CVE-2022-22929 in MCMS
Summary
by MITRE • 01/21/2022
MCMS v5.2.4 was discovered to have an arbitrary file upload vulnerability in the New Template module, which allows attackers to execute arbitrary code via a crafted ZIP file.
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Analysis
by VulDB Data Team • 01/16/2024
The vulnerability identified as CVE-2022-22929 affects MCMS version 5.2.4 and represents a critical arbitrary file upload flaw within the New Template module. This vulnerability stems from inadequate input validation and sanitization mechanisms that fail to properly inspect or restrict file types during the template upload process. The flaw enables remote attackers to bypass security controls and upload malicious files that can subsequently be executed on the target system. The vulnerability specifically manifests when the application processes ZIP archives containing crafted payloads, allowing attackers to deploy malicious code without authentication or authorization.
The technical implementation of this vulnerability aligns with CWE-434, which describes insecure file upload vulnerabilities where applications fail to properly validate or restrict file types during upload operations. The flaw operates by permitting attackers to upload ZIP archives that contain executable files or scripts that the application subsequently processes or extracts. This creates a path for code execution that can be leveraged to gain unauthorized access to the system. The vulnerability exists because the application does not adequately verify the contents of uploaded ZIP files or enforce strict file type restrictions, allowing malicious payloads to be silently accepted and processed.
From an operational perspective, this vulnerability presents a severe risk to organizations utilizing MCMS v5.2.4 as it enables remote code execution without requiring authentication. Attackers can exploit this weakness to deploy web shells, backdoors, or other malicious payloads that provide persistent access to the compromised system. The impact extends beyond immediate code execution to include potential privilege escalation, data exfiltration, and system compromise. The vulnerability can be exploited through a simple web interface interaction, making it particularly dangerous as it requires minimal technical expertise to exploit and can be automated for large-scale attacks.
Security mitigations for CVE-2022-22929 should focus on implementing strict file validation and sanitization measures within the template upload module. Organizations must enforce comprehensive file type checking that validates both file extensions and MIME types against a whitelist of approved formats. The application should implement proper content inspection of uploaded ZIP archives to prevent execution of malicious files during extraction. Additionally, access controls should be strengthened to limit template upload functionality to authorized users only, and input validation should be enhanced to reject any suspicious file characteristics. The vulnerability also maps to ATT&CK technique T1190, which covers exploiting vulnerabilities in web applications to gain initial access and establish persistence within target environments. Organizations should consider implementing network segmentation and monitoring solutions to detect suspicious file upload activities and potential exploitation attempts.