Fix Arbitrary File Upload Vulnerability (CWE-434) Leading to Potential RCE

Vulnerability Overview Vulnerability ID: #1209 Vulnerability Title: Fix media sounds upload validation Vulnerability Description: The endpoint accepts any file without validation for extension, content, or size, allowing unauthenticated clients to write arbitrary files (e.g., shell scripts) to . This vulnerability is classified as CWE-434 with a medium severity rating. Impact Scope Affected Endpoint: Attacker: Unauthenticated clients Potential Risk: Writing arbitrary files, which may lead to Remote Code Execution (RCE) Remediation Extension Whitelist: Only allows , , , , , , , extensions. File Size Limit: Limits size to 25 MiB; streams to a temporary file and reads the entire body in chunks into memory. Content Validation: Validates via GStreamer's finder, requiring at least one audio stream and rejecting non-audio payloads. Post-Validation Handling: Validates files are moved atomically to the final location; partial/invalid uploads are cleaned up. Testing New Tests: Added to verify: - Rejection of disallowed extensions - Rejection of oversized uploads - Stripping of path traversal attempts - Storage of valid audio files - Rejection of scripts disguised as files POC Code POC Code: No specific POC code provided, but it describes an attacker's ability to upload arbitrary files to the directory. Additional Information Merge Status: Merged into branch Merge Date: June 15, 2023 Contributor: FabienDanieu Reviewer: pierre-rouanet Summary This vulnerability allows unauthenticated clients to upload arbitrary files to the server, posing a significant security risk. The remediation effectively prevents such attacks through extension whitelisting, file size limitations, and content validation.

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Fix Arbitrary File Upload Vulnerability (CWE-434) Leading to Potential RCE

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