CVE-2023-47020
📋 TL;DR
This vulnerability in NCR Terminal Handler v1.5.1 allows attackers to chain multiple CSRF attacks to create new user accounts and add them to administrator groups. Attackers can exploit an insecure WSDL function that accepts custom content types without proper security controls. Organizations using NCR Terminal Handler v1.5.1 are affected.
💻 Affected Systems
- NCR Terminal Handler
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with attacker gaining administrative privileges, potentially leading to data theft, system manipulation, or further network penetration.
Likely Case
Unauthorized administrative account creation leading to privilege escalation and potential data access or system configuration changes.
If Mitigated
Limited impact with proper CSRF protections and input validation in place.
🎯 Exploit Status
Exploitation requires the attacker to trick an authenticated user into visiting a malicious page, but the exploit itself is straightforward once the CSRF attack is initiated.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not available
Vendor Advisory: Not available
Restart Required: No
Instructions:
No official patch available. Check NCR vendor resources for updates.
🔧 Temporary Workarounds
Implement CSRF Tokens
allAdd CSRF tokens to all state-changing requests and validate them server-side.
Restrict WSDL Access
allLimit access to the WSDL interface to trusted networks or disable it if not required.
🧯 If You Can't Patch
- Implement network segmentation to isolate NCR Terminal Handler from untrusted networks
- Deploy web application firewall (WAF) with CSRF protection rules
🔍 How to Verify
Check if Vulnerable:
Check if running NCR Terminal Handler v1.5.1 and review WSDL interface for CSRF protections.Check Version:
Check application documentation or configuration files for version information.Verify Fix Applied:
Test if CSRF tokens are required for user creation and group assignment operations.📡 Detection & Monitoring
Log Indicators:
- Unexpected user account creation
- Administrative group membership changes
- WSDL interface access from unusual sources
Network Indicators:
- CSRF attack patterns in web traffic
- Requests to user creation endpoints without proper referrer headers
SIEM Query:
Search for: (event_type="user_creation" OR event_type="group_membership_change") AND source_ip NOT IN trusted_networks