CVE-2021-22658
📋 TL;DR
CVE-2021-22658 is a SQL injection vulnerability in Advantech iView software that allows attackers to execute arbitrary SQL commands. Successful exploitation can lead to privilege escalation to Administrator level. Organizations using Advantech iView versions prior to 5.7.03.6112 are affected.
💻 Affected Systems
- Advantech iView
📦 What is this software?
Iview by Advantech
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with administrative access, allowing data theft, system manipulation, and potential lateral movement within the network.
Likely Case
Privilege escalation to Administrator, enabling unauthorized access to sensitive industrial control system data and configuration changes.
If Mitigated
Limited impact with proper network segmentation and access controls, potentially preventing successful exploitation even if vulnerable.
🎯 Exploit Status
SQL injection vulnerabilities are well-understood and easily exploitable with standard tools. Some authentication may be required but could be bypassed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 5.7.03.6112
Vendor Advisory: https://www.advantech.com/support/details/firmware?id=1KLRK4F2F2M6K
Restart Required: Yes
Instructions:
1. Download iView version 5.7.03.6112 or later from Advantech support portal. 2. Backup current configuration. 3. Install the update following vendor instructions. 4. Restart the iView service or system. 5. Verify successful update.
🔧 Temporary Workarounds
Network Segmentation
allIsolate iView systems from untrusted networks and implement strict firewall rules.
Web Application Firewall
allDeploy WAF with SQL injection protection rules to block exploitation attempts.
🧯 If You Can't Patch
- Implement strict network access controls to limit connections to iView systems only from trusted sources.
- Monitor for SQL injection attempts in web server logs and implement intrusion detection rules.
🔍 How to Verify
Check if Vulnerable:
Check iView version in application interface or installation directory. Versions below 5.7.03.6112 are vulnerable.Check Version:
Check iView web interface or installation properties. On Windows: Check program version in Control Panel > Programs and Features.Verify Fix Applied:
Confirm iView version is 5.7.03.6112 or higher and test SQL injection attempts are blocked.📡 Detection & Monitoring
Log Indicators:
- SQL syntax errors in web server logs
- Unusual database queries
- Multiple failed login attempts followed by successful admin access
Network Indicators:
- HTTP requests containing SQL keywords (SELECT, UNION, etc.) to iView endpoints
- Unusual database connection patterns
SIEM Query:
source="iView_logs" AND ("sql" OR "union" OR "select" OR "1=1")