CVE-2025-27816
📋 TL;DR
This vulnerability allows remote code execution on Arctera InfoScale servers through insecure deserialization of .NET remoting messages. Attackers can exploit this to gain full control of affected systems. Only servers with Disaster Recovery configured using the DR wizard are vulnerable.
💻 Affected Systems
- Arctera InfoScale
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise leading to data theft, ransomware deployment, or lateral movement across the network.
Likely Case
Remote code execution with SYSTEM/administrator privileges, allowing attackers to install malware, exfiltrate data, or disrupt operations.
If Mitigated
Limited impact if service is disabled or network access is restricted, though the vulnerability remains present.
🎯 Exploit Status
Insecure deserialization vulnerabilities are frequently exploited with publicly available tools and techniques.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 8.0.3 or later
Vendor Advisory: https://www.veritas.com/content/support/en_US/security/ARC25-002
Restart Required: Yes
Instructions:
1. Download and install InfoScale version 8.0.3 or later from Veritas support portal. 2. Restart affected systems. 3. Verify the Plugin_Host service is no longer vulnerable.
🔧 Temporary Workarounds
Disable Plugin_Host Service
windowsManually disable the vulnerable Windows service to eliminate the attack vector.
sc stop Plugin_Host
sc config Plugin_Host start= disabled
🧯 If You Can't Patch
- Disable the Plugin_Host service on all affected systems immediately.
- Implement network segmentation to restrict access to the .NET remoting endpoint (default port 9000).
🔍 How to Verify
Check if Vulnerable:
Check if InfoScale version is between 7.0 and 8.0.2 and Plugin_Host service is running.Check Version:
Get-WmiObject -Class Win32_Product | Where-Object {$_.Name -like '*InfoScale*'} | Select-Object Name, VersionVerify Fix Applied:
Verify InfoScale version is 8.0.3+ and Plugin_Host service is either patched or disabled.📡 Detection & Monitoring
Log Indicators:
- Unusual process creation from Plugin_Host service
- Failed authentication attempts to .NET remoting endpoint
- Abnormal network connections to port 9000
Network Indicators:
- Unexpected traffic to TCP port 9000
- .NET remoting protocol anomalies
- Suspicious serialized object payloads
SIEM Query:
source="windows" AND service="Plugin_Host" AND (event_id=4688 OR process_name="cmd.exe" OR process_name="powershell.exe")