CVE-2024-29272 in VvvebJs
Summary
by MITRE • 03/22/2024
Arbitrary File Upload vulnerability in VvvebJs before version 1.7.5, allows unauthenticated remote attackers to execute arbitrary code and obtain sensitive information via the sanitizeFileName parameter in save.php.
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Analysis
by VulDB Data Team • 08/02/2024
The vulnerability CVE-2024-29272 represents a critical arbitrary file upload flaw in VvvebJs version 1.7.4 and earlier, which exposes systems to remote code execution and information disclosure risks. This vulnerability specifically affects the sanitizeFileName parameter within the save.php endpoint, creating a pathway for unauthenticated attackers to bypass file validation mechanisms and upload malicious payloads to the target system.
The technical implementation of this vulnerability stems from insufficient input validation and sanitization of filename parameters within the file upload functionality. Attackers can manipulate the sanitizeFileName parameter to specify arbitrary file paths and names, potentially allowing them to overwrite existing system files or upload backdoor scripts that can execute with the privileges of the web application. The vulnerability falls under CWE-434 which categorizes insecure file upload handling, where the application fails to properly validate or sanitize user-supplied filenames, leading to potential arbitrary file write operations.
From an operational perspective, this vulnerability enables attackers to achieve remote code execution without requiring authentication credentials, significantly expanding the attack surface and reducing the complexity of exploitation. The impact extends beyond simple code execution to include potential data exfiltration, privilege escalation, and system compromise. Attackers can leverage this vulnerability to establish persistent access, deploy additional malware, or use the compromised system as a pivot point for further network exploration and lateral movement.
The attack vector for this vulnerability aligns with ATT&CK technique T1190 which covers exploitation of remote services, and T1059 which involves command and scripting interpreter usage. Security teams should consider implementing network-based detection measures to monitor for suspicious file upload patterns and anomalous save.php request behaviors. The vulnerability's severity is heightened by the fact that it affects the core file management functionality of VvvebJs, making it a prime target for automated exploitation tools and increasing the likelihood of widespread compromise across affected installations.
Mitigation strategies should include immediate patching to version 1.7.5 or later, implementing strict file type and name validation mechanisms, and configuring web application firewalls to monitor and block suspicious upload attempts. Additional protective measures involve restricting write permissions on critical directories, implementing proper input sanitization for all user-supplied parameters, and conducting thorough security testing of file upload functionality. Organizations should also establish monitoring procedures to detect unauthorized file modifications and maintain up-to-date vulnerability assessments to identify similar weaknesses in their web applications.