CVE-2023-28701
📋 TL;DR
This is a critical SQL injection vulnerability in ELITE TECHNOLOGY CORP. Web Fax software that allows unauthenticated attackers to execute arbitrary SQL commands via the login page. Attackers can potentially execute system commands, disrupt services, or gain unauthorized access. All users of affected Web Fax versions are at risk.
💻 Affected Systems
- ELITE TECHNOLOGY CORP. Web Fax
📦 What is this software?
Webfax by Elite
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing remote code execution, data exfiltration, service disruption, and potential lateral movement within the network.
Likely Case
Unauthorized access to the Web Fax system, data theft, service disruption, and potential privilege escalation.
If Mitigated
Limited impact with proper input validation, WAF protection, and network segmentation preventing exploitation.
🎯 Exploit Status
SQL injection via login page is a well-understood attack vector with many existing tools and techniques available to attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://www.twcert.org.tw/tw/cp-132-7145-1a0d4-1.html
Restart Required: No
Instructions:
1. Contact ELITE TECHNOLOGY CORP. for patch availability 2. Apply vendor-provided security updates 3. Test in non-production environment first 4. Deploy to production systems
🔧 Temporary Workarounds
Web Application Firewall (WAF)
allDeploy WAF with SQL injection protection rules to block malicious payloads
Network Segmentation
allIsolate Web Fax server from critical networks and restrict access
🧯 If You Can't Patch
- Implement strict input validation and parameterized queries in the login page
- Disable or restrict access to the vulnerable Web Fax instance from untrusted networks
🔍 How to Verify
Check if Vulnerable:
Test login page with SQL injection payloads (e.g., ' OR '1'='1) in controlled environmentCheck Version:
Check Web Fax administration interface or contact vendor for version informationVerify Fix Applied:
Verify that SQL injection payloads no longer work and proper input validation is implemented📡 Detection & Monitoring
Log Indicators:
- Unusual SQL queries in application logs
- Multiple failed login attempts with SQL-like patterns
- Unexpected database errors
Network Indicators:
- SQL keywords in HTTP POST requests to login endpoint
- Unusual outbound database connections
SIEM Query:
source="web_fax_logs" AND (message="sql" OR message="injection" OR message="syntax error")