CVE-2021-29502
📋 TL;DR
CVE-2021-29502 is an injection vulnerability in the WarnSystem plugin for Red Discord bot that allows any user to access sensitive information by crafting malicious templates. The vulnerability affects all users of WarnSystem versions before 1.3.18. Attackers can exploit improper input sanitization to extract confidential data from the bot's configuration.
💻 Affected Systems
- WarnSystem cog for Red Discord bot
📦 What is this software?
Warnsystem by Warnsystem Project
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of sensitive bot configuration data including API keys, tokens, and user information leading to account takeover or further attacks
Likely Case
Unauthorized access to sensitive configuration details and user data stored in the WarnSystem plugin
If Mitigated
No data exposure with proper patching or workaround implementation
🎯 Exploit Status
Exploitation requires Discord user access but no authentication to the bot itself
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.3.18
Vendor Advisory: https://github.com/retke/Laggrons-Dumb-Cogs/security/advisories/GHSA-834g-67vv-m9wq
Restart Required: Yes
Instructions:
1. Update WarnSystem cog to version 1.3.18 or higher using Red's package manager. 2. Restart the Red bot. 3. Verify update with !warnsysteminfo command.
🔧 Temporary Workarounds
Disable vulnerable command
allGlobally disable the !warnset description command that contains the vulnerability
[p]command disable global !warnset description
Unload WarnSystem cog
allCompletely unload the vulnerable plugin from the bot
[p]unload warns
🧯 If You Can't Patch
- Implement strict role-based access control to limit who can use WarnSystem commands
- Monitor bot logs for unusual template usage patterns or data extraction attempts
🔍 How to Verify
Check if Vulnerable:
Check if WarnSystem version is below 1.3.18 using !warnsysteminfo commandCheck Version:
!warnsysteminfoVerify Fix Applied:
Run !warnsysteminfo and confirm version is 1.3.18 or higher📡 Detection & Monitoring
Log Indicators:
- Unusual template patterns in WarnSystem logs
- Multiple failed or unusual !warnset description commands
Network Indicators:
- Unusual data extraction patterns from bot responses
SIEM Query:
Search for '!warnset description' commands with unusual template patterns containing injection characters🔗 References
- https://github.com/retke/Laggrons-Dumb-Cogs/commit/c79dd2cc879989cf2018e76ba2aad0baef3b4ec8
- https://github.com/retke/Laggrons-Dumb-Cogs/security/advisories/GHSA-834g-67vv-m9wq
- https://github.com/retke/Laggrons-Dumb-Cogs/commit/c79dd2cc879989cf2018e76ba2aad0baef3b4ec8
- https://github.com/retke/Laggrons-Dumb-Cogs/security/advisories/GHSA-834g-67vv-m9wq
