CVE-2025-23222
📋 TL;DR
This vulnerability allows unprivileged local users to access D-Bus services as root through the Deepin dde-api-proxy service, which runs with root privileges and forwards messages without proper authorization checks. This enables privilege escalation where non-root users can execute administrative actions. Systems running Deepin Linux with dde-api-proxy versions through 1.0.19 are affected.
💻 Affected Systems
- Deepin dde-api-proxy
⚠️ 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 where any local user gains root privileges, allowing installation of malware, data theft, and persistent backdoors.
Likely Case
Local privilege escalation where authenticated users gain administrative access to modify system settings, install packages, or access protected files.
If Mitigated
Limited impact if proper access controls, network segmentation, and user privilege separation are implemented.
🎯 Exploit Status
Exploitation requires local access and knowledge of D-Bus methods, but no authentication bypass is needed beyond having a local user account.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: 1.0.20 or later
Vendor Advisory: https://security.opensuse.org/2025/01/24/dde-api-proxy-privilege-escalation.html
Restart Required: No
Instructions:
1. Update dde-api-proxy package using your package manager. 2. For Deepin: sudo apt update && sudo apt upgrade dde-api-proxy. 3. Verify the service restarts automatically.
🔧 Temporary Workarounds
Disable dde-api-proxy service
allTemporarily disable the vulnerable service until patching is possible
sudo systemctl stop dde-api-proxy
sudo systemctl disable dde-api-proxy
Restrict D-Bus access
allConfigure D-Bus policy to restrict access to vulnerable interfaces
sudo cp /usr/share/dbus-1/system.d/com.deepin.api.Proxy.conf /usr/share/dbus-1/system.d/com.deepin.api.Proxy.conf.backup
sudo nano /usr/share/dbus-1/system.d/com.deepin.api.Proxy.conf
🧯 If You Can't Patch
- Implement strict user privilege separation and limit local user accounts
- Monitor D-Bus activity for suspicious root-level access attempts
🔍 How to Verify
Check if Vulnerable:
Check dde-api-proxy version: dpkg -l | grep dde-api-proxy or rpm -q dde-api-proxyCheck Version:
dpkg -l | grep dde-api-proxy || rpm -q dde-api-proxy || pacman -Q dde-api-proxyVerify Fix Applied:
Verify version is 1.0.20 or higher and check service status: systemctl status dde-api-proxy📡 Detection & Monitoring
Log Indicators:
- Unusual D-Bus method calls from non-root users to privileged services
- dde-api-proxy service errors or access violations
Network Indicators:
- Local D-Bus communication patterns showing privilege escalation attempts
SIEM Query:
process.name='dde-api-proxy' AND event.action='dbus_method_call' AND user.name!='root'