CVE-2023-44211
📋 TL;DR
This vulnerability allows unauthorized users to access and manipulate sensitive information in Acronis Cyber Protect products due to missing authorization checks. It affects Acronis Cyber Protect Cloud Agent and Acronis Cyber Protect 16 installations. Attackers could potentially read or modify protected data without proper credentials.
💻 Affected Systems
- Acronis Cyber Protect Cloud Agent
- Acronis Cyber Protect 16
📦 What is this software?
Agent by Acronis
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of protected backup data including exfiltration, modification, or deletion of sensitive information across all managed systems.
Likely Case
Unauthorized access to backup metadata and configuration data, potentially leading to data exposure or service disruption.
If Mitigated
Limited impact with proper network segmentation and access controls preventing unauthorized network access to vulnerable components.
🎯 Exploit Status
Exploitation requires network access to the vulnerable component but does not require authentication. The vulnerability is in the authorization layer.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Acronis Cyber Protect Cloud Agent build 31637 or later, Acronis Cyber Protect 16 build 37391 or later
Vendor Advisory: https://security-advisory.acronis.com/advisories/SEC-4061
Restart Required: Yes
Instructions:
1. Download the latest version from the Acronis portal. 2. Install the update on all affected systems. 3. Restart the Acronis services or reboot the systems as required.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Acronis management interfaces to authorized administrative networks only.
Access Control Lists
allImplement firewall rules to limit connections to Acronis services from trusted IP addresses only.
🧯 If You Can't Patch
- Implement strict network segmentation to isolate Acronis management interfaces from untrusted networks
- Monitor network traffic to Acronis services for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check the Acronis agent version in the management console or by running the agent with version flag.Check Version:
On Windows: 'acronis_agent.exe --version', On Linux: './acronis_agent --version' or check in /opt/acronis/ directoryVerify Fix Applied:
Verify the agent version is at or above the patched build numbers: 31637 for Cloud Agent, 37391 for Cyber Protect 16.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Acronis management APIs
- Unexpected data access patterns in backup logs
- Authentication bypass events
Network Indicators:
- Unusual connections to Acronis management ports (9876, 7780, etc.) from unauthorized sources
- Unexpected API calls to backup management endpoints
SIEM Query:
source="acronis*" AND (event_type="auth_failure" OR event_type="unauthorized_access")