CVE-2025-57846
📋 TL;DR
Multiple i-フィルター products have incorrect default permissions that allow local authenticated attackers to replace service executables. This could lead to arbitrary code execution with SYSTEM privileges on affected systems. Organizations using these products are at risk.
💻 Affected Systems
- i-フィルター products (specific models not detailed in provided references)
⚠️ 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
Attacker gains full SYSTEM-level control over the system, enabling complete compromise, data theft, and lateral movement within the network.
Likely Case
Privilege escalation from a standard user account to SYSTEM, allowing installation of malware, persistence mechanisms, or credential harvesting.
If Mitigated
Limited impact if proper access controls and monitoring prevent unauthorized local access to affected systems.
🎯 Exploit Status
Exploitation requires local authenticated access; replacing executables with SYSTEM privileges is straightforward once permissions are bypassed.
🛠️ Fix & Mitigation
✅ Official Fix
Patch Version: Not specified in provided references
Vendor Advisory: https://www.daj.jp/shared/php/downloadset/c/parts.php?page=dl&filename=information_20250827_01.pdf
Restart Required: Yes
Instructions:
1. Review vendor advisory at provided URL. 2. Download and apply the latest patch from the vendor. 3. Restart affected systems to ensure changes take effect.
🔧 Temporary Workarounds
Restrict Local Access
windowsLimit local user access to systems running i-フィルター to trusted administrators only.
Harden File Permissions
windowsManually adjust permissions on i-フィルター service executables to prevent unauthorized writes.
icacls "C:\Path\To\iFilterService.exe" /deny Users:(W)
🧯 If You Can't Patch
- Implement strict access controls to limit local user accounts on affected systems.
- Monitor for unauthorized file modifications to i-フィルター executables using file integrity monitoring tools.
🔍 How to Verify
Check if Vulnerable:
Check if i-フィルター is installed and review file permissions on its service executables for overly permissive write access.Check Version:
Not specified; check vendor documentation for version query commands.Verify Fix Applied:
Verify that patches have been applied by checking the product version against the vendor's fixed version list and confirming file permissions are properly restricted.📡 Detection & Monitoring
Log Indicators:
- Unexpected modifications to i-フィルター executable files in Windows event logs or file access logs.
- Service restarts or failures related to i-フィルター services.
Network Indicators:
- Unusual outbound connections from systems running i-フィルター, potentially indicating command and control activity.
SIEM Query:
EventID=4663 AND ObjectName LIKE '%i-フィルター%' AND Accesses LIKE '%Write%'