consider implementing web application firewalls to detect and block exploitation attempts targeting this specific vulnerability pattern. The remediation process must also include comprehensive testing to ensure that all input parameters are properly sanitized and that no other similar vulnerabilities exist within the application codebase.