Authenticated User Video Subtitle Manipulation in ClipBucket

Executive Summary

This vulnerability exists in ClipBucket version 5 before 5.5.3. It allows a normal authenticated user to edit subtitles of videos that belong to other users due to a lack of proper authorization checks. Specifically, an attacker can upload subtitles, change their names, or delete subtitles of other users' videos.

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Impact Analysis

The vulnerability can lead to unauthorized modification or deletion of video subtitles by any authenticated user. This can result in misinformation, loss of important subtitle data, or disruption of the video content experience for users relying on subtitles.

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Mitigation Strategies

To mitigate this vulnerability, you should upgrade ClipBucket to version 5.5.3 - #133 or later, where the authorization issue allowing normal authenticated users to edit other users' video subtitles has been patched.

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Compliance Impact

The vulnerability allows authenticated users to edit, rename, or delete subtitles on videos they do not own due to insufficient authorization checks. This can lead to unauthorized modification of content, impacting data integrity.

While the CVE description and resources do not explicitly mention compliance with standards such as GDPR or HIPAA, the unauthorized modification of data could potentially violate principles of data integrity and access control required by these regulations.

However, there is no direct information provided about specific impacts on compliance with GDPR, HIPAA, or other common standards.

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Detection Guidance

This vulnerability can be detected by monitoring for unauthorized POST requests that attempt to edit, rename, or delete subtitles on videos not owned by the authenticated user.

Specifically, an attacker exploits the lack of ownership verification by sending POST requests to the subtitle editing endpoints with parameters targeting videos they do not own.

To detect such activity, you can use network monitoring tools or web server logs to identify suspicious POST requests to subtitle-related URLs from authenticated users.

• Use tools like tcpdump or Wireshark to capture HTTP POST traffic to the ClipBucket subtitle editing endpoints.
• Example command to capture HTTP POST requests on port 80 or 443: tcpdump -A -s 0 'tcp port 80 and (((ip[2:2] - ((ip[0]&0xf)<<2)) - ((tcp[12]&0xf0)>>2)) != 0)'
• Analyze web server access logs for POST requests to subtitle editing URLs with parameters indicating subtitle modification.
• Check for POST requests from authenticated users modifying subtitles on videos they do not own, which indicates exploitation attempts.

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