CVE-2024-54156
📋 TL;DR
This CVE describes a prototype pollution vulnerability in JetBrains YouTrack issue tracking software. Attackers can manipulate JavaScript object prototypes to modify application behavior, potentially leading to denial of service or other security impacts. Organizations running YouTrack instances are affected.
💻 Affected Systems
- JetBrains YouTrack
📦 What is this software?
Youtrack by Jetbrains
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise through chained attacks, data manipulation, or remote code execution if combined with other vulnerabilities
Likely Case
Application instability, denial of service, or limited data manipulation within the YouTrack application
If Mitigated
Minimal impact with proper input validation and security controls in place
🎯 Exploit Status
Prototype pollution typically requires authenticated access and specific knowledge of the application
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2024.3.52635
Vendor Advisory: https://www.jetbrains.com/privacy-security/issues-fixed/
Restart Required: Yes
Instructions:
1. Backup your YouTrack instance. 2. Download YouTrack version 2024.3.52635 or later from JetBrains. 3. Follow JetBrains upgrade documentation for your deployment method. 4. Restart the YouTrack service.
🔧 Temporary Workarounds
Input Validation Enhancement
allImplement additional input validation for merge functions to reject suspicious payloads
Requires custom code modifications to YouTrack
🧯 If You Can't Patch
- Implement strict network segmentation to isolate YouTrack from critical systems
- Enable enhanced logging and monitoring for suspicious merge function activity
🔍 How to Verify
Check if Vulnerable:
Check YouTrack version in Administration → System → About. If version is below 2024.3.52635, you are vulnerable.Check Version:
Check web interface at /about or examine deployment configuration filesVerify Fix Applied:
Verify version shows 2024.3.52635 or higher in Administration → System → About📡 Detection & Monitoring
Log Indicators:
- Unusual merge function calls
- JavaScript errors related to object manipulation
- Unexpected prototype modifications
Network Indicators:
- Abnormal API calls to merge endpoints
- Suspicious payloads in HTTP requests
SIEM Query:
source="youtrack" AND ("merge" OR "prototype") AND status=error