CVE-2020-24683
📋 TL;DR
CVE-2020-24683 is an authentication bypass vulnerability in S+ Operations software where client-side authentication can be circumvented, allowing unauthorized connections to the server. This affects S+ Operations version 2.1 SP1 and earlier. Attackers can potentially gain unauthorized access to industrial control systems.
💻 Affected Systems
- ABB S+ Operations
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of industrial control systems, allowing attackers to manipulate processes, disrupt operations, or cause physical damage.
Likely Case
Unauthorized access to control systems enabling data theft, monitoring of operations, or preparation for further attacks.
If Mitigated
Limited impact with proper network segmentation and monitoring, though authentication bypass remains possible.
🎯 Exploit Status
Authentication bypass requires network access but no credentials.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 2.1 SP2 or later
Vendor Advisory: https://search.abb.com/library/Download.aspx?DocumentID=2PAA123980&LanguageCode=en&DocumentPartId=&Action=Launch
Restart Required: Yes
Instructions:
1. Download patch from ABB advisory. 2. Apply to all affected S+ Operations installations. 3. Restart systems. 4. Verify authentication now requires server validation.
🔧 Temporary Workarounds
Network Segmentation
allIsolate S+ Operations systems from untrusted networks
Firewall Rules
allRestrict access to S+ Operations ports to authorized IPs only
🧯 If You Can't Patch
- Implement strict network segmentation and access controls
- Monitor for unauthorized connection attempts and implement intrusion detection
🔍 How to Verify
Check if Vulnerable:
Check S+ Operations version in software interface or installation directoryCheck Version:
Check via S+ Operations interface or installation propertiesVerify Fix Applied:
Verify version is 2.1 SP2 or later and test authentication requires server validation📡 Detection & Monitoring
Log Indicators:
- Unauthorized connection attempts
- Failed authentication events
- Unexpected client connections
Network Indicators:
- Traffic to S+ Operations ports from unauthorized sources
- Authentication bypass attempts
SIEM Query:
source_ip NOT IN authorized_list AND destination_port IN [s+_operations_ports]