CVE-2024-5290
📋 TL;DR
This vulnerability in Ubuntu's wpa_supplicant allows local unprivileged users to load arbitrary shared objects, leading to privilege escalation to root. Attackers need membership in the netdev group or access to the wpa_supplicant D-Bus interface. This affects Ubuntu systems with vulnerable wpa_supplicant versions.
💻 Affected Systems
- wpa_supplicant
📦 What is this software?
⚠️ Risk & Real-World Impact
Worst Case
Local attacker gains full root privileges on the system, enabling complete system compromise, data theft, persistence, and lateral movement.
Likely Case
Local user with netdev group membership or D-Bus access escalates to root and installs backdoors, steals credentials, or modifies system configurations.
If Mitigated
With proper access controls and patching, impact is limited to denial of service or minimal privilege escalation if wpa_supplicant runs as non-root.
🎯 Exploit Status
Exploitation requires local access and specific privileges (netdev group or D-Bus access). Public proof-of-concept exists.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Fixed in Ubuntu security updates
Vendor Advisory: https://ubuntu.com/security/notices/USN-6945-1
Restart Required: Yes
Instructions:
1. Run 'sudo apt update' 2. Run 'sudo apt upgrade wpa' 3. Restart wpa_supplicant service or reboot system
🔧 Temporary Workarounds
Remove users from netdev group
linuxRemove unnecessary users from the netdev group to reduce attack surface
sudo deluser <username> netdev
Restrict D-Bus access
linuxConfigure D-Bus policies to restrict access to wpa_supplicant interface
🧯 If You Can't Patch
- Remove all non-essential users from the netdev group
- Implement strict D-Bus access controls and monitor for unauthorized access attempts
🔍 How to Verify
Check if Vulnerable:
Check wpa_supplicant version with 'wpa_supplicant -v' and compare against patched versions in USN-6945-1Check Version:
wpa_supplicant -vVerify Fix Applied:
Verify wpa_supplicant version is updated and check that users in netdev group are minimized📡 Detection & Monitoring
Log Indicators:
- Unusual wpa_supplicant module loading
- Failed privilege escalation attempts
- Unexpected D-Bus connections to wpa_supplicant
SIEM Query:
Process creation where parent process is wpa_supplicant and command line contains unusual module paths