CVE-2021-34609
📋 TL;DR
This CVE describes a remote SQL injection vulnerability in Aruba ClearPass Policy Manager that allows attackers to execute arbitrary SQL commands on the database. Affected organizations are those running ClearPass Policy Manager versions prior to 6.10.0, 6.9.6, and 6.8.9. Successful exploitation could lead to data theft, authentication bypass, or complete system compromise.
💻 Affected Systems
- Aruba ClearPass Policy Manager
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of the ClearPass system leading to credential theft, network access control bypass, privilege escalation, and lateral movement across the network infrastructure.
Likely Case
Unauthorized access to sensitive user data, authentication databases, and network policy configurations stored in the ClearPass database.
If Mitigated
Limited impact due to network segmentation, proper input validation at other layers, and database permissions restricting damage scope.
🎯 Exploit Status
SQL injection vulnerabilities typically have low exploitation complexity. The advisory indicates remote exploitation is possible, suggesting unauthenticated access to vulnerable endpoints.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 6.10.0, 6.9.6, or 6.8.9
Vendor Advisory: https://www.arubanetworks.com/assets/alert/ARUBA-PSA-2021-012.txt
Restart Required: Yes
Instructions:
1. Backup current ClearPass configuration and database. 2. Download appropriate patch version from Aruba support portal. 3. Apply update through ClearPass web interface or CLI. 4. Restart ClearPass services as required. 5. Verify successful update and functionality.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to ClearPass management interfaces to authorized administrative networks only
Web Application Firewall
allDeploy WAF with SQL injection protection rules in front of ClearPass
🧯 If You Can't Patch
- Implement strict network access controls to limit ClearPass exposure
- Enable comprehensive logging and monitoring for SQL injection attempts
🔍 How to Verify
Check if Vulnerable:
Check ClearPass version via web interface (Admin > Support > About) or CLI command 'show version'Check Version:
show versionVerify Fix Applied:
Verify version is 6.10.0, 6.9.6, or 6.8.9 or later. Test SQL injection payloads against known vulnerable endpoints.📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in database logs
- Multiple failed authentication attempts followed by SQL syntax in web logs
- Unexpected database schema changes
Network Indicators:
- SQL injection payloads in HTTP requests to ClearPass endpoints
- Unusual database connection patterns from ClearPass server
SIEM Query:
source="clearpass" AND ("sql" OR "union" OR "select" OR "insert" OR "delete" OR "update" OR "--" OR "' OR '1'='1")