Remote Code Execution in ClipBucket Video Sharing Platform

Executive Summary

This vulnerability exists in ClipBucket v5, an open source video sharing platform, specifically in its Remote Play feature prior to version 5.5.3 - #140. Authenticated users can add a video by importing an external URL as the source. However, the URL is directly concatenated into shell commands without proper escaping, allowing any shell metacharacters in the URL to be interpreted and executed. This leads to arbitrary command execution on the server.

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Impact Analysis

This vulnerability can have severe impacts because it allows an authenticated user to execute arbitrary shell commands on the server hosting ClipBucket. This can lead to full system compromise, including unauthorized access, data theft, data modification, service disruption, or further exploitation of the affected system.

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Mitigation Strategies

To mitigate this vulnerability, immediately upgrade ClipBucket to version 5.5.3 - #140 or later, where the issue has been patched.

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Compliance Impact

The vulnerability allows attackers to execute arbitrary shell commands, potentially leading to full system compromise, unauthorized data access, and modification.

Such unauthorized access and control over the system can result in breaches of confidentiality, integrity, and availability of sensitive data.

This can negatively impact compliance with common standards and regulations like GDPR and HIPAA, which require protection of personal and sensitive information against unauthorized access and data breaches.

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Detection Guidance

This vulnerability can be detected by testing the Remote Play feature of ClipBucket for command injection via the video URL parameter. Since the issue involves shell command injection through unsanitized URLs, you can attempt to inject shell metacharacters in the URL parameter and observe if arbitrary commands are executed.

One approach is to use crafted URLs containing shell metacharacters such as `;`, `&&`, or backticks to see if the system executes injected commands. For example, you can try importing a video URL with a payload like `http://example.com/video.mp4;id` or `http://example.com/video.mp4 && whoami`.

On the server, monitoring for unexpected shell command executions or unusual process activity related to the ClipBucket application may help detect exploitation attempts.

Specific commands to test or detect the vulnerability are not provided in the available resources.

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