CVE-2020-7388
📋 TL;DR
CVE-2020-7388 is an unauthenticated remote command execution vulnerability in Sage X3's AdxDSrv.exe component that allows attackers to bypass authentication and execute arbitrary commands with SYSTEM privileges. This affects on-premises versions of Sage X3 before specific Syracuse component updates. Attackers can chain this with CVE-2020-7387 to discover installation paths needed for exploitation.
💻 Affected Systems
- Sage X3
- Sage X3 HR & Payroll
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with SYSTEM privileges, allowing installation of persistent malware, data exfiltration, and lateral movement across the network.
Likely Case
Unauthenticated attackers gaining full control of the Sage X3 server, potentially accessing sensitive business data and using the system as a foothold for further attacks.
If Mitigated
Limited impact if proper network segmentation and access controls prevent external access to vulnerable components.
🎯 Exploit Status
Exploitation requires knowledge of installation path, which can be obtained via CVE-2020-7387. Public exploit code and technical details are available.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: AdxAdmin 93.2.53 with Syracuse updates: Version 9 (9.22.7.2+), Version 11 (11.25.2.6+), Version 12 (12.10.2.8+), Sage X3 HR & Payroll Version 9 (9.24.1.3+)
Vendor Advisory: https://www.sagecity.com/gb/sage-x3-uk/f/sage-x3-uk-announcements-news-and-alerts/147993/sage-x3-latest-patches
Restart Required: Yes
Instructions:
1. Download latest patches from Sage support portal. 2. Apply AdxAdmin 93.2.53 update. 3. Apply relevant Syracuse component updates based on your version. 4. Restart Sage X3 services and verify functionality.
🔧 Temporary Workarounds
Network Access Restriction
windowsBlock external access to Sage X3 AdxDSrv.exe component (typically port 1818/TCP) using firewall rules.
netsh advfirewall firewall add rule name="Block Sage X3 AdxDSrv" dir=in action=block protocol=TCP localport=1818
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Sage X3 servers from untrusted networks and internet access.
- Deploy application control/whitelisting to prevent execution of unauthorized binaries on Sage X3 servers.
🔍 How to Verify
Check if Vulnerable:
Check AdxAdmin version (should be < 93.2.53) and Syracuse component versions against affected ranges. Review system logs for unauthorized authentication attempts.Check Version:
Check Sage X3 administration console or installation directory for version information. For Windows: Review installed programs in Control Panel or check file properties of AdxDSrv.exe.Verify Fix Applied:
Verify AdxAdmin version is 93.2.53 or higher and Syracuse components meet minimum patched versions. Test authentication functionality remains intact.📡 Detection & Monitoring
Log Indicators:
- Failed authentication attempts followed by successful SYSTEM-level command execution
- Unusual process creation from AdxDSrv.exe
- Authentication bypass events in Sage X3 logs
Network Indicators:
- Unusual traffic to port 1818/TCP from untrusted sources
- Authentication requests with manipulated parameters
SIEM Query:
source="sage_x3_logs" AND (event_type="auth_bypass" OR process_name="AdxDSrv.exe" AND parent_process="SYSTEM")🔗 References
- https://rapid7.com/blog/post/2021/07/07/sage-x3-multiple-vulnerabilities-fixed
- https://www.sagecity.com/gb/sage-x3-uk/f/sage-x3-uk-announcements-news-and-alerts/147993/sage-x3-latest-patches
- https://www.rapid7.com/blog/post/2021/07/07/cve-2020-7387-7390-multiple-sage-x3-vulnerabilities/
- https://rapid7.com/blog/post/2021/07/07/sage-x3-multiple-vulnerabilities-fixed
- https://www.sagecity.com/gb/sage-x3-uk/f/sage-x3-uk-announcements-news-and-alerts/147993/sage-x3-latest-patches
