CVE-2021-22652
📋 TL;DR
CVE-2021-22652 is an unauthenticated remote code execution vulnerability in Advantech iView industrial monitoring software. Attackers can access configuration interfaces without credentials, modify settings, and execute arbitrary code. This affects all iView installations prior to version 5.7.03.6112.
💻 Affected Systems
- Advantech iView
📦 What is this software?
Iview by Advantech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing attackers to execute arbitrary code, steal sensitive industrial data, disrupt operations, and pivot to other network systems.
Likely Case
Unauthorized configuration changes leading to service disruption, data manipulation, and potential ransomware deployment in industrial environments.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially only configuration viewing without execution.
🎯 Exploit Status
Public exploit code available on Packet Storm Security. Attack requires no authentication and minimal technical skill.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: v5.7.03.6112 or later
Vendor Advisory: https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02
Restart Required: Yes
Instructions:
1. Download iView v5.7.03.6112 or later from Advantech. 2. Backup current configuration. 3. Stop iView service. 4. Install updated version. 5. Restart service and verify functionality.
🔧 Temporary Workarounds
Network Access Control
windowsRestrict network access to iView interface using firewall rules
# Example Windows firewall rule: netsh advfirewall firewall add rule name="Block iView" dir=in action=block protocol=TCP localport=80,443 remoteip=any
Authentication Proxy
linuxPlace iView behind reverse proxy requiring authentication
# Example nginx config: location /iView { auth_basic "Restricted"; auth_basic_user_file /etc/nginx/.htpasswd; proxy_pass http://localhost:8080; }
🧯 If You Can't Patch
- Isolate iView systems in dedicated VLAN with strict firewall rules allowing only necessary industrial protocol traffic
- Implement network monitoring and intrusion detection specifically for iView traffic patterns
🔍 How to Verify
Check if Vulnerable:
Access iView configuration interface without credentials. If accessible, system is vulnerable.Check Version:
Check iView version in web interface or installed programs listVerify Fix Applied:
Attempt to access configuration interface without credentials. Should receive authentication prompt or access denied.📡 Detection & Monitoring
Log Indicators:
- Unauthenticated access to configuration endpoints
- Unexpected configuration changes
- New process execution from iView service
Network Indicators:
- Unusual outbound connections from iView server
- HTTP requests to configuration endpoints without authentication headers
SIEM Query:
source="iView" AND (url="*/config*" OR url="*/admin*" OR url="*/setup*") AND NOT auth_success="true"🔗 References
- http://packetstormsecurity.com/files/161937/Advantech-iView-Unauthenticated-Remote-Code-Execution.html
- https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02
- http://packetstormsecurity.com/files/161937/Advantech-iView-Unauthenticated-Remote-Code-Execution.html
- https://us-cert.cisa.gov/ics/advisories/icsa-21-040-02
