CVE-2024-43114
📋 TL;DR
This vulnerability in JetBrains TeamCity allows attackers to escalate privileges due to incorrect directory permissions. It affects all TeamCity installations before version 2024.07.1. Attackers could potentially gain unauthorized access to sensitive system resources.
💻 Affected Systems
- JetBrains TeamCity
📦 What is this software?
Teamcity by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Full system compromise where attackers gain administrative control over the TeamCity server, potentially accessing build secrets, source code, and deploying malicious artifacts.
Likely Case
Unauthorized access to sensitive configuration files, build artifacts, or credentials stored in TeamCity directories, leading to data exposure or further lateral movement.
If Mitigated
Limited impact with proper network segmentation and access controls, though directory permission issues could still expose some configuration data.
🎯 Exploit Status
Exploitation requires some level of access to the TeamCity instance. The vulnerability involves directory permission manipulation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.07.1
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup your TeamCity configuration and data. 2. Download TeamCity 2024.07.1 from the official JetBrains website. 3. Stop the TeamCity service. 4. Install the new version following JetBrains upgrade documentation. 5. Restart the TeamCity service. 6. Verify the upgrade was successful.
🔧 Temporary Workarounds
Manual Directory Permission Fix
linuxManually adjust directory permissions to restrict unauthorized access while waiting for patch deployment.
chmod 750 /opt/teamcity/data
chmod 750 /opt/teamcity/logs
chown -R teamcity:teamcity /opt/teamcity
🧯 If You Can't Patch
- Implement strict network access controls to limit TeamCity server exposure
- Enable detailed audit logging for all directory access attempts and monitor for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check TeamCity version via web interface or server logs. If version is below 2024.07.1, the system is vulnerable.Check Version:
Check TeamCity web interface or view server startup logs for version information.Verify Fix Applied:
Verify TeamCity version is 2024.07.1 or higher and check directory permissions are properly set.📡 Detection & Monitoring
Log Indicators:
- Unauthorized directory access attempts
- Permission denied errors in system logs
- Unusual file access patterns in TeamCity directories
Network Indicators:
- Unusual outbound connections from TeamCity server
- Suspicious authentication attempts
SIEM Query:
source="teamcity.logs" AND (event="permission_denied" OR event="unauthorized_access")