CVE-2022-4126
📋 TL;DR
CVE-2022-4126 is a vulnerability in ABB RCCMD software on Windows, Linux, and macOS, where the system uses default or common passwords, allowing attackers to easily guess credentials and gain unauthorized access. This affects RCCMD versions before 4.40 230207, potentially compromising systems running this software. Users of ABB RCCMD on any supported operating system are at risk if they have not updated or changed default settings.
💻 Affected Systems
- ABB RCCMD
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Attackers gain full administrative control over the RCCMD system, leading to data theft, system manipulation, or deployment of ransomware across connected industrial networks.
Likely Case
Unauthorized access to the RCCMD interface, allowing attackers to view sensitive data, modify configurations, or disrupt operations in industrial environments.
If Mitigated
Limited impact if strong passwords are enforced and network access is restricted, but default credentials could still be exploited if not changed.
🎯 Exploit Status
Exploitation involves simple password guessing or brute-force attacks, making it accessible even to low-skilled attackers.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 4.40 230207 or later
Vendor Advisory: https://search.abb.com/library/Download.aspx?DocumentID=2CMT006099_EN&LanguageCode=en&DocumentPartId=&Action=Launch
Restart Required: Yes
Instructions:
1. Download the updated version from the ABB advisory. 2. Install the patch following ABB's installation guide. 3. Restart the RCCMD service or system as required.
🔧 Temporary Workarounds
Change Default Passwords
allManually change all default or common passwords to strong, unique ones to prevent unauthorized access.
Use the RCCMD interface to update passwords; no specific command provided by vendor.
Restrict Network Access
allLimit access to RCCMD systems by implementing firewall rules or network segmentation.
Example for Linux: sudo iptables -A INPUT -p tcp --dport [RCCMD_PORT] -s [TRUSTED_IP] -j ACCEPT
Example for Windows: Use Windows Firewall to block inbound connections to RCCMD ports from untrusted networks.
🧯 If You Can't Patch
- Immediately change all default passwords to complex, unique ones and enforce regular password rotation.
- Isolate RCCMD systems from untrusted networks and monitor for unauthorized access attempts.
🔍 How to Verify
Check if Vulnerable:
Check the RCCMD version in the software interface or configuration files; if it is before 4.40 230207, it is vulnerable. Also, verify if default passwords are in use by reviewing password settings.Check Version:
On Linux/macOS: Check the RCCMD configuration file or run the software with a version flag if available. On Windows: Use the software's about or help menu to view version details.Verify Fix Applied:
Confirm the version is 4.40 230207 or later via the RCCMD interface and ensure all passwords have been changed from defaults.📡 Detection & Monitoring
Log Indicators:
- Failed login attempts with common usernames like 'admin' or 'root'
- Successful logins from unexpected IP addresses or at unusual times
Network Indicators:
- Unusual traffic patterns to RCCMD ports, such as repeated connection attempts from external sources
SIEM Query:
Example: 'source="RCCMD_logs" AND (event_type="login_failure" OR event_type="login_success") AND user IN ("admin", "root", "user")'