CVE-2025-0285 – This vulnerability in Paragon Software's Hard D... (How to Fix)

Q: What is the severity of CVE-2025-0285?

CVE-2025-0285 has a CVSS score of 7.8 (HIGH). This vulnerability in Paragon Software's Hard Disk Manager product line allows attackers to map arbitrary kernel memory through the biontdrv.sys driver. By exploiting improper validation of user-supplied data length, local attackers can escalate privileges from user to kernel mode. All users of affected Paragon Hard Disk Manager products are at risk.

📋 TL;DR

This vulnerability in Paragon Software's Hard Disk Manager product line allows attackers to map arbitrary kernel memory through the biontdrv.sys driver. By exploiting improper validation of user-supplied data length, local attackers can escalate privileges from user to kernel mode. All users of affected Paragon Hard Disk Manager products are at risk.

💻 Affected Systems

Products:

Paragon Hard Disk Manager
Paragon Backup & Recovery
Paragon Partition Manager
Other Paragon disk management products

Versions: All versions prior to security patches released in 2025

Operating Systems: Windows

Default Config Vulnerable: ⚠️ Yes

Notes: Affects all products in the Hard Disk Manager line that use the vulnerable biontdrv.sys driver. The driver loads by default with these products.

📦 What is this software?

⚠️ Risk & Real-World Impact

🔴

Worst Case

Complete system compromise with kernel-level access, enabling persistent malware installation, data theft, and disabling of security controls.

🟠

Likely Case

Local privilege escalation allowing attackers to gain SYSTEM/administrator privileges on compromised machines.

🟢

If Mitigated

Limited impact if proper patch management and least privilege principles are enforced, though kernel vulnerabilities remain serious.

🌐 Internet-Facing: LOW - This is a local privilege escalation requiring initial access to the system.

🏢 Internal Only: HIGH - Once an attacker gains initial access (via phishing, malware, etc.), they can exploit this to gain full system control.

🎯 Exploit Status

Public PoC: ✅ No

Weaponized: UNKNOWN

Unauthenticated Exploit: ✅ No

Complexity: MEDIUM

Requires local access and ability to execute code. Kernel driver vulnerabilities are attractive targets for sophisticated attackers.

🛠️ Fix & Mitigation

✅ Official Fix

Patch Version: Security updates released February 2025

Vendor Advisory: https://paragon-software.zendesk.com/hc/en-us/articles/32993902732817-IMPORTANT-Paragon-Driver-Security-Patch-for-All-Products-of-Hard-Disk-Manager-Product-Line-Biontdrv-sys

Restart Required: Yes

Instructions:

1. Visit Paragon Software support page. 2. Download latest security update for your product. 3. Install update. 4. Restart system. 5. Verify biontdrv.sys driver version is updated.

🔧 Temporary Workarounds

Disable vulnerable driver

windows

Prevent biontdrv.sys from loading by disabling the driver service

sc stop biontdrv
sc config biontdrv start= disabled

Remove driver file

windows

Delete or rename the vulnerable driver file

takeown /f C:\Windows\System32\drivers\biontdrv.sys
icacls C:\Windows\System32\drivers\biontdrv.sys /grant administrators:F
del C:\Windows\System32\drivers\biontdrv.sys

🧯 If You Can't Patch

Restrict local user privileges to prevent initial access
Implement application control to block execution of unauthorized programs

🔍 How to Verify

Check if Vulnerable:

Check if biontdrv.sys driver exists in C:\Windows\System32\drivers\ and verify version is older than February 2025 patches

Check Version:

powershell "Get-Item C:\Windows\System32\drivers\biontdrv.sys | Select-Object VersionInfo"

Verify Fix Applied:

Verify biontdrv.sys file version shows 2025 date or check Paragon product version is updated

📡 Detection & Monitoring

Log Indicators:

Driver load events for biontdrv.sys
Process creation with high privileges following user-level processes
Unexpected kernel driver installations

Network Indicators:

None - local exploit only

SIEM Query:

EventID=6 OR EventID=7 (Driver load) AND DriverName contains 'biontdrv'

📊 Metadata

CVE ID: CVE-2025-0285

CVSS v3 Score: 7.8 (HIGH)

CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

CWE: CWE-1284

EPSS Score: 0.04% exploit probability (9.8th percentile)

Published: March 3, 2025

Last Updated: June 25, 2025

🔗 References

https://paragon-software.zendesk.com/hc/en-us/articles/32993902732817-IMPORTANT-Paragon-Driver-Security-Patch-for-All-Products-of-Hard-Disk-Manager-Product-Line-Biontdrv-sys Vendor Advisory
https://www.kb.cert.org/vuls/id/726882 Third Party Advisory
https://www.paragon-software.com/support/#patches Product

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