CVE-2025-4532
📋 TL;DR
This critical vulnerability in SunloginClient allows local attackers to exploit an uncontrolled search path (DLL hijacking) in the sunlogin_guard.exe process. Attackers could execute arbitrary code with the privileges of the vulnerable process. Only users running the specific vulnerable version of SunloginClient are affected.
💻 Affected Systems
- Shanghai Bairui Information Technology SunloginClient
⚠️ 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
Local privilege escalation leading to full system compromise if sunlogin_guard.exe runs with elevated privileges.
Likely Case
Local attacker gains code execution with user-level privileges, potentially leading to lateral movement or data theft.
If Mitigated
Limited impact if proper application whitelisting and DLL search path restrictions are enforced.
🎯 Exploit Status
Exploit requires local access and specific conditions; exploit code is publicly available but difficult to execute.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Unknown
Vendor Advisory: None available
Restart Required: No
Instructions:
No official patch available. Consider uninstalling SunloginClient or upgrading to a newer version if available.
🔧 Temporary Workarounds
Restrict DLL Search Path
windowsUse Windows policies to restrict DLL search paths for vulnerable executables.
Set-ProcessMitigation -Name sunlogin_guard.exe -Enable ForceRelocateImages
Application Whitelisting
windowsImplement application control to prevent unauthorized DLL loading.
🧯 If You Can't Patch
- Uninstall SunloginClient if not required
- Implement strict user privilege management to limit local attack surface
🔍 How to Verify
Check if Vulnerable:
Check SunloginClient version in Control Panel > Programs and Features or by examining sunlogin_guard.exe file properties.Check Version:
wmic product where name="SunloginClient" get versionVerify Fix Applied:
Verify SunloginClient is uninstalled or updated to a version newer than 15.8.3.19819.📡 Detection & Monitoring
Log Indicators:
- Unusual DLL loading events from sunlogin_guard.exe in Windows Event Logs (Security/System)
Network Indicators:
- No network indicators - local exploitation only
SIEM Query:
EventID=7 OR EventID=11 AND ProcessName="sunlogin_guard.exe" AND DLLName NOT CONTAINS expected_dlls