CVE-2020-24384
📋 TL;DR
This vulnerability allows unauthenticated attackers to execute arbitrary code on A10 Networks ACOS and aGalaxy management GUIs. It affects ACOS versions 3.2.2+, 4.x, and 5.1.x, and aGalaxy versions 3.0.x, 3.2.x, and 5.0.x. Successful exploitation could lead to complete system compromise.
💻 Affected Systems
- A10 Networks ACOS
- A10 Networks aGalaxy
📦 What is this software?
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Advanced Core Operating System by A10networks
Agalaxy by A10networks
Agalaxy by A10networks
Agalaxy by A10networks
Agalaxy by A10networks
Agalaxy by A10networks
⚠️ Risk & Real-World Impact
Worst Case
Complete system takeover, data exfiltration, lateral movement within network, and persistent backdoor installation.
Likely Case
Unauthenticated remote code execution leading to service disruption, configuration changes, and credential theft.
If Mitigated
Limited impact if systems are isolated, patched, or have network controls preventing external access.
🎯 Exploit Status
Unauthenticated RCE with CVSS 9.8 suggests relatively straightforward exploitation.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: ACOS: 5.2.1 or later; aGalaxy: 5.1.0 or later
Vendor Advisory: https://support.a10networks.com/support/security_advisory/acos-agalaxy-gui-rce-vulnerability-cve-2020-24384
Restart Required: Yes
Instructions:
1. Download appropriate patch from A10 support portal. 2. Backup configuration. 3. Apply patch following vendor instructions. 4. Restart affected services/systems. 5. Verify patch installation.
🔧 Temporary Workarounds
Network Segmentation
allRestrict access to management interfaces to trusted IPs only
Configure firewall rules to allow only specific source IPs to management ports
Disable Management GUI
allTemporarily disable web management interface if not required
Consult A10 documentation for disabling GUI management
🧯 If You Can't Patch
- Implement strict network access controls to limit management interface exposure
- Monitor management interface traffic for suspicious activity and implement IDS/IPS rules
🔍 How to Verify
Check if Vulnerable:
Check ACOS/aGalaxy version against affected ranges via CLI or web interfaceCheck Version:
show version (ACOS CLI) or check System Information in web GUIVerify Fix Applied:
Verify installed version is ACOS 5.2.1+ or aGalaxy 5.1.0+📡 Detection & Monitoring
Log Indicators:
- Unusual authentication attempts to management interface
- Unexpected process execution
- Configuration changes from unknown sources
Network Indicators:
- Unusual traffic patterns to management ports
- Exploit-like payloads in HTTP requests to GUI
SIEM Query:
source_ip=* AND dest_port=(443,80,8443) AND dest_ip=ACOS_management AND http_user_agent contains suspicious_pattern