CVE-2022-48079 in aaPanel host system
Summary
by MITRE • 02/02/2023
Monnai aaPanel host system v1.5 contains an access control issue which allows attackers to escalate privileges and execute arbitrary code via uploading a crafted PHP file to the virtual host directory of the system.
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Analysis
by VulDB Data Team • 03/04/2023
The CVE-2022-48079 vulnerability affects the Monnai aaPanel host system version 1.5 and represents a critical access control flaw that enables attackers to achieve privilege escalation and arbitrary code execution. This vulnerability stems from insufficient file upload validation mechanisms within the virtual host directory management functionality of the panel. The flaw allows malicious actors to bypass intended security restrictions and upload malicious PHP files that can be executed within the system's context. The vulnerability is particularly concerning as it directly compromises the integrity and confidentiality of the affected system, potentially leading to complete system compromise and unauthorized access to sensitive data.
The technical implementation of this vulnerability involves a failure in input validation and access control enforcement during file upload operations. When users attempt to upload files to virtual host directories, the system does not properly validate the file types or content, allowing attackers to upload PHP files that contain malicious code. This weakness aligns with CWE-434 which describes insecure file upload vulnerabilities where applications accept files without proper validation, and CWE-284 which addresses improper access control mechanisms. The vulnerability exists at the application layer where the panel's file handling logic fails to enforce proper authorization checks before allowing file uploads to proceed.
The operational impact of this vulnerability extends beyond simple privilege escalation to encompass full system compromise and potential data exfiltration. Once an attacker successfully uploads a malicious PHP file, they can execute arbitrary code with the privileges of the web server process, which typically runs with elevated permissions. This could enable attackers to establish persistent backdoors, modify system configurations, access databases, steal sensitive information, or use the compromised system as a launch point for further attacks within the network. The vulnerability affects the availability, integrity, and confidentiality of the system according to the CIA triad principles, making it a severe threat to organizational security posture.
Mitigation strategies for CVE-2022-48079 should focus on immediate patching of the affected aaPanel version 1.5 and implementation of robust file upload restrictions. Organizations should enforce strict file type validation and content inspection before allowing uploads to virtual host directories. The system should implement proper access control mechanisms that verify user permissions before permitting file operations and restrict upload directories to prevent execution of uploaded files in web-accessible locations. Network segmentation and monitoring solutions should be deployed to detect suspicious file upload activities and unauthorized code execution attempts. Additionally, implementing the principle of least privilege for web server processes and regular security audits of file upload functionalities will help prevent similar vulnerabilities from emerging in the future. This vulnerability demonstrates the importance of following secure coding practices and adhering to ATT&CK framework principles for preventing privilege escalation and code execution attacks through file upload mechanisms.