CVE-2022-29353 in Graphql-upload
Summary
by MITRE • 05/16/2022
An arbitrary file upload vulnerability in the file upload module of Graphql-upload v13.0.0 allows attackers to execute arbitrary code via a crafted filename.
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Analysis
by VulDB Data Team • 05/18/2022
The CVE-2022-29353 vulnerability represents a critical arbitrary file upload flaw in the graphql-upload library version 13.0.0, which operates within graphql-based web applications and APIs. This vulnerability stems from inadequate input validation and sanitization mechanisms within the file upload processing module, creating a pathway for malicious actors to bypass security controls and upload potentially harmful files to the target system. The flaw specifically manifests when the application accepts file uploads through graphql endpoints without proper restrictions on file types, extensions, or content validation, allowing attackers to manipulate the upload process through crafted filenames that may contain malicious payloads or scripts.
The technical exploitation of this vulnerability occurs when an attacker crafts a malicious filename that, upon upload, gets processed by the vulnerable graphql-upload module. The flaw typically involves the absence of proper file extension validation, directory traversal checks, or content type verification that would normally prevent the upload of executable files or scripts. When the system processes the crafted filename, it may store the file in a web-accessible directory or execute it in a context that allows code execution. This vulnerability falls under the CWE-434 category of Unrestricted Upload of File with Dangerous Type, which is classified as a high-risk vulnerability due to its potential for remote code execution. The attack vector is particularly dangerous because it leverages the graphql protocol's flexibility in handling file uploads, making it difficult to detect and prevent through conventional security measures.
The operational impact of CVE-2022-29353 extends beyond simple data compromise, as successful exploitation can lead to complete system compromise and persistent backdoor access. Attackers can upload web shells, malicious scripts, or other executable payloads that allow them to execute arbitrary commands on the affected server, potentially leading to data exfiltration, service disruption, or further lateral movement within the network. The vulnerability affects any system running graphql-upload version 13.0.0, including web applications, content management systems, and API gateways that utilize this library for file handling. The risk is amplified when the application runs with elevated privileges or when the uploaded files are processed in contexts that allow execution of code, such as when files are stored in directories that are directly served by web servers.
Mitigation strategies for this vulnerability should focus on immediate patching of the graphql-upload library to versions that address the file upload validation issues. Organizations must implement comprehensive file validation mechanisms including strict extension filtering, content type verification, and mandatory file format checks that prevent the upload of executable or potentially dangerous file types. The implementation of proper input sanitization and output encoding practices should be enforced throughout the application's file handling processes, aligning with the principle of least privilege and ensuring that uploaded files are stored in non-executable directories. Security controls should include web application firewalls that can detect and block suspicious upload patterns, as well as regular security scanning and penetration testing to identify potential exploitation vectors. According to the ATT&CK framework, this vulnerability maps to the T1059.001 technique for Command and Scripting Interpreter, and the T1566.001 technique for Phishing, as exploitation typically involves crafting malicious payloads that bypass security controls. Additionally, implementing proper logging and monitoring of file upload activities can help detect potential exploitation attempts and provide forensic evidence for incident response activities.