CVE-2024-41637
📋 TL;DR
CVE-2024-41637 is a privilege escalation vulnerability in RaspAP web GUI where the www-data user has write access to the restapi.service file and can execute critical commands via sudo without password authentication. This allows attackers to gain root privileges on affected systems. Users running RaspAP versions before 3.1.5 are affected.
💻 Affected Systems
- RaspAP (Raspberry Pi Access Point web GUI)
⚠️ Manual Verification Required
This CVE does not have specific version information in our database, so automatic vulnerability detection cannot determine if your system is affected.
Why? The CVE database entry doesn't specify which versions are vulnerable (no version ranges provided by the vendor/NVD).
🔒 Custom verification scripts are available for registered users. Sign up free to download automated test scripts.
- Review the CVE details at NVD
- Check vendor security advisories for your specific version
- Test if the vulnerability is exploitable in your environment
- Consider updating to the latest version as a precaution
⚠️ Risk & Real-World Impact
Worst Case
Complete system compromise with root access, allowing installation of persistent backdoors, data theft, and use as pivot point in network attacks.
Likely Case
Local privilege escalation to root, enabling full control over the Raspberry Pi device and connected network interfaces.
If Mitigated
Limited impact with proper access controls and network segmentation in place.
🎯 Exploit Status
Exploitation requires initial access as www-data user or ability to write to restapi.service file. Public exploit details available in referenced blog posts.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 3.1.5
Vendor Advisory: https://github.com/RaspAP/raspap-webgui
Restart Required: Yes
Instructions:
1. Backup current configuration. 2. Update RaspAP using: sudo apt update && sudo apt upgrade raspap-webgui. 3. Alternatively, manually update from GitHub repository. 4. Restart the service: sudo systemctl restart raspap.service.
🔧 Temporary Workarounds
Remove www-data sudo privileges
linuxRemove or restrict sudo permissions for www-data user to prevent command execution.
sudo visudo
Remove or comment out lines granting www-data sudo privileges without password
Restrict restapi.service file permissions
linuxChange file permissions to prevent www-data from writing to restapi.service.
sudo chmod 644 /etc/systemd/system/restapi.service
sudo chown root:root /etc/systemd/system/restapi.service
🧯 If You Can't Patch
- Implement strict network segmentation to isolate affected devices
- Monitor for suspicious activity from www-data user and restapi.service modifications
🔍 How to Verify
Check if Vulnerable:
Check RaspAP version: cat /etc/raspap/version.txt or check installed package version. Also verify www-data sudo permissions: sudo -l -U www-dataCheck Version:
cat /etc/raspap/version.txt || dpkg -l | grep raspap-webguiVerify Fix Applied:
Confirm version is 3.1.5 or later and verify www-data no longer has unrestricted sudo privileges.📡 Detection & Monitoring
Log Indicators:
- sudo commands executed by www-data user
- Modifications to /etc/systemd/system/restapi.service
- Unusual service restarts or system modifications
Network Indicators:
- Unexpected outbound connections from Raspberry Pi device
- Network configuration changes from www-data context
SIEM Query:
source="auth.log" AND (user="www-data" AND program="sudo") OR (filepath="/etc/systemd/system/restapi.service" AND action="modify")