CVE-2024-56353
📋 TL;DR
JetBrains TeamCity backup files exposed user credentials and session cookies in versions before 2024.12. This vulnerability allows attackers with access to backup files to steal authentication data. Organizations using vulnerable TeamCity versions are affected.
💻 Affected Systems
- JetBrains TeamCity
📦 What is this software?
Teamcity by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain administrative access to TeamCity instances, potentially compromising CI/CD pipelines and source code repositories.
Likely Case
Credential theft leading to unauthorized access to TeamCity systems and potential lateral movement within the network.
If Mitigated
Limited impact if backup files are properly secured with access controls and encryption.
🎯 Exploit Status
Exploitation requires access to backup files, which typically requires some level of system access.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.12
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Download TeamCity 2024.12 or later from JetBrains website. 2. Backup current configuration. 3. Stop TeamCity service. 4. Install new version. 5. Start TeamCity service. 6. Verify functionality.
🔧 Temporary Workarounds
Secure Backup Files
linuxApply strict access controls and encryption to TeamCity backup files
chmod 600 /path/to/backup/*
chown teamcity:teamcity /path/to/backup/*
Disable Unnecessary Backups
allTemporarily disable automated backups until patching
Edit TeamCity configuration to remove backup schedules
🧯 If You Can't Patch
- Implement strict access controls on backup directories (minimum permissions, separate storage)
- Enable encryption for all backup files and monitor backup access logs
🔍 How to Verify
Check if Vulnerable:
Check TeamCity version in Administration → Server Administration → Global SettingsCheck Version:
Check TeamCity web interface or server logs for version informationVerify Fix Applied:
Confirm version is 2024.12 or later and test backup functionality📡 Detection & Monitoring
Log Indicators:
- Unauthorized access to backup files
- Failed authentication attempts followed by successful logins
Network Indicators:
- Unusual access patterns to backup storage locations
SIEM Query:
source="teamcity" AND (event="backup_access" OR event="authentication_failure")