CVE-2025-0543
📋 TL;DR
CVE-2025-0543 is a local privilege escalation vulnerability in G DATA Security Client where incorrect directory permissions allow unprivileged local users to place malicious executables in globally writable directories. These executables are then executed with SYSTEM privileges by the SetupSVC.exe service. This affects all installations of vulnerable G DATA Security Client versions.
💻 Affected Systems
- G DATA Security Client
⚠️ 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
Full SYSTEM compromise leading to complete host takeover, credential theft, persistence establishment, and lateral movement capabilities.
Likely Case
Local attacker gains SYSTEM privileges to install malware, disable security controls, or access protected system resources.
If Mitigated
Limited impact if proper access controls and monitoring are in place to detect unauthorized file writes and privilege escalation attempts.
🎯 Exploit Status
Exploitation requires local access and knowledge of writable directories. No public exploit code is available at this time.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Latest version from G DATA (specific version not specified in reference)
Vendor Advisory: https://github.com/nullby73/security-advisories/tree/main/CVE-2025-0543
Restart Required: No
Instructions:
1. Update G DATA Security Client to the latest version. 2. Ensure the SetupSVC.exe service is updated. 3. Verify directory permissions have been corrected.
🔧 Temporary Workarounds
Restrict directory permissions
WindowsManually adjust permissions on globally writable directories used by SetupSVC.exe to prevent unauthorized file writes.
icacls "C:\Program Files\G DATA\SetupSVC\" /deny Users:(OI)(CI)W
icacls "C:\ProgramData\G DATA\SetupSVC\" /deny Users:(OI)(CI)W
🧯 If You Can't Patch
- Implement strict access controls to limit local user access to vulnerable systems.
- Monitor for suspicious file creation in G DATA directories and privilege escalation attempts.
🔍 How to Verify
Check if Vulnerable:
Check if SetupSVC.exe service exists and examine directory permissions in G DATA installation paths for excessive write permissions.Check Version:
Check G DATA Security Client version in program interface or registry: HKEY_LOCAL_MACHINE\SOFTWARE\G DATA\SecurityClient\VersionVerify Fix Applied:
Verify G DATA Security Client version is updated and check that directory permissions no longer allow unauthorized writes.📡 Detection & Monitoring
Log Indicators:
- Event logs showing file creation in G DATA directories by non-SYSTEM users
- Security logs showing privilege escalation attempts
Network Indicators:
- No network indicators - this is a local exploit
SIEM Query:
Process creation where parent process is SetupSVC.exe and command line contains suspicious executables from G DATA directories