CVE-2024-21521
📋 TL;DR
The @discordjs/opus package is vulnerable to Denial of Service (DoS) attacks where an attacker can crash the system by providing specially crafted input objects with toString properties to certain functions. This affects all applications using any version of @discordjs/opus for audio processing, particularly Discord bots and voice applications.
💻 Affected Systems
- @discordjs/opus
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete service disruption where the Node.js process crashes, causing downtime for any application using the vulnerable package.
Likely Case
Application instability and crashes when processing malicious audio input, leading to service interruptions.
If Mitigated
Minimal impact if proper input validation and error handling are implemented alongside the patch.
🎯 Exploit Status
Proof of concept code is publicly available in the GitHub gist reference. Exploitation requires sending malicious input to functions that process audio data.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check for updates to @discordjs/opus package
Vendor Advisory: https://github.com/discordjs/opus/security/advisories
Restart Required: Yes
Instructions:
1. Update package.json to use latest @discordjs/opus version. 2. Run 'npm update @discordjs/opus' or 'yarn upgrade @discordjs/opus'. 3. Restart your application.
🔧 Temporary Workarounds
Input validation wrapper
allImplement input validation to reject objects with toString properties before passing to @discordjs/opus functions
Process isolation
allRun audio processing in separate worker processes to contain crashes
🧯 If You Can't Patch
- Implement strict input validation and sanitization for all audio input
- Use process monitoring and automatic restart mechanisms to minimize downtime
🔍 How to Verify
Check if Vulnerable:
Check package.json or run 'npm list @discordjs/opus' to see if any version is installedCheck Version:
npm list @discordjs/opus | grep @discordjs/opusVerify Fix Applied:
Verify the installed version is updated by checking package.json or running 'npm list @discordjs/opus'📡 Detection & Monitoring
Log Indicators:
- Node.js process crashes
- Unhandled exceptions in audio processing
- Segmentation faults in opus-related code
Network Indicators:
- Unusual audio input patterns
- Repeated connection attempts to audio endpoints
SIEM Query:
process.name:node AND (event.type:crash OR error.message:*opus* OR error.message:*toString*)🔗 References
- https://gist.github.com/dellalibera/98c48fd74bb240adbd7841a5c02aba9e
- https://github.com/discordjs/opus/blob/814e500c2785c5207ace19650192629beba2728b/src/node-opus.cc%23L47
- https://security.snyk.io/vuln/SNYK-JS-DISCORDJSOPUS-6370643
- https://gist.github.com/dellalibera/98c48fd74bb240adbd7841a5c02aba9e
- https://github.com/discordjs/opus/blob/814e500c2785c5207ace19650192629beba2728b/src/node-opus.cc%23L47
- https://security.snyk.io/vuln/SNYK-JS-DISCORDJSOPUS-6370643
