CVE-2025-67792

Executive Summary

CVE-2025-67792 is a local privilege escalation vulnerability in DriveLock, a device control and endpoint security solution. The vulnerability allows a local unprivileged user to manipulate a DriveLock process to execute arbitrary commands on Windows computers. This is a serious security flaw as it can allow an attacker to gain elevated privileges and compromise the entire system. The vulnerability affects DriveLock versions 24.1 before 24.1.6, 24.2 before 24.2.7, and 25.1 before 25.1.5. No public proof-of-concept or exploit code is currently available, and the CVSS score is listed as 0.0, indicating incomplete scoring data. The vendor has released patches for the affected versions.

Supply Chain & Package Security

This vulnerability is not related to an open-source package manager (NPM, PyPI, Go, Ruby). It is a proprietary software vulnerability in DriveLock, a commercial endpoint security product. The risk is primarily to organizations that deploy DriveLock on their Windows endpoints.

CVSS Breakdown & Threat Level

The CVSS score is listed as 0.0, which is likely a placeholder or incomplete data. Based on the description, a reasonable CVSS v3.1 vector would be:

• Attack Vector (AV): Local (L) - The attacker must have local access to the system.
• Attack Complexity (AC): Low (L) - The attack does not require special conditions.
• Privileges Required (PR): Low (L) - The attacker needs unprivileged access.
• User Interaction (UI): None (N) - No user interaction is required.
• Scope (S): Unchanged (U) - The vulnerability does not cross a trust boundary.
• Confidentiality (C): High (H) - Arbitrary command execution can lead to data exfiltration.
• Integrity (I): High (H) - Arbitrary command execution can modify system files.
• Availability (A): High (H) - Arbitrary command execution can disrupt services.

Estimated CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H Estimated Base Score: 7.8 (High)

Threat Level: High. The vulnerability allows a local attacker to escalate privileges to SYSTEM level, potentially leading to full system compromise.

Deep Dive & Mechanics

The vulnerability resides in how DriveLock handles process manipulation. A local unprivileged user can interact with a DriveLock process (likely a service or agent running with SYSTEM privileges) to inject commands or modify its behavior. The exact mechanism is not publicly disclosed, but common patterns for such vulnerabilities include:

• Insecure Named Pipes: The DriveLock process may expose a named pipe that allows unprivileged users to send commands.
• DLL Hijacking: The process may load a DLL from a path writable by unprivileged users.
• Unquoted Service Path: The service path may contain spaces and not be quoted, allowing an attacker to place a malicious executable.
• Weak Permissions on Service Objects: The service may have weak DACLs allowing unprivileged users to modify its configuration or binary.

The attacker can leverage this to execute arbitrary commands with the privileges of the DriveLock process, typically SYSTEM.

Vulnerable vs. Patched Code

No specific code diff is available. The patch likely involves:

• Strengthening Access Controls: Restricting which users can interact with the DriveLock process.
• Input Validation: Sanitizing commands or inputs received from unprivileged users.
• Secure Service Configuration: Ensuring the service runs with least privilege and proper path quoting.

Exploitation & Lab Setup

Red Team

Objective: Escalate privileges from a local unprivileged user to SYSTEM.

Prerequisites:

• A Windows system with a vulnerable DriveLock version installed.
• Local unprivileged shell access (e.g., via a phishing attack or another vulnerability).

Exploitation Steps (Hypothetical):

1. Enumerate DriveLock Processes:

   Get-Process -Name *drivelock*
   

2. Identify Weak Permissions: Use tools like accesschk or icacls to check for writable service binaries or named pipes.

   accesschk.exe -uwcqv "Authenticated Users" C:\Program Files\DriveLock\*
   

3. Exploit Weakness: If a named pipe is found, send a crafted command:

   $pipe = new-object System.IO.Pipes.NamedPipeClientStream(".", "DriveLockPipe", [System.IO.Pipes.PipeDirection]::Out)
   $pipe.Connect()
   $writer = new-object System.IO.StreamWriter($pipe)
   $writer.WriteLine("execute cmd /c whoami > C:\temp\output.txt")
   $writer.Dispose()
   

4. Verify Privilege Escalation: Check the output file to confirm execution as SYSTEM.

Note: This is a hypothetical example. Actual exploitation requires reverse engineering the specific vulnerable component.

Blue Team

Detection & Prevention:

1. Monitor Process Creation: Look for cmd.exe or powershell.exe spawned by DriveLock processes.

   Get-WinEvent -FilterHashtable @{LogName='Security'; ID=4688} | Where-Object {$_.Properties[4].Value -like '*drivelock*'}
   

2. Audit Named Pipe Connections: Enable auditing for named pipe creation and connection events (Event ID 5145).

3. Harden System Configuration:

   • Apply the vendor patch immediately.
   • Restrict local user permissions.
   • Use AppLocker or WDAC to block unauthorized executables.

Indicators of Compromise (IOCs)

• Process Anomalies: DriveLock processes spawning cmd.exe, powershell.exe, or other shells.
• Named Pipe Activity: Unusual connections to named pipes owned by DriveLock.
• File System Changes: Creation of unexpected files in C:\Windows\Temp or C:\Temp by SYSTEM account.
• Registry Modifications: Changes to DriveLock service keys under HKLM\SYSTEM\CurrentControlSet\Services\.

Detection Engineering

YARA Rule

rule CVE_2025_67792_DriveLock_Escalation {
    meta:
        description = "Detects potential exploitation of CVE-2025-67792 via process creation anomalies"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2025-67792"
    strings:
        $s1 = "DriveLock" nocase
        $s2 = "cmd.exe" nocase
        $s3 = "powershell.exe" nocase
    condition:
        $s1 and ($s2 or $s3)
}

Sigma Rule

title: DriveLock Process Spawning Shell
id: 8a9b7c6d-5e4f-3a2b-1c0d-9e8f7a6b5c4d
status: experimental
description: Detects DriveLock processes spawning command shells, indicative of CVE-2025-67792 exploitation
references:
    - https://nvd.nist.gov/vuln/detail/CVE-2025-67792
author: Valters IT
date: 2025-04-10
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith:
            - '\drivelock.exe'
            - '\drivelockservice.exe'
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
    condition: selection
falsepositives:
    - Legitimate administrative activity
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2025-67792 DriveLock Potential C2 Beaconing"; flow:to_server,established; content:"DriveLock"; nocase; content:"cmd"; nocase; distance:0; within:100; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Patch: Upgrade to DriveLock 24.1.6, 24.2.7, or 25.1.5 as applicable.
2. Restrict Local Access: Limit the number of users with local logon rights.
3. Monitor: Implement the detection rules above to identify potential exploitation attempts.

Long-Term Measures:

• Principle of Least Privilege: Ensure services run with the minimum necessary privileges.
• Regular Auditing: Periodically audit service permissions and configurations.
• Vendor Communication: Subscribe to DriveLock security advisories.

Valters IT
Securing Your Digital Frontier