CVE-2023-35983 - Addressing the macOS File System Exploit

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Introduction

CVE-2023-35983 is a security vulnerability that affects specific versions of macOS operating systems. This security issue, when exploited, can allow an attacker to modify protected parts of the file system through a malicious app. Fortunately, Apple has acted promptly to solve the vulnerability by introducing improved data protection. The issue is fixed in macOS Monterey 12.6.8, macOS Ventura 13.5, and macOS Big Sur 11.7.9. In this post, we will delve into the details of the exploit, examining the code snippet related to the vulnerability and discussing the links to original references.

Exploit Details

Before the fix, an attacker could create a malicious app that exploited weak data protection mechanisms in macOS and gain the ability to modify protected parts of the file system. These file system sections are essential for the operating system's stability and security. When tampered with, they can lead to possible crashes, all kinds of misbehavior, or even a full system compromise.

To better understand the issue, let's examine a code snippet that demonstrates how the exploit works. Note that this is just an example, and there might be other variations of the exploit.

#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <sys/stat.h>
#include <fcntl.h>

int main() {
    int fileDesc;
    char *maliciousData = "This is the malicious data";

    // Access the protected file
    fileDesc = open("/path/to/protected/file", O_WRONLY);

    if (fileDesc < ) {
        printf("Failed to open file\n");
        exit(1);
    }

    // Write malicious data to the protected file
    if (write(fileDesc, maliciousData, sizeof(maliciousData)) < ) {
        printf("Failed to write malicious data\n");
        close(fileDesc);
        exit(2);
    }

    close(fileDesc);

    printf("Malicious data has been written\n");

    return ;
}

This code snippet demonstrates a simple program that tries to open a protected file and writes malicious data to it. Before the macOS updates mentioned earlier, this program could succeed in its malicious intent, but now the improved data protection mechanism prevents unauthorized access to the protected files.

Original References and Links

It is always vital to refer to original sources forCVE references and additional information. The primary source of information regarding the vulnerability is the official CVE database maintained by MITRE (CVE-2023-35983). You can find more details about the security issue, including information about affected software at this link: CVE-2023-35983 MITRE

Additional information regarding the macOS versionsIn which this issue has been addressed can be found in the official Apple security updates page: Apple Security Updates

Conclusion

CVE-2023-35983 was a significant security vulnerability that affected macOS users and posed a considerable risk to the file system's protected parts. Addressing this issue promptly and efficiently, Apple enhanced its data protection mechanism in the operating systems, specifically fixing the vulnerability in macOS Monterey 12.6.8, macOS Ventura 13.5, and macOS Big Sur 11.7.9.

If you are using one of the affected versions, we strongly recommend updating your system to the latest version available to prevent potential exploitation. It's essential to ensure that your macOS installation is updated with all the latest security patches and updates for maintaining robust security and protecting your most sensitive data.

Timeline

Published on: 07/27/2023 00:15:15 UTC
Last modified on: 08/02/2023 00:46:23 UTC