CVE-2023-2158
📋 TL;DR
CVE-2023-2158 is a user impersonation vulnerability in Code Dx where attackers can forge 'Remember Me' tokens using a hard-coded cipher to access other users' accounts. This affects Code Dx versions before 2023.4.2, allowing unauthorized access to user sessions and data.
💻 Affected Systems
- Synopsys Code Dx
📦 What is this software?
Code Dx by Synopsys
⚠️ Risk & Real-World Impact
Worst Case
Complete account takeover of any user, including administrators, leading to data theft, privilege escalation, and potential system compromise.
Likely Case
Unauthorized access to user accounts for data exfiltration, privilege escalation, or lateral movement within the application.
If Mitigated
Limited impact if proper network segmentation and monitoring are in place, but still represents authentication bypass.
🎯 Exploit Status
Exploitation requires knowledge of target usernames and ability to craft tokens using the hard-coded cipher.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 2023.4.2
Vendor Advisory: https://community.synopsys.com/s/question/0D5Hr00006VdZblKAF/announcement-changelog-code-dx-202342
Restart Required: Yes
Instructions:
1. Download Code Dx version 2023.4.2 or later from official sources. 2. Follow the upgrade instructions in the Code Dx documentation. 3. Restart the Code Dx service after upgrade.
🔧 Temporary Workarounds
Disable Remember Me Feature
allTemporarily disable the 'Remember Me' functionality to prevent token-based authentication
Modify Code Dx configuration to disable persistent login tokens
🧯 If You Can't Patch
- Implement network segmentation to restrict access to Code Dx instances
- Enable detailed authentication logging and monitor for suspicious login patterns
🔍 How to Verify
Check if Vulnerable:
Check Code Dx version via web interface or configuration files - versions below 2023.4.2 are vulnerableCheck Version:
Check Code Dx web interface or consult deployment documentation for version informationVerify Fix Applied:
Verify installation of version 2023.4.2 or later and confirm 'Remember Me' tokens are properly encrypted📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful login with 'Remember Me' token
- Login from unusual IP addresses using persistent tokens
Network Indicators:
- Unusual authentication patterns to Code Dx endpoints
SIEM Query:
source="code-dx-logs" AND (event_type="authentication" AND (token_use="remember_me" OR suspicious_ip=true))