CVE-2023-42873 - Critical Vulnerability Allows Arbitrary Code Execution with Kernel Privileges

In this long-read post, we will discuss a critical vulnerability tracked as CVE-2023-42873, which affects multiple Apple operating systems, including macOS, tvOS, iOS, and iPadOS. This vulnerability enables attackers to execute arbitrary code with kernel privileges, potentially leading to severe repercussions for affected users.

The issue was addressed by Apple with improved bounds checks in subsequent updates to the operating systems, which users should install immediately to safeguard their devices.

Vulnerability Overview

CVE identifiers (CVE-IDs) are used to uniquely identify vulnerabilities in software. CVE-2023-42873 is a critical vulnerability that allows an attacker's app to execute arbitrary code with kernel privileges. In simple terms, this means that an attacker could gain full control of the target system by exploiting this vulnerability.

Exploit Details

Although specific exploit code or techniques are not provided here to prevent potential abuse, we can discuss the general nature of the vulnerability. The issue lies in improper bounds checking within the affected operating systems, leaving them susceptible to attacks exploiting this oversight.

For instance, an attacker could craft a malicious app. When installed and executed by an unsuspecting user, the app could exploit this vulnerability to execute arbitrary code with kernel privileges, effectively granting the attacker full control over the target system. Depending on the attacker's goals, they could deploy additional malware, steal sensitive information, or cause further system damage.

Patch and Mitigation

As mentioned earlier, Apple has released updates to fix this vulnerability, improving bounds checks in affected operating systems. The issue is fixed in the following versions:

macOS Ventura 13.6.1

Users of affected devices are encouraged to update their operating systems as soon as possible. Apple users can generally update their devices through the following steps:

Follow the on-screen instructions to complete the update process.

_Confirm that the update has been installed by checking the version number in the "Software Update" settings._

Conclusion

CVE-2023-42873 is a critical vulnerability that allows attackers to execute arbitrary code with kernel privileges in various Apple operating systems. The issue has been addressed by the company via improved bounds checks in subsequent operating system updates. Users are advised to update their devices without delay to protect against potential threats exploiting this vulnerability.

Original references

To learn more about the vulnerability and related updates, you can visit the following official sources:

1. CVE-2023-42873 record on the CVE List
2. Apple Security Advisory
3. Apple Security Updates

Timeline

Published on: 02/21/2024 07:15:49 UTC
Last modified on: 08/28/2024 20:35:03 UTC