CVE-2021-1747 : Vulnerability Insights and Analysis

An out-of-bounds write vulnerability has been identified and fixed in various Apple products. This vulnerability could be exploited by processing maliciously crafted web content to execute arbitrary code.

Understanding CVE-2021-1747

This CVE ID refers to an out-of-bounds write vulnerability that allows attackers to execute arbitrary code by tricking users into processing specially crafted web content.

What is CVE-2021-1747?

The CVE-2021-1747 vulnerability involves improved input validation to address an out-of-bounds write issue in multiple Apple products.

The Impact of CVE-2021-1747

The impact of this vulnerability is significant as it enables threat actors to craft malicious web content and potentially execute arbitrary code on vulnerable systems.

Technical Details of CVE-2021-1747

Here are the technical details associated with CVE-2021-1747:

Vulnerability Description

The vulnerability allows for an out-of-bounds write attack, which has been mitigated with improved input validation in affected Apple products.

Affected Systems and Versions

The following Apple products are affected:

macOS Big Sur before version 11.2
macOS versions prior to Security Update 2021-001 Catalina
macOS versions earlier than Security Update 2021-001 Mojave
watchOS versions less than 7.3
tvOS versions below 14.4
iOS and iPadOS versions earlier than 14.4

Exploitation Mechanism

Exploiting this vulnerability involves processing specially crafted web content, leading to potential code execution on affected devices.

Mitigation and Prevention

To mitigate the risks associated with CVE-2021-1747, users and organizations should take the following steps:

Immediate Steps to Take

Update affected Apple products to the patched versions, including macOS Big Sur 11.2, Security Updates for Catalina and Mojave, watchOS 7.3, tvOS 14.4, iOS 14.4, and iPadOS 14.4.
Avoid visiting suspicious or untrusted websites that may host malicious content.

Long-Term Security Practices

Regularly update all software and operating systems to the latest versions to ensure the latest security patches are in place.
Implement security best practices, such as using firewalls and security software, to protect against potential threats.

Patching and Updates

Apple has released patches for the affected products. It is crucial to apply these updates promptly to safeguard against potential exploitation of this vulnerability.