CVE-2020-26515
📋 TL;DR
CVE-2020-26515 is an authentication bypass vulnerability in Intland codeBeamer ALM where the 'remember-me' cookie uses NULL encryption, allowing attackers to decrypt and forge authentication tokens. This affects all users of codeBeamer ALM 10.x through 10.1.SP4 who use the remember-me feature. Attackers can gain unauthorized access to user accounts without valid credentials.
💻 Affected Systems
- Intland codeBeamer ALM
📦 What is this software?
Codebeamer by Intland
Codebeamer by Intland
Codebeamer by Intland
Codebeamer by Intland
Codebeamer by Intland
Codebeamer by Intland
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of all user accounts with remember-me cookies enabled, leading to data theft, privilege escalation, and full system compromise.
Likely Case
Unauthorized access to user accounts, session hijacking, and potential data exfiltration from compromised accounts.
If Mitigated
Limited impact if remember-me feature is disabled or proper network segmentation prevents external access.
🎯 Exploit Status
Detailed technical analysis and proof-of-concept available in the Compass Security advisory. Exploitation requires intercepting or obtaining CB_LOGIN cookies.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 10.1.SP5 and later
Vendor Advisory: https://intland.com/codebeamer/application-lifecycle-management/
Restart Required: Yes
Instructions:
1. Download codeBeamer ALM version 10.1.SP5 or later from Intland. 2. Backup current installation and data. 3. Apply the update following vendor instructions. 4. Restart the application server. 5. Verify the fix by checking version and testing authentication.
🔧 Temporary Workarounds
Disable Remember-Me Feature
allDisable the remember-me cookie functionality to prevent exploitation.
Modify application configuration to disable 'remember me' feature. Consult codeBeamer documentation for specific configuration changes.
Network Segmentation
allRestrict access to codeBeamer instances to trusted networks only.
Configure firewall rules to allow only authorized IP addresses to access codeBeamer ports (typically 8080, 8443).
🧯 If You Can't Patch
- Disable the remember-me feature immediately in all user accounts and application settings.
- Implement strict network access controls and monitor for unauthorized authentication attempts.
🔍 How to Verify
Check if Vulnerable:
Check if running codeBeamer ALM version 10.x through 10.1.SP4. Examine application logs for remember-me cookie usage patterns.Check Version:
Check codeBeamer web interface admin panel or application server logs for version information.Verify Fix Applied:
Verify version is 10.1.SP5 or later. Test that remember-me cookies now use proper encryption by examining cookie values.📡 Detection & Monitoring
Log Indicators:
- Multiple failed login attempts followed by successful authentication with remember-me cookie
- Unusual user account access from unexpected locations or IP addresses
Network Indicators:
- Unencrypted or predictable CB_LOGIN cookie values in HTTP traffic
- Authentication requests with manipulated cookie values
SIEM Query:
source="codebeamer" AND (event_type="authentication" AND cookie="CB_LOGIN") AND result="success" | stats count by src_ip, user🔗 References
- https://intland.com/codebeamer/application-lifecycle-management/
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-09_CSNC-2020-010-codebeamer_ALM_Insecure-RememberMe.txt
- https://intland.com/codebeamer/application-lifecycle-management/
- https://www.compass-security.com/fileadmin/Research/Advisories/2021-09_CSNC-2020-010-codebeamer_ALM_Insecure-RememberMe.txt
