CVE-2020-29594
📋 TL;DR
This vulnerability in Rocket.Chat allows attackers to bypass SAML authentication and gain unauthorized access to user accounts. It affects Rocket.Chat instances with SAML login enabled across multiple version ranges. The high CVSS score indicates critical severity with potential for complete system compromise.
💻 Affected Systems
- Rocket.Chat
📦 What is this software?
Rocket.chat by Rocket.chat
Rocket.chat by Rocket.chat
Rocket.chat by Rocket.chat
Rocket.chat by Rocket.chat
Rocket.chat by Rocket.chat
Rocket.chat by Rocket.chat
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover, administrative access to Rocket.Chat instance, potential lateral movement to connected systems, and data exfiltration.
Likely Case
Unauthorized access to user accounts, privilege escalation, and potential data theft from the Rocket.Chat platform.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring in place.
🎯 Exploit Status
The vulnerability involves SAML login mishandling, suggesting authentication bypass. No public exploit code was found in the provided references.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 0.74.4, 1.3.4, 2.4.13, 3.7.3, 3.8.3, or 3.9.1 depending on your version track
Vendor Advisory: https://github.com/RocketChat/Rocket.Chat/releases/tag/3.9.1
Restart Required: Yes
Instructions:
1. Identify your current Rocket.Chat version. 2. Upgrade to the patched version for your track (0.74.4, 1.3.4, 2.4.13, 3.7.3, 3.8.3, or 3.9.1). 3. Restart the Rocket.Chat service. 4. Verify the upgrade was successful.
🔧 Temporary Workarounds
Disable SAML Authentication
allTemporarily disable SAML login until patching is complete
Edit Rocket.Chat configuration to disable SAML authentication
🧯 If You Can't Patch
- Implement network segmentation to isolate Rocket.Chat from critical systems
- Enable enhanced logging and monitoring for authentication events
🔍 How to Verify
Check if Vulnerable:
Check Rocket.Chat version and verify SAML is enabled. If version is in affected range and SAML is enabled, system is vulnerable.Check Version:
Check Rocket.Chat admin panel or run appropriate command for your deployment methodVerify Fix Applied:
Verify Rocket.Chat version is patched (0.74.4, 1.3.4, 2.4.13, 3.7.3, 3.8.3, or 3.9.1) and test SAML authentication functionality.📡 Detection & Monitoring
Log Indicators:
- Unusual authentication patterns
- Failed SAML login attempts followed by successful logins from unexpected sources
- Multiple login attempts from single IP
Network Indicators:
- Unusual traffic patterns to SAML endpoints
- Authentication requests from unexpected sources
SIEM Query:
Example: 'source="rocketchat" AND (event="authentication" OR event="login") AND result="success" AND user_agent NOT IN expected_list'