CVE-2006-6552 in Blog Cms
Summary
by MITRE
PHP remote file inclusion vulnerability in admin/plugins/NP_UserSharing.php in BLOG:CMS 4.1.3 and earlier allows remote attackers to execute arbitrary PHP code via a URL in the DIR_ADMIN parameter.
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Analysis
by VulDB Data Team • 12/21/2024
The vulnerability identified as CVE-2006-6552 represents a critical remote file inclusion flaw within the BLOG:CMS 4.1.3 content management system and earlier versions. This security weakness resides in the administrative plugin component NP_UserSharing.php, which fails to properly validate or sanitize user-supplied input parameters. The vulnerability specifically affects the DIR_ADMIN parameter, which is used to specify the administrative directory path within the CMS framework. Attackers can exploit this flaw by crafting malicious URLs and injecting them into the DIR_ADMIN parameter, thereby enabling arbitrary code execution on the affected server. The implications of this vulnerability extend beyond simple code injection, as it provides attackers with complete control over the compromised system, potentially allowing for data theft, service disruption, or further network infiltration.
The technical nature of this vulnerability aligns with CWE-88, which describes improper neutralization of special elements used in an OS command, and more specifically with CWE-94, which addresses the execution of arbitrary code or commands. This flaw operates under the principle of insecure direct object reference, where the application directly uses user-supplied input to construct file paths without adequate validation. The vulnerability demonstrates a classic lack of input sanitization and proper parameter validation, allowing attackers to manipulate the application's behavior by injecting malicious URLs. The exploitation process requires minimal technical expertise, making it particularly dangerous as it can be leveraged by attackers with varying skill levels. The vulnerability exists because the application does not properly filter or escape the DIR_ADMIN parameter before using it in file inclusion operations, creating an attack surface that directly enables remote code execution.
The operational impact of CVE-2006-6552 is severe and multifaceted, affecting both the availability and integrity of the compromised CMS system. Successful exploitation can result in complete system compromise, allowing attackers to execute arbitrary commands with the privileges of the web server process. This can lead to data breaches, unauthorized access to sensitive information, and potential use of the compromised server for further attacks against other systems. Organizations running affected versions of BLOG:CMS face significant risk of service disruption, as attackers can manipulate the CMS functionality to redirect traffic, modify content, or disable critical services. The vulnerability also poses a risk to network security posture, as the compromised system can serve as a pivot point for lateral movement within the network infrastructure. Additionally, the presence of this vulnerability can lead to regulatory compliance violations, especially in industries with strict data protection requirements such as healthcare or financial services, where unauthorized access to systems and data is strictly prohibited.
Mitigation strategies for CVE-2006-6552 must address both immediate remediation and long-term security improvements to prevent similar vulnerabilities. The primary recommendation involves upgrading to a patched version of BLOG:CMS that resolves this vulnerability, as the original developers have likely released security updates addressing the insecure parameter handling. Organizations should implement proper input validation and sanitization measures, ensuring that all user-supplied parameters undergo rigorous filtering before being processed by the application. The principle of least privilege should be enforced by configuring the web server with minimal necessary permissions and avoiding execution of code from user-controllable paths. Network segmentation and firewall rules can help limit access to administrative interfaces, reducing the attack surface for this type of vulnerability. Additionally, implementing web application firewalls and intrusion detection systems can provide additional layers of protection by monitoring for suspicious patterns in HTTP requests that may indicate exploitation attempts. Regular security audits and penetration testing should be conducted to identify and remediate similar vulnerabilities in other applications and systems within the organization's infrastructure, following security frameworks such as those outlined in the NIST Cybersecurity Framework or ISO 27001 standards for comprehensive security management.