CVE-2022-21669
📋 TL;DR
CVE-2022-21669 is a critical vulnerability in PuddingBot where the bot token was hardcoded in the main.py source file, publicly exposing it. This allows malicious actors to take full control of the bot, impersonate it, and potentially compromise the Discord server it manages. All users running PuddingBot version 0.0.6-b933652 or earlier are affected.
💻 Affected Systems
- PuddingBot
📦 What is this software?
Puddingbot by Puddingbot Project
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain complete control of the bot, impersonate administrators, delete channels, ban users, steal sensitive data, and use the bot for further attacks on the Discord server and its members.
Likely Case
Attackers use the exposed token to take over the bot, send malicious messages, spam users, and disrupt server operations until the token is revoked.
If Mitigated
With proper controls like environment variables and secret management, the token remains secure, preventing unauthorized access even if source code is exposed.
🎯 Exploit Status
Exploitation requires only reading the publicly exposed source code to extract the token, making it trivial for attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Versions after commit a5b15fb0a5be5fdbacba8ff7b2c8759d5e3ba20f
Vendor Advisory: https://github.com/PuddingBot/pudding-bot/security/advisories/GHSA-cxgr-xpmj-9qjm
Restart Required: Yes
Instructions:
1. Update to the latest version of PuddingBot from the official repository. 2. Revoke the old bot token in Discord Developer Portal. 3. Generate a new bot token. 4. Configure the new token using environment variables or secure storage. 5. Restart the bot service.
🔧 Temporary Workarounds
Immediate Token Revocation
allRevoke the exposed bot token in Discord Developer Portal to prevent further misuse, even before patching.
Navigate to Discord Developer Portal > Applications > Your Bot > Bot > Reset Token
Environment Variable Configuration
linuxMove the bot token from hardcoded source to an environment variable to prevent exposure.
export BOT_TOKEN='your_new_token'
Update main.py to use os.getenv('BOT_TOKEN')
🧯 If You Can't Patch
- Immediately revoke the compromised bot token in Discord Developer Portal and generate a new one.
- Isolate the bot instance from sensitive channels and permissions until it can be updated.
🔍 How to Verify
Check if Vulnerable:
Inspect the main.py file for hardcoded bot tokens. If the token is visible in plain text, the system is vulnerable.Check Version:
Check the version in the bot's configuration or repository commit history.Verify Fix Applied:
Ensure main.py no longer contains hardcoded tokens and uses environment variables or secure configuration. Verify the bot operates with the new token.📡 Detection & Monitoring
Log Indicators:
- Unauthorized bot logins
- Unexpected bot actions like message deletions or user bans
- Failed authentication attempts with old tokens
Network Indicators:
- Unusual API calls to Discord from the bot's IP
- Traffic patterns indicating token misuse
SIEM Query:
source="discord_bot_logs" AND (event="token_revoked" OR event="unauthorized_access")🔗 References
- https://github.com/PuddingBot/pudding-bot/commit/a5b15fb0a5be5fdbacba8ff7b2c8759d5e3ba20f
- https://github.com/PuddingBot/pudding-bot/security/advisories/GHSA-cxgr-xpmj-9qjm
- https://github.com/PuddingBot/pudding-bot/commit/a5b15fb0a5be5fdbacba8ff7b2c8759d5e3ba20f
- https://github.com/PuddingBot/pudding-bot/security/advisories/GHSA-cxgr-xpmj-9qjm
