CVE-2025-24005
📋 TL;DR
This vulnerability allows a local attacker with SSH access to escalate privileges to root by exploiting improper input validation in a vulnerable script. Systems with local user accounts and the vulnerable script are affected. The attacker must have valid SSH credentials to exploit this.
💻 Affected Systems
- Unknown specific product - based on CWE-20 and description, likely a custom or third-party script
📦 What is this software?
Charx Sec 3000 Firmware by Phoenixcontact
Charx Sec 3050 Firmware by Phoenixcontact
Charx Sec 3100 Firmware by Phoenixcontact
Charx Sec 3150 Firmware by Phoenixcontact
⚠️ Risk & Real-World Impact
Worst Case
Full root compromise of the system, allowing complete control, data theft, persistence, and lateral movement.
Likely Case
Privilege escalation from a standard user to root, enabling installation of malware, data access, and system modification.
If Mitigated
Limited impact if proper access controls, least privilege, and monitoring are in place to detect unusual privilege escalation attempts.
🎯 Exploit Status
Exploitation requires local user SSH access. No public proof-of-concept is mentioned in the provided reference.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: https://certvde.com/de/advisories/VDE-2025-014
Restart Required: No
Instructions:
1. Check the vendor advisory at the provided URL for patch details. 2. Apply any available patches from the vendor. 3. If no patch, implement workarounds and monitor for updates.
🔧 Temporary Workarounds
Remove or Restrict Script Execution
linuxDisable or remove the vulnerable script to prevent exploitation.
sudo rm /path/to/vulnerable_script
sudo chmod 000 /path/to/vulnerable_script
Restrict SSH Access
linuxLimit SSH access to trusted users and IPs to reduce attack surface.
Edit /etc/ssh/sshd_config to set 'AllowUsers' or 'AllowGroups'
sudo systemctl restart sshd
🧯 If You Can't Patch
- Implement strict access controls: limit SSH to necessary users and use key-based authentication.
- Monitor system logs for unusual privilege escalation attempts and review script execution.
🔍 How to Verify
Check if Vulnerable:
Check if the vulnerable script exists and is executable: ls -la /path/to/script (path unknown from CVE). Review vendor advisory for specific details.Check Version:
Unknown - check vendor-specific commands from the advisory.Verify Fix Applied:
After applying patches or workarounds, verify the script is removed or non-executable, and test SSH access controls.📡 Detection & Monitoring
Log Indicators:
- Unusual SSH logins followed by privilege escalation attempts
- Execution of the vulnerable script with suspicious parameters in system logs
Network Indicators:
- SSH connections from unexpected sources leading to root access
SIEM Query:
source="sshd" AND (event="Accepted" OR event="Failed") | stats count by src_ip, user | where count > threshold