CVE-2024-36470
📋 TL;DR
This CVE describes an authentication bypass vulnerability in JetBrains TeamCity CI/CD servers. Attackers could potentially gain unauthorized access to TeamCity instances in specific edge cases. Organizations running vulnerable TeamCity versions are affected.
💻 Affected Systems
- JetBrains TeamCity
📦 What is this software?
Teamcity by Jetbrains
Teamcity by Jetbrains
Teamcity by Jetbrains
Teamcity by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the TeamCity server allowing attackers to execute arbitrary code, steal source code, modify build pipelines, and deploy malicious artifacts to production environments.
Likely Case
Unauthorized access to TeamCity projects and build configurations, potentially leading to source code exfiltration or injection of malicious code into build processes.
If Mitigated
Limited impact if proper network segmentation, authentication controls, and monitoring are in place, though authentication bypass still represents a significant security risk.
🎯 Exploit Status
Exploitation requires specific edge case conditions to be met. No public exploit code has been identified at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2022.04.7, 2022.10.6, 2023.05.6, 2023.11.5 or later
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup TeamCity configuration and data. 2. Download appropriate patched version from JetBrains website. 3. Stop TeamCity service. 4. Install the update following JetBrains upgrade documentation. 5. Restart TeamCity service. 6. Verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
allRestrict network access to TeamCity instances to trusted IP addresses only
Enhanced Authentication
allImplement additional authentication layers such as VPN or reverse proxy with authentication
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit TeamCity access
- Enable comprehensive logging and monitoring for authentication anomalies
🔍 How to Verify
Check if Vulnerable:
Check TeamCity version in Administration → Server Administration → Server Health → VersionCheck Version:
Check TeamCity web interface or examine teamcity-server.log for version informationVerify Fix Applied:
Verify version is 2022.04.7, 2022.10.6, 2023.05.6, 2023.11.5 or later📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful access
- Unusual authentication patterns
- Access from unexpected IP addresses
Network Indicators:
- Unusual API calls to TeamCity endpoints
- Authentication bypass attempts
SIEM Query:
source="teamcity" AND (event_type="authentication" OR event_type="access") AND result="success" AND user="unknown"