CVE-2024-22772
📋 TL;DR
This vulnerability in Hitron Systems DVR devices allows attackers to perform network attacks when default admin credentials are used. It affects Hitron DVR LGUVR-8H models running firmware versions 1.02 through 4.02. The issue stems from improper input validation that can be exploited when default credentials haven't been changed.
💻 Affected Systems
- Hitron Systems DVR LGUVR-8H
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise allowing unauthorized access to DVR footage, configuration changes, and potential use as a foothold for further network attacks.
Likely Case
Unauthorized access to DVR system allowing viewing/modification of surveillance footage and system settings.
If Mitigated
Limited impact if strong authentication is enforced and network segmentation is implemented.
🎯 Exploit Status
Exploitation requires knowledge of default credentials or credential compromise. The CWE-20 (Improper Input Validation) suggests additional attack vectors beyond credential issues.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Check vendor website for latest firmware >4.02
Vendor Advisory: http://www.hitron.co.kr/firmware/
Restart Required: Yes
Instructions:
1. Visit http://www.hitron.co.kr/firmware/ 2. Download latest firmware for LGUVR-8H 3. Follow vendor's firmware update procedure 4. Reboot device after update
🔧 Temporary Workarounds
Change Default Credentials
allImmediately change default admin username and password to strong, unique credentials
Network Segmentation
allIsolate DVR on separate VLAN or network segment with restricted access
🧯 If You Can't Patch
- Change all default credentials immediately and enforce strong password policy
- Implement network access controls to restrict DVR access to authorized IPs only
🔍 How to Verify
Check if Vulnerable:
Check firmware version in DVR web interface and verify if default credentials are still in useCheck Version:
Check via DVR web interface: System > Information > Firmware VersionVerify Fix Applied:
Verify firmware version is >4.02 and test authentication with changed credentials📡 Detection & Monitoring
Log Indicators:
- Failed login attempts with default credentials
- Multiple authentication failures from single IP
- Successful logins from unexpected locations
Network Indicators:
- Unusual traffic patterns to DVR management interface
- Port scanning targeting DVR ports (typically 80, 443, 554)
SIEM Query:
source="dvr_logs" AND (event_type="authentication" AND (username="admin" OR password="admin")) OR (event_type="configuration_change" AND user="admin")