CVE-2022-30508 in DedeCMS
Summary
by MITRE • 05/26/2022
DedeCMS v5.7.93 was discovered to contain arbitrary file deletion vulnerability in upload.php via the delete parameter.
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Analysis
by VulDB Data Team • 06/01/2022
The vulnerability identified as CVE-2022-30508 affects DedeCMS version 5.7.93 and represents a critical arbitrary file deletion flaw within the upload.php script. This vulnerability specifically manifests through the delete parameter, which allows unauthorized users to manipulate file deletion operations on the target system. The issue stems from insufficient input validation and access control mechanisms within the content management system's file handling functionality.
This arbitrary file deletion vulnerability falls under CWE-22, which describes improper limitation of a pathname to a restricted directory, commonly known as path traversal attacks. The flaw enables attackers to delete arbitrary files on the server by exploiting the delete parameter in the upload.php endpoint. The vulnerability's severity is amplified by the fact that it operates without proper authentication checks or authorization verification, making it particularly dangerous in production environments where administrative privileges might be compromised.
The operational impact of this vulnerability extends beyond simple file deletion capabilities. Attackers can leverage this flaw to remove critical system files, web application components, or even sensitive configuration data that could lead to complete system compromise. The vulnerability creates a persistent threat vector that can be exploited repeatedly, potentially allowing attackers to establish long-term presence on the compromised system. Security professionals should note that this issue affects the core file management functionality of DedeCMS, which is fundamental to content management operations.
From an attack perspective, this vulnerability aligns with techniques described in the MITRE ATT&CK framework under the T1078 credential access and T1486 data destruction tactics. The flaw enables unauthorized file manipulation that can disrupt service availability and potentially lead to complete system compromise. Organizations utilizing DedeCMS v5.7.93 should immediately implement mitigations including input validation, access control restrictions, and comprehensive monitoring of file operations. The vulnerability demonstrates the critical importance of proper parameter validation in web applications and highlights the need for robust security controls in content management systems. System administrators should also consider implementing web application firewalls and restricting file upload capabilities to prevent exploitation of similar vulnerabilities in the future.
The remediation approach should focus on patching the affected DedeCMS version to the latest stable release, implementing proper input sanitization for the delete parameter, and enforcing strict access controls on file management operations. Additionally, organizations should conduct thorough security assessments of their web applications to identify similar vulnerabilities and establish comprehensive monitoring protocols to detect unauthorized file manipulation attempts.