CVE-2024-22078
📋 TL;DR
This vulnerability allows authenticated users on Elspec G5 digital fault recorders to escalate privileges from user to administrative level by exploiting weak filesystem permissions on network configuration scripts. It affects all versions up to 1.1.4.15. Organizations using these devices for power grid monitoring and protection are at risk.
💻 Affected Systems
- Elspec G5 digital fault recorder
📦 What is this software?
G5dfr Firmware by Elspec Ltd
⚠️ Risk & Real-World Impact
Worst Case
An attacker gains full administrative control over the fault recorder, potentially manipulating grid monitoring data, disabling protection functions, or using the device as a pivot point to attack other critical infrastructure systems.
Likely Case
Malicious insiders or compromised user accounts escalate privileges to modify device configurations, disrupt monitoring operations, or install persistent backdoors.
If Mitigated
With proper access controls and network segmentation, impact is limited to the specific device, though administrative compromise still poses significant risk to grid monitoring integrity.
🎯 Exploit Status
Exploitation requires authenticated user access but is technically simple once access is obtained.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Version 1.1.4.16 or later
Vendor Advisory: https://www.elspec-ltd.com/support/security-advisories/
Restart Required: Yes
Instructions:
1. Download the latest firmware from Elspec support portal. 2. Backup current configuration. 3. Apply firmware update following vendor instructions. 4. Verify file permissions on network configuration scripts are properly restricted.
🔧 Temporary Workarounds
Restrict file permissions
linuxManually change permissions on network configuration scripts to remove world-writable access
chmod 750 /path/to/network/scripts/*
chown root:admin /path/to/network/scripts/*
Restrict user access
allLimit which users can authenticate to the device and monitor for suspicious privilege escalation attempts
🧯 If You Can't Patch
- Implement strict network segmentation to isolate fault recorders from general network access
- Enable detailed logging and monitoring for file permission changes and privilege escalation attempts
🔍 How to Verify
Check if Vulnerable:
Check firmware version via device web interface or CLI. If version is 1.1.4.15 or earlier, check file permissions on network configuration scripts with 'ls -la /path/to/network/scripts/'Check Version:
Check device web interface or use vendor-specific CLI command for version displayVerify Fix Applied:
Verify firmware version is 1.1.4.16 or later and confirm network script permissions are not world-writable (should not have 'w' for 'others' in permission string)📡 Detection & Monitoring
Log Indicators:
- Unexpected file permission changes on network scripts
- User privilege escalation events
- Unauthorized configuration modifications
Network Indicators:
- Unusual administrative access patterns
- Configuration changes outside maintenance windows
SIEM Query:
source="elspec-g5" AND (event_type="file_permission_change" OR event_type="privilege_escalation")