CVE-2019-16102
📋 TL;DR
Silver Peak EdgeConnect SD-WAN devices before version 8.1.7.x have SNMP services configured with public community strings, allowing unauthorized access to SNMP data and potentially device control. This affects organizations using vulnerable EdgeConnect SD-WAN appliances for network management.
💻 Affected Systems
- Silver Peak EdgeConnect SD-WAN
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full administrative control of SD-WAN devices, enabling network traffic interception, configuration changes, or disabling of network services.
Likely Case
Unauthorized access to SNMP data revealing network topology, device configurations, and performance metrics, potentially leading to reconnaissance for further attacks.
If Mitigated
Limited to SNMP read-only data exposure if community strings are properly secured and network access is restricted.
🎯 Exploit Status
Exploitation requires only SNMP access with known community strings; tools like snmpwalk can be used.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.1.7.x or later
Vendor Advisory: https://www.silver-peak.com/support/user-documentation/software-downloads
Restart Required: Yes
Instructions:
1. Download EdgeConnect 8.1.7.x or later from Silver Peak support portal. 2. Upload firmware to EdgeConnect appliance. 3. Apply firmware update through web interface or CLI. 4. Reboot device after update completes.
🔧 Temporary Workarounds
Change SNMP Community Strings
allModify SNMP community strings from default 'public' to strong, unique values.
configure
snmp-server community <new_community_string> ro
commit
Disable SNMP Service
allTurn off SNMP service if not required for monitoring.
configure
no snmp-server enable
commit
🧯 If You Can't Patch
- Restrict SNMP access using firewall rules to allow only trusted management IPs.
- Implement network segmentation to isolate SD-WAN management interfaces from untrusted networks.
🔍 How to Verify
Check if Vulnerable:
Use snmpwalk command: snmpwalk -v 2c -c public <device_ip> systemCheck Version:
show versionVerify Fix Applied:
Verify firmware version is 8.1.7.x or later and SNMP community strings are not 'public'.📡 Detection & Monitoring
Log Indicators:
- SNMP authentication failures
- Unexpected SNMP queries from unauthorized IPs
Network Indicators:
- SNMP traffic to/from non-management IPs
- SNMP queries using 'public' community string
SIEM Query:
source="snmpd" AND (community="public" OR community="private")