CVE-2026-22619

Executive Summary

CVE-2026-22619 is a high-severity (CVSS 7.8) vulnerability affecting Eaton Intelligent Power Protector (IPP). The flaw stems from insecure library loading (DLL hijacking) within the IPP executable, allowing an attacker with local access to the software package to achieve arbitrary code execution. The attack vector is local, requiring user interaction (e.g., opening a malicious file or visiting a compromised share). The vulnerability has been patched by Eaton, and the latest version is available for download. No public proof-of-concept (PoC) or exploit code has been released, and the EPSS score is 0.0%, indicating low exploitation activity in the wild.

CVSS Breakdown & Threat Level

• CVSS Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
• Base Score: 7.8 (HIGH)
• Attack Vector (AV): Local – The attacker must have local access to the system or be able to place a malicious DLL in a location accessible to the vulnerable executable.
• Attack Complexity (AC): Low – No special conditions are required; the attack is straightforward.
• Privileges Required (PR): None – The attacker does not need any privileges to exploit the vulnerability.
• User Interaction (UI): Required – The victim must perform an action, such as opening a file or navigating to a directory containing the malicious DLL.
• Scope (S): Unchanged – The exploit cannot affect resources beyond the vulnerable component.
• Confidentiality (C): High – Full disclosure of sensitive data is possible.
• Integrity (I): High – The attacker can modify or delete data.
• Availability (A): High – The attacker can cause a denial of service or crash the application.

Threat Level: HIGH. Although no active exploitation has been observed, the vulnerability allows complete system compromise if exploited.

Deep Dive & Mechanics

The vulnerability is a classic DLL hijacking (CWE-427) issue. Eaton IPP loads a dynamic-link library (DLL) without specifying a full path, relying on the Windows search order. An attacker can place a malicious DLL with the same name as a legitimate one in a directory that Windows searches before the intended location (e.g., the current working directory, the user's Downloads folder, or a network share). When the IPP executable runs and attempts to load the DLL, it loads the attacker's malicious version instead, executing arbitrary code in the context of the IPP process.

Attack Scenario:

1. An attacker crafts a malicious DLL (e.g., msvcp140.dll or a custom IPP plugin DLL).
2. The attacker places this DLL in a directory the victim is likely to access (e.g., a shared folder, a USB drive, or a download location).
3. The victim launches the IPP executable from that directory or opens a file that triggers IPP to load the DLL.
4. The malicious DLL executes, granting the attacker code execution with the privileges of the IPP process (typically user-level, but could be elevated if IPP runs with higher privileges).

Vulnerable vs. Patched Code

Vulnerable Code (Conceptual): The vulnerable version of IPP likely uses relative paths or relies on the default DLL search order without using SetDllDirectory or specifying absolute paths. For example:

// Vulnerable: Loads DLL without full path
HMODULE hMod = LoadLibrary(L"helper.dll");

Patched Code (Conceptual): The patched version ensures that DLLs are loaded from a secure, application-specific directory using absolute paths or by calling SetDllDirectory to restrict the search path.

// Patched: Uses absolute path to load DLL
SetDllDirectory(L"C:\\Program Files\\Eaton\\IPP\\");
HMODULE hMod = LoadLibrary(L"C:\\Program Files\\Eaton\\IPP\\helper.dll");

Exploitation & Lab Setup

Red Team (Attack Simulation)

Prerequisites:

• Windows system with vulnerable Eaton IPP installed.
• Ability to place a file in a directory the victim will access (e.g., via phishing, USB drop, or network share).

Steps:

1. Craft Malicious DLL: Create a DLL that executes a payload (e.g., reverse shell, keylogger). Use tools like msfvenom or custom C code.

