CVE-2023-52335
📋 TL;DR
This SQL injection vulnerability in Advantech iView's ConfigurationServlet allows unauthenticated remote attackers to extract sensitive information like stored credentials from the database. All systems running vulnerable versions of Advantech iView with the ConfigurationServlet exposed are affected. The vulnerability exists because user input in the column_value parameter isn't properly sanitized before being used in SQL queries.
💻 Affected Systems
- Advantech iView
📦 What is this software?
Iview by Advantech
⚠️ Risk & Real-World Impact
Worst Case
Attackers extract all database contents including administrator credentials, configuration secrets, and sensitive system information, leading to complete system compromise and lateral movement within the network.
Likely Case
Attackers extract credential hashes or plaintext passwords, gain administrative access to iView, and potentially compromise connected industrial control systems.
If Mitigated
With proper network segmentation and access controls, attackers can only extract limited database information but cannot pivot to other systems.
🎯 Exploit Status
SQL injection vulnerabilities are commonly weaponized, and this requires no authentication with a simple exploit path
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in available references
Vendor Advisory: https://www.advantech.com/zh-tw/support/details/firmware?id=1-HIPU-183
Restart Required: Yes
Instructions:
1. Download the latest firmware from Advantech's advisory page. 2. Follow Advantech's firmware update procedure. 3. Restart the iView service or system.
🔧 Temporary Workarounds
Network Access Restriction
linuxBlock external access to TCP port 8080 using firewall rules
iptables -A INPUT -p tcp --dport 8080 -j DROP
Web Application Firewall
allDeploy WAF with SQL injection protection rules
🧯 If You Can't Patch
- Implement strict network segmentation to isolate iView systems from untrusted networks
- Deploy intrusion detection systems monitoring for SQL injection patterns on port 8080
🔍 How to Verify
Check if Vulnerable:
Check if ConfigurationServlet responds on port 8080 and test for SQL injection in column_value parameterCheck Version:
Check iView web interface or system documentation for version informationVerify Fix Applied:
Verify the firmware version matches patched version and test that SQL injection attempts no longer succeed📡 Detection & Monitoring
Log Indicators:
- Unusual SQL query patterns in iView logs
- Multiple failed login attempts following ConfigurationServlet access
Network Indicators:
- SQL injection patterns in HTTP requests to port 8080
- Unusual outbound database connections from iView server
SIEM Query:
source="iView" AND (http_request="*column_value*" AND (http_request="*SELECT*" OR http_request="*UNION*" OR http_request="*OR 1=1*"))