CVE-2020-20944 in Qibosoft
Summary
by MITRE • 12/28/2021
An issue in /admin/index.php?lfj=mysql&action=del of Qibosoft v7 allows attackers to arbitrarily delete files.
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Analysis
by VulDB Data Team • 12/31/2021
The vulnerability identified as CVE-2020-20944 represents a critical file deletion flaw within the Qibosoft v7 content management system administration interface. This vulnerability exists in the administrative file management component where attackers can exploit a lack of proper input validation and authorization checks to execute arbitrary file deletion operations. The affected endpoint /admin/index.php?lfj=mysql&action=del demonstrates a clear path for unauthorized users to manipulate the file deletion functionality, potentially leading to complete system compromise through strategic file removal.
This vulnerability stems from insufficient sanitization of user-supplied input parameters within the file management system. The application fails to properly validate the file paths and names submitted through the action parameter, allowing attackers to craft malicious requests that bypass normal file access controls. The flaw essentially enables path traversal and arbitrary file deletion capabilities, which aligns with CWE-22 Path Traversal and CWE-77 Path Traversal vulnerabilities. The root cause lies in the application's failure to implement proper access controls and input validation mechanisms before processing file deletion requests.
The operational impact of this vulnerability extends far beyond simple file removal, as it provides attackers with a powerful tool for system disruption and potential complete compromise. An attacker who gains access to the administrative interface can delete critical system files including configuration files, database connection scripts, application binaries, and even system libraries. This arbitrary deletion capability can result in complete system outages, data loss, and potentially provide a foothold for further exploitation. The vulnerability essentially grants attackers the ability to perform a denial of service attack at the file system level, with potential for privilege escalation if system files are targeted.
Mitigation strategies for CVE-2020-20944 should focus on implementing comprehensive input validation and access control measures. Organizations must ensure that all file operations within administrative interfaces require proper authentication and authorization checks before execution. The implementation of proper parameter sanitization and validation should prevent malicious path traversal attempts, while maintaining strict file access controls that limit file operations to authorized users only. Additionally, the system should implement proper logging of all file operations to detect and respond to unauthorized attempts. This vulnerability also highlights the importance of following security best practices outlined in the ATT&CK framework, particularly in the privilege escalation and defense evasion categories, as attackers can leverage such flaws to maintain persistent access and avoid detection through file deletion operations.