   // malicious_dll.cpp
   #include <windows.h>
   BOOL APIENTRY DllMain(HMODULE hModule, DWORD ul_reason_for_call, LPVOID lpReserved) {
       if (ul_reason_for_call == DLL_PROCESS_ATTACH) {
           // Execute payload, e.g., reverse shell
           WinExec("calc.exe", SW_SHOW); // Example: launch calculator
       }
       return TRUE;
   }
   

   Compile: x86_64-w64-mingw32-gcc -shared -o malicious.dll malicious_dll.cpp

2. Name the DLL: Identify a DLL that IPP loads (e.g., via Process Monitor). Common targets: msvcp140.dll, vcruntime140.dll, or custom IPP plugin DLLs.

3. Deploy the DLL: Place the malicious DLL in a directory the victim will access (e.g., C:\Users\Victim\Downloads\).

4. Trigger Execution: Convince the victim to run IPP from that directory or open a file that causes IPP to load the DLL.

Blue Team (Defense & Detection)

Detection Steps:

• Monitor for unusual DLL load events, especially from non-standard directories.
• Use Sysmon Event ID 7 (Image loaded) to track DLL loads.
• Enable Windows Defender Attack Surface Reduction (ASR) rules to block DLL sideloading.

Hunting Query (KQL):

DeviceEvents
| where ActionType == "DllLoaded"
| where FileName in~ ("msvcp140.dll", "vcruntime140.dll", "ipp*.dll")
| where FolderPath startswith "C:\\Users\\" or FolderPath startswith "C:\\Windows\\Temp\\"

Indicators of Compromise (IOCs)

• File Hashes (Example – replace with actual):
  • Malicious DLL: SHA256: a1b2c3d4e5f6...
• Network Indicators:
  • Outbound connections to attacker-controlled IPs (if payload is a reverse shell).
• Process Anomalies:
  • ipp.exe loading DLLs from %TEMP%, %USERPROFILE%\Downloads, or network shares.
• Registry Changes:
  • Unusual entries under HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\App Paths\IPP.exe.

Detection Engineering

YARA Rule

rule CVE_2026_22619_DLL_Hijack {
    meta:
        description = "Detects malicious DLLs targeting Eaton IPP DLL hijacking vulnerability"
        author = "Valters IT"
        date = "2025-04-10"
        reference = "CVE-2026-22619"
    strings:
        $s1 = "Eaton Intelligent Power Protector" nocase
        $s2 = "IPP" nocase
        $s3 = "DLLMain" nocase
    condition:
        uint16(0) == 0x5A4D and (1 of ($s1, $s2)) and $s3
}

Sigma Rule

title: Eaton IPP DLL Hijacking Attempt
id: 7a8b9c0d-1e2f-3a4b-5c6d-7e8f9a0b1c2d
status: experimental
description: Detects suspicious DLL loads from user-writable directories by Eaton IPP
author: Valters IT
date: 2025/04/10
references:
    - CVE-2026-22619
logsource:
    category: image_load
    product: windows
detection:
    selection:
        Image|endswith: '\ipp.exe'
        ImageLoaded|contains:
            - 'C:\Users\'
            - 'C:\Windows\Temp\'
            - '\\*\'
    condition: selection
falsepositives:
    - Legitimate DLL updates from user directories (rare)
level: high

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET $HTTP_PORTS (
    msg:"CVE-2026-22619 - Eaton IPP DLL Hijack - Potential Malicious DLL Download";
    flow:to_server,established;
    content:"GET"; http_method;
    content:"/download"; http_uri;
    content:"dll"; http_uri;
    classtype:attempted-user;
    sid:1000001;
    rev:1;
)

Remediation & Mitigation

Immediate Actions:

1. Update Eaton IPP: Download and install the latest version from the Eaton download center.
2. Restrict DLL Search Path: Use Group Policy to set SafeDllSearchMode to enabled.
3. Enable ASR Rules: Block DLL sideloading via Windows Defender Attack Surface Reduction.

Long-Term Measures:

• Implement application whitelisting (e.g., AppLocker) to only allow signed DLLs.
• Monitor for DLL load events using Sysmon and SIEM.
• Conduct regular security audits of third-party software.

Valters IT Signature This report was generated by Valters IT DevSecOps AI. For questions, contact Secure Channels (Signal / Portal).

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