CVE-2023-40464
📋 TL;DR
This vulnerability in Sierra Wireless ALEOS uses a hardcoded SSL certificate and private key across multiple devices. Attackers who obtain these credentials can perform man-in-the-middle attacks between ACEManager clients and servers, potentially intercepting and manipulating management traffic. Organizations using affected ALEOS versions for device management are at risk.
💻 Affected Systems
- Sierra Wireless ALEOS
📦 What is this software?
Aleos by Sierrawireless
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of device management communications, allowing attackers to intercept credentials, push malicious configurations, or disrupt operations of Sierra Wireless devices.
Likely Case
Interception of management traffic leading to credential theft, configuration manipulation, or denial of service for affected devices.
If Mitigated
Limited impact if network segmentation prevents access to management interfaces or if alternative secure management methods are used.
🎯 Exploit Status
Exploitation requires obtaining the hardcoded certificate/key pair and network positioning to intercept traffic. No authentication bypass needed once credentials are obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ALEOS 4.16.1 and later
Vendor Advisory: https://source.sierrawireless.com/resources/security-bulletins/sierra-wireless-technical-bulletin---swi-psa-2023-006/
Restart Required: Yes
Instructions:
1. Download ALEOS 4.16.1 or later from Sierra Wireless support portal. 2. Backup current configuration. 3. Apply firmware update via ACEManager or local interface. 4. Reboot device. 5. Verify new certificate is generated and in use.
🔧 Temporary Workarounds
Disable ACEManager
allTemporarily disable ACEManager service if not required for operations
# Via device CLI or web interface, disable ACEManager service
Network Segmentation
allIsolate ACEManager traffic to trusted management networks only
# Configure firewall rules to restrict ACEManager traffic to specific source IPs
🧯 If You Can't Patch
- Implement strict network segmentation to isolate ACEManager traffic from untrusted networks
- Monitor for unusual certificate usage or unexpected SSL/TLS handshakes on ACEManager ports
🔍 How to Verify
Check if Vulnerable:
Check ALEOS version via device web interface or CLI. If version is 4.16.0 or earlier, device is vulnerable.Check Version:
# Via SSH or console: show version | include ALEOSVerify Fix Applied:
After patching, verify ALEOS version is 4.16.1 or later and check that SSL certificates are unique per device (not hardcoded).📡 Detection & Monitoring
Log Indicators:
- Multiple SSL/TLS handshake failures
- Certificate validation errors in ACEManager logs
- Unexpected certificate fingerprints
Network Indicators:
- SSL/TLS traffic to ACEManager ports (default 443) with unexpected certificates
- Man-in-the-middle attack patterns on management interfaces
SIEM Query:
source="*acemanager*" AND (certificate_error OR ssl_handshake_failure)