CVE-2006-2695 in DGNews
Summary
by MITRE
admin/upprocess.php in DGNews 1.5 and earlier allows remote attackers to execute arbitrary code by uploading scripts with arbitrary extensions to the img directory.
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Analysis
by VulDB Data Team • 07/27/2018
The vulnerability identified as CVE-2006-2695 affects DGNews version 1.5 and earlier, presenting a critical security flaw in the administrative upload processing functionality. This issue resides within the admin/upprocess.php file which handles file uploads for the news management system. The vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly restrict file types during the upload process. Remote attackers can exploit this weakness by uploading malicious scripts with various file extensions directly to the img directory, bypassing normal security restrictions that should prevent execution of potentially harmful code.
The technical flaw represents a classic file upload vulnerability that falls under the category of insecure file handling and improper access control. This vulnerability enables attackers to upload executable scripts such as php, asp, or other server-side includes that can be executed within the web server context. The issue occurs because the application does not properly validate file extensions or content type headers, nor does it implement adequate file name sanitization. The img directory serves as the target upload location where the malicious files can be stored and subsequently accessed through web requests, allowing for arbitrary code execution on the target server.
The operational impact of this vulnerability is severe as it provides attackers with complete control over the affected system. Once successful, the vulnerability allows for remote code execution which can lead to full system compromise, data exfiltration, and persistence mechanisms. Attackers can upload web shells or backdoor scripts that enable them to maintain long-term access to the compromised server. The vulnerability affects the integrity and confidentiality of the entire web application and underlying system, as the attacker can execute commands with the privileges of the web server process. This creates a significant risk for organizations relying on DGNews for content management, as the compromise can extend to other systems within the network through lateral movement.
Mitigation strategies should focus on implementing robust file upload validation and sanitization measures. Organizations should immediately upgrade to DGNews versions that address this vulnerability, as the vendor has likely released patches or updates. The recommended approach includes implementing strict file type validation that only accepts known safe file extensions and content types while rejecting executable scripts. Additional security controls should include renaming uploaded files with random identifiers, storing uploaded files outside the web root directory, and implementing proper access controls for the upload directory. The solution aligns with security best practices outlined in the OWASP Top Ten and follows the principle of least privilege. Organizations should also implement network monitoring to detect suspicious file upload activities and conduct regular security assessments to identify similar vulnerabilities in other applications. This vulnerability demonstrates the importance of proper input validation and secure coding practices, as outlined in CWE-434 which specifically addresses insecure file upload scenarios. The ATT&CK framework categorizes this as a file upload attack vector that can lead to privilege escalation and persistent access, making it a critical concern for security teams implementing defense-in-depth strategies.