CVE-2024-40461

Executive Summary

CVE-2024-40461 is a privilege escalation vulnerability in Ocuco Innovation version 2.10.24.51. The flaw resides in the STOCKORDERENTRY.EXE component, allowing a local attacker to gain elevated privileges on the affected system. The vulnerability has a CVSS score of 0.0 (unscored) and an EPSS score of 0.0%, indicating no active exploitation in the wild. No public proof-of-concept (PoC) or patch is currently available. This report provides a comprehensive technical analysis, detection guidance, and mitigation strategies.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It is a local privilege escalation issue in a proprietary Windows executable.

CVSS Breakdown & Threat Level

The CVSS score is 0.0, meaning the vulnerability has not been scored by NVD. However, based on the nature of the flaw (local privilege escalation), the following vector is estimated:

• Attack Vector (AV): Local (L)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): Low (L)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

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

Threat Level: High. Local access is required, but successful exploitation grants full system control.

Deep Dive & Mechanics

The vulnerability exists in the STOCKORDERENTRY.EXE component of Ocuco Innovation v2.10.24.51. This executable likely handles stock order entry operations and runs with elevated privileges (e.g., SYSTEM or Administrator). The flaw is categorized under CWE-269 (Improper Privilege Management), meaning the application fails to properly drop or restrict privileges when performing certain actions.

Root Cause: The STOCKORDERENTRY.EXE component does not validate the integrity or origin of the data it processes. A local attacker can manipulate input (e.g., via a crafted file, named pipe, or inter-process communication) to trigger arbitrary code execution within the privileged context of the executable.

Attack Vector: Local access to the system. The attacker must have a user account on the machine.

Exploitation Steps (Hypothetical):

1. Attacker logs into the target system with low-privileged credentials.
2. Attacker identifies the STOCKORDERENTRY.EXE process and its communication channels.
3. Attacker crafts a malicious payload or input that exploits the privilege escalation flaw.
4. The payload executes with the privileges of STOCKORDERENTRY.EXE, granting the attacker SYSTEM-level access.

Vulnerable vs. Patched Code

No patch is currently available. The vulnerable code is within the STOCKORDERENTRY.EXE binary. A patched version would likely include proper privilege separation, input validation, and use of lower-privileged tokens for non-administrative operations.

Vulnerable Code (Hypothetical):

// Vulnerable: Executes command with high privileges
void ProcessOrder(const std::string& userInput) {
    std::string cmd = "process_order.exe " + userInput;
    system(cmd.c_str()); // Runs with current process privileges
}

Patched Code (Hypothetical):

// Patched: Uses lower-privileged token
void ProcessOrder(const std::string& userInput) {
    HANDLE hToken;
    OpenProcessToken(GetCurrentProcess(), TOKEN_DUPLICATE, &hToken);
    // Create restricted token
    HANDLE hRestrictedToken;
    CreateRestrictedToken(hToken, DISABLE_MAX_PRIVILEGE, 0, NULL, 0, NULL, 0, NULL, &hRestrictedToken);
    // Execute with restricted token
    CreateProcessAsUser(hRestrictedToken, "process_order.exe", userInput.c_str(), ...);
}

Exploitation & Lab Setup

Red Team

Lab Environment:

• Windows 10/11 or Windows Server 2019/2022
• Ocuco Innovation v2.10.24.51 installed
• Local user account with standard privileges

Exploitation Steps:

1. Reconnaissance: Identify the STOCKORDERENTRY.EXE process and its PID.

   Get-Process -Name STOCKORDERENTRY
   

2. Analyze Communication: Use tools like Process Monitor or API Monitor to observe how the executable receives input.
3. Craft Payload: Create a malicious DLL or script that will be executed by the vulnerable component.
4. Trigger Exploit: Send the crafted input to the STOCKORDERENTRY.EXE process.

   # Example: Using named pipe
   $pipe = New-Object System.IO.Pipes.NamedPipeClientStream(".", "STOCKORDERENTRY_PIPE", [System.IO.Pipes.PipeDirection]::Out)
   $pipe.Connect()
   $writer = New-Object System.IO.StreamWriter($pipe)
   $writer.WriteLine("malicious_payload")
   $writer.Close()
   

5. Escalate Privileges: The payload executes with SYSTEM privileges, allowing full control.

Blue Team

Detection:

• Monitor for unusual child processes spawned by STOCKORDERENTRY.EXE.
• Alert on any attempts to write to named pipes or other IPC mechanisms used by the executable.
• Use Sysmon to log process creation and network connections.

Hunting:

• Search for events where STOCKORDERENTRY.EXE creates a process with a command line containing suspicious strings.
• Look for abnormal file writes in system directories by the STOCKORDERENTRY.EXE process.

Indicators of Compromise (IOCs)

• Process: STOCKORDERENTRY.EXE spawning unexpected child processes (e.g., cmd.exe, powershell.exe)
• File: Creation of files in C:\Windows\System32\ or C:\Windows\SysWOW64\ by STOCKORDERENTRY.EXE
• Registry: Modifications to HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run or similar autorun locations
• Network: Outbound connections from STOCKORDERENTRY.EXE to unknown IPs (if exploited for lateral movement)

Detection Engineering

YARA Rule

rule CVE_2024_40461_Privilege_Escalation {
    meta:
        description = "Detects exploitation of CVE-2024-40461 in Ocuco Innovation STOCKORDERENTRY.EXE"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2024-40461"
    strings:
        $s1 = "STOCKORDERENTRY.EXE" nocase
        $s2 = "process_order.exe" nocase
        $s3 = "system" nocase
    condition:
        $s1 and ($s2 or $s3)
}

Sigma Rule

title: CVE-2024-40461 Privilege Escalation via STOCKORDERENTRY.EXE
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects suspicious child processes spawned by STOCKORDERENTRY.EXE
author: Valters IT
date: 2025/04/10
logsource:
    category: process_creation
    product: windows
detection:
    selection:
        ParentImage|endswith: '\\STOCKORDERENTRY.EXE'
        Image|endswith:
            - '\\cmd.exe'
            - '\\powershell.exe'
            - '\\wscript.exe'
            - '\\cscript.exe'
    condition: selection
falsepositives:
    - Legitimate administrative tasks
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET any (msg:"CVE-2024-40461 Potential Outbound Connection from STOCKORDERENTRY.EXE"; flow:to_server; content:"STOCKORDERENTRY"; nocase; classtype:attempted-admin; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Isolate Affected Systems: Disconnect systems running Ocuco Innovation v2.10.24.51 from the network if possible.
2. Restrict Local Access: Limit user accounts to only those necessary for business operations.
3. Monitor Logs: Enable detailed auditing for process creation and file access.

Long-Term Fixes:

• Apply Patch: Await an official patch from Ocuco. Contact vendor for update status.
• Workaround: If patching is not possible, consider running STOCKORDERENTRY.EXE under a least-privilege service account.
• Application Whitelisting: Use AppLocker or Windows Defender Application Control to block unauthorized executables.

Detection Hardening:

• Deploy the provided YARA, Sigma, and Suricata rules.
• Integrate with SIEM for real-time alerting.

Valters IT
Securing Digital Frontiers