CVE-2022-1033 in crater-invoice
Summary
by MITRE • 03/23/2022
Unrestricted Upload of File with Dangerous Type in GitHub repository crater-invoice/crater prior to 6.0.6.
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Analysis
by VulDB Data Team • 03/25/2022
The vulnerability identified as CVE-2022-1033 represents a critical security flaw in the crater-invoice/crater repository that affects versions prior to 6.0.6. This issue manifests as an unrestricted file upload vulnerability that permits the uploading of files with dangerous types, creating a significant attack surface for malicious actors. The vulnerability stems from inadequate validation and sanitization of file uploads within the application's file handling mechanisms, allowing unauthorized users to bypass security controls and potentially execute arbitrary code on the affected system.
This vulnerability falls under the category of unrestricted file upload as defined by CWE-434, which occurs when applications allow users to upload files without proper validation of file types, content, or destination. The flaw enables attackers to upload malicious files such as web shells, executable binaries, or scripts that can be executed within the application's context. The impact is particularly severe because the application processes these files without sufficient restrictions, potentially allowing remote code execution, privilege escalation, or complete system compromise. The vulnerability exists in the repository's file upload functionality where input validation is insufficient to prevent the upload of dangerous file types that could be used to exploit the system.
The operational impact of CVE-2022-1033 extends beyond simple data theft or service disruption, as it provides attackers with potential persistence mechanisms and lateral movement capabilities within the compromised environment. Attackers could upload web shells or other malicious payloads that would remain undetected while providing them with ongoing access to the system. This vulnerability aligns with several tactics from the MITRE ATT&CK framework including T1190 for Exploit Public-Facing Application and T1059 for Command and Scripting Interpreter, as the compromised system could be used to execute commands and maintain access. The vulnerability also maps to T1505.003 for Server Software Component, indicating that the compromised application serves as a vector for further attacks.
The technical implementation of this vulnerability suggests that the application lacks proper file type validation, content inspection, and secure storage mechanisms for uploaded files. The absence of checks on file extensions, MIME types, and file content creates opportunities for attackers to upload malicious files disguised as legitimate documents. Additionally, the vulnerability may not properly isolate uploaded files from the application's execution environment, allowing uploaded content to be executed directly. Organizations should implement comprehensive mitigations including strict file type validation, content inspection, proper file naming conventions, and secure storage practices. The recommended approach involves implementing whitelisting of allowed file types, performing thorough content analysis, and ensuring uploaded files are stored in non-executable directories with proper access controls. Regular security updates and vulnerability assessments should be conducted to prevent similar issues in future releases, with the specific fix in version 6.0.6 addressing these fundamental security gaps in the file upload handling process.