CVE-2021-1773 : Security Advisory and Response

A logic issue was addressed with improved state management in Apple products, leading to a denial of service risk. This vulnerability affects iOS and iPadOS versions less than 14.4, macOS versions less than 11.2 and 7.3, and macOS Big Sur versions less than 14.4.

Understanding CVE-2021-1773

This section provides insights into the nature and impact of the CVE-2021-1773 vulnerability.

What is CVE-2021-1773?

CVE-2021-1773 is a logic issue in Apple products that could allow an attacker to cause a denial of service by processing a specially crafted image.

The Impact of CVE-2021-1773

The vulnerability could be exploited to trigger a denial of service condition by processing a maliciously crafted image on affected Apple products.

Technical Details of CVE-2021-1773

This section delves into the technical aspects of the CVE-2021-1773 vulnerability.

Vulnerability Description

The flaw arises from inadequate state management, which could be abused to disrupt the normal operation of the affected systems.

Affected Systems and Versions

iOS and iPadOS versions prior to 14.4
macOS versions prior to 11.2 and 7.3
macOS Big Sur versions prior to 14.4

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating a crafted image file, potentially leading to a denial of service on the impacted systems.

Mitigation and Prevention

In this section, we discuss the steps to mitigate and prevent the CVE-2021-1773 vulnerability.

Immediate Steps to Take

Users are advised to update their Apple devices to the patched versions immediately to prevent exploitation of this vulnerability.

Long-Term Security Practices

Implementing robust security measures such as regular software updates and security patches can help mitigate similar risks in the future.

Patching and Updates

Apple has released fixes for this vulnerability in macOS Big Sur 11.2, Security Update 2021-001 for Catalina and Mojave, watchOS 7.3, tvOS 14.4, as well as iOS 14.4 and iPadOS 14.4.