CVE-2024-49388
📋 TL;DR
CVE-2024-49388 is an authorization bypass vulnerability in Acronis Cyber Protect 16 that allows attackers to manipulate sensitive information without proper authentication. This affects Acronis Cyber Protect 16 installations on both Linux and Windows systems. Organizations using affected versions are vulnerable to unauthorized data access and modification.
💻 Affected Systems
- Acronis Cyber Protect 16
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete compromise of protected data including backup files, configuration settings, and potentially credentials, leading to data destruction, ransomware deployment, or sensitive information exfiltration.
Likely Case
Unauthorized access to backup data and configuration files, potentially enabling data theft, backup corruption, or privilege escalation within the Acronis environment.
If Mitigated
Limited impact with proper network segmentation, strong authentication controls, and monitoring, though the vulnerability still presents a significant security risk.
🎯 Exploit Status
While no public exploit exists, the vulnerability is rated with low complexity and could be weaponized relatively easily given the high CVSS score.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Build 38690 or later
Vendor Advisory: https://security-advisory.acronis.com/advisories/SEC-5984
Restart Required: Yes
Instructions:
1. Download the latest version from Acronis official website. 2. Backup current configuration. 3. Install the update. 4. Restart the Acronis Cyber Protect service. 5. Verify the update was successful.
🔧 Temporary Workarounds
Network Segmentation
allRestrict network access to Acronis Cyber Protect management interfaces to trusted IP addresses only
# Use firewall rules to restrict access to Acronis ports (typically 9876, 443)
Enhanced Monitoring
allImplement strict monitoring of Acronis Cyber Protect logs for unauthorized access attempts
# Configure log monitoring for Acronis Cyber Protect events
🧯 If You Can't Patch
- Implement strict network segmentation and firewall rules to limit access to Acronis Cyber Protect interfaces
- Enable detailed logging and monitoring for all access to Acronis Cyber Protect and review logs daily for suspicious activity
🔍 How to Verify
Check if Vulnerable:
Check the build version in Acronis Cyber Protect console under Help > About. If version is earlier than build 38690, the system is vulnerable.Check Version:
# On Windows: Check Acronis Cyber Protect version in Control Panel > Programs and Features
# On Linux: Check installed package version via package managerVerify Fix Applied:
Verify the build version shows 38690 or later in the About dialog. Test authorization controls to ensure proper access restrictions are functioning.📡 Detection & Monitoring
Log Indicators:
- Unauthorized access attempts to Acronis management interfaces
- Unexpected configuration changes
- Access to backup data from unauthorized accounts
Network Indicators:
- Unusual traffic patterns to Acronis management ports (9876, 443)
- Access from unexpected IP addresses
SIEM Query:
source="acronis" AND (event_type="unauthorized_access" OR event_type="configuration_change")