CVE-2021-30720 : What You Need to Know

A logic issue was addressed with improved restrictions. This issue affects Apple products and can allow a malicious website to access restricted ports on arbitrary servers.

Understanding CVE-2021-30720

This CVE-2021-30720 vulnerability affects multiple Apple products running outdated versions of their operating systems.

What is CVE-2021-30720?

CVE-2021-30720 is a logic issue that allows a malicious website to bypass security restrictions and gain access to restricted ports on arbitrary servers.

The Impact of CVE-2021-30720

The vulnerability can potentially be exploited by threat actors to perform unauthorized activities by accessing restricted ports on servers hosting sensitive data.

Technical Details of CVE-2021-30720

Apple products including iOS, iPadOS, macOS, tvOS, watchOS, and Safari are affected by CVE-2021-30720.

Vulnerability Description

The vulnerability allows a malicious website to access restricted ports on arbitrary servers due to a logic issue in the affected Apple products.

Affected Systems and Versions

iOS and iPadOS: Versions less than 14.6
macOS: Versions less than 11.4, 14.6, 7.5, 14.1

Exploitation Mechanism

A malicious website can exploit this vulnerability to access restricted ports on servers, potentially leading to unauthorized access and data breaches.

Mitigation and Prevention

It is crucial to take immediate steps to secure your Apple devices and systems to prevent exploitation of CVE-2021-30720.

Immediate Steps to Take

Update all Apple products to the latest available versions immediately.
Avoid visiting untrusted websites or clicking on suspicious links.

Long-Term Security Practices

Regularly check for security updates and apply patches promptly to mitigate future vulnerabilities.

Patching and Updates

Apple has released patches to address CVE-2021-30720 in the following versions:

tvOS 14.6
iOS 14.6 and iPadOS 14.6
Safari 14.1.1
macOS Big Sur 11.4
watchOS 7.5