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The CVE-2025-XXXX vulnerability in Paragon Partition Manager (version 17.9.1) stems from a null pointer dereference in `biontdrv.sys` due to an improperly validated `MasterLrp` structure in the input buffer. When a malicious actor sends a crafted IOCTL request without a valid `MasterLrp` structure, the driver fails to handle the null pointer, leading to a kernel crash or arbitrary code execution. This flaw allows local attackers to escalate privileges by exploiting the unchecked pointer dereference in kernel mode, potentially gaining SYSTEM-level access.
DailyCVE Form
Platform: Paragon Software
Version: 15 – 17.9.1
Vulnerability: Null Dereference
Severity: Critical
Date: 2025-03-03
Prediction: Patch by 2025-06-30
What Undercode Say
Check vulnerable driver version: wmic product where "name like 'Paragon%'" get version Debugging biontdrv.sys: windbg -y SymbolPath -c "!analyze -v" biontdrv.sys Kernel exploit PoC (simulated crash): echo "Exploit MasterLrp null-deref" > /dev/biontdrv
How Exploit
- Local attacker crafts IOCTL with invalid
MasterLrp. - Kernel dereferences null pointer, crashing or executing shellcode.
- Privilege escalation to SYSTEM via controlled memory write.
Protection from this CVE
- Apply vendor patch (check Paragon support page).
- Restrict driver loading via Group Policy.
- Monitor kernel-mode crashes in Event Viewer.
Impact
- Full system compromise via kernel exploit.
- Bypasses user-mode security checks.
- Critical for shared/workstation systems.
Sources:
Reported By: nvd.nist.gov
Extra Source Hub:
Undercode
