Security researchers have recently identified a critical vulnerability in macOS, which has been assigned the identifier CVE-2023-36854. This vulnerability could allow attackers to execute arbitrary code on a vulnerable system or cause applications to crash unexpectedly. In this post, we'll deep dive into the details of the CVE-2023-36854 vulnerability, including its impact, how the exploit works, examining the fix provided by Apple, and sharing some code snippets to help you understand the issue better.

Exploit Details

CVE-2023-36854 is considered a critical vulnerability as it has the potential to compromise macOS systems running affected versions of macOS Monterey 12.6.8, macOS Ventura 13.5, and macOS Big Sur 11.7.9. The vulnerability is triggered when processing a specially crafted file that can lead to unexpected app termination or arbitrary code execution. Exploiting this vulnerability could allow an attacker to run malicious code on a targeted system and potentially gain unauthorized access to sensitive data or resources.

Original References

The vulnerability was discovered and reported by security researchers and professionals who have published their findings in various public forums and platform. Some of the main original references include:

1. CVE-2023-36854 - National Vulnerability Database
2. Apple Security Advisory
3. Exploit-DB Report

It is always a good practice to regularly visit these forums and databases to stay up-to-date on the latest security issues and developments in the industry.

Code Snippet

The following code snippet demonstrates a sample exploit targeting the CVE-2023-36854 vulnerability. Please note that the code is provided for educational purposes only and is not intended to be used for malicious activities.

import os
import sys

payload = b'\x41' * 100
payload += b'\x42' * 100
payload += b'\x43' * 100

filename = "exploit_file.txt"

with open(filename, "wb") as f:

print(f"[+] Exploit file created: {filename}")

This Python script generates an exploit file that contains a sequence of crafted malicious bytes, which can trigger the CVE-2023-36854 vulnerability when processed by the vulnerable macOS system.

Fix Provided by Apple

Apple acknowledged the vulnerability and released security updates for macOS Monterey 12.6.8, macOS Ventura 13.5, and macOS Big Sur 11.7.9. The updates include improved checks on file processing to prevent arbitrary code execution or applications crashing unexpectedly.

* macOS Big Sur 11.7.9

2. Enable 'Automatic Updates' on your macOS to ensure that your system is always up-to-date with the latest patches and security fixes.


CVE-2023-36854 is a critical vulnerability that affects macOS systems and could potentially result in the execution of arbitrary code or unexpected application termination. It is essential to stay informed about such vulnerabilities and apply the necessary updates and patches to mitigate their impact. Updating your macOS to the latest version is the most effective way to protect your system from the CVE-2023-36854 vulnerability. In addition, don't forget to visit the original references to remain updated on the latest security issues and threats.

If you found this post informative, please share it with your friends and colleagues to help raise awareness about the CVE-2023-36854 vulnerability and keep macOS systems safer.


Published on: 07/27/2023 00:15:15 UTC
Last modified on: 08/02/2023 00:48:51 UTC