CVE-2021-32454
📋 TL;DR
CVE-2021-32454 is a critical vulnerability in SITEL CAP/PRX firmware where hardcoded credentials allow attackers to take over devices. Attackers with access to the device can change administrative credentials, locking out legitimate administrators. This affects all organizations using SITEL CAP/PRX firmware version 5.2.01.
💻 Affected Systems
- SITEL CAP/PRX
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete device takeover leading to denial of service, configuration manipulation, and potential lateral movement within industrial control networks.
Likely Case
Unauthorized administrative access allowing attackers to modify device settings, disrupt operations, or use the device as an entry point.
If Mitigated
Limited impact if devices are properly segmented and access controls prevent unauthorized network access to management interfaces.
🎯 Exploit Status
Exploitation requires network access to the device's management interface but no authentication or special tools.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check with vendor for updated firmware
Vendor Advisory: https://www.incibe-cert.es/en/early-warning/ics-advisories/sitel-capprx-hardcoded-credentials
Restart Required: Yes
Instructions:
1. Contact SITEL for updated firmware. 2. Backup device configuration. 3. Apply firmware update following vendor instructions. 4. Verify new credentials are not hardcoded. 5. Change all administrative passwords.
🔧 Temporary Workarounds
Network Segmentation
allIsolate SITEL devices from untrusted networks and restrict access to management interfaces.
Access Control Lists
allImplement strict firewall rules to limit which IP addresses can access the device management interface.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate vulnerable devices
- Monitor for unauthorized access attempts to management interfaces
🔍 How to Verify
Check if Vulnerable:
Check device firmware version via web interface or CLI. If version is 5.2.01, device is vulnerable.Check Version:
Check via device web interface or consult vendor documentation for CLI commandVerify Fix Applied:
Verify firmware version has been updated beyond 5.2.01 and test that default credentials no longer work.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful logins
- Configuration changes from unexpected sources
Network Indicators:
- Unauthorized access to device management ports (typically 80/443)
- Traffic patterns indicating credential brute forcing
SIEM Query:
source_ip="device_ip" AND (event_type="authentication" OR event_type="configuration_change")