CVE-2021-1799 : Exploit Details and Defense Strategies

A port redirection issue affecting multiple Apple products has been identified and addressed by Apple. This vulnerability allows a malicious website to access restricted ports on arbitrary servers.

Understanding CVE-2021-1799

This CVE record details a port validation issue that could potentially be exploited by a malicious website to bypass port restrictions.

What is CVE-2021-1799?

CVE-2021-1799 is a vulnerability in Apple's iOS, iPadOS, macOS, tvOS, watchOS, and Safari that allows unauthorized access to restricted ports on servers.

The Impact of CVE-2021-1799

The impact of this vulnerability is significant as it enables malicious actors to exploit port redirection and gain access to restricted ports on servers hosting vulnerable Apple products.

Technical Details of CVE-2021-1799

This section provides a detailed overview of the vulnerability, affected systems, and exploitation mechanisms.

Vulnerability Description

A port redirection vulnerability was identified and fixed in macOS Big Sur 11.2, Security Updates for Catalina and Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4, iPadOS 14.4, and Safari 14.0.3. This flaw allows unauthorized access to restricted ports on servers.

Affected Systems and Versions

Apple products including iOS, iPadOS, and various versions of macOS are affected by this vulnerability. Specifically, versions below iOS 14.4, macOS 11.2, macOS 7.3, macOS 14.4, and macOS 14.0 are impacted.

Exploitation Mechanism

By exploiting this vulnerability, a malicious website can bypass port restrictions and potentially access restricted ports on targeted servers hosting affected Apple products.

Mitigation and Prevention

Protecting systems against CVE-2021-1799 requires immediate actions and long-term security practices.

Immediate Steps to Take

Users are advised to update their Apple products to the latest secure versions to mitigate the risk of exploitation.

Long-Term Security Practices

Implementing robust security measures, conducting regular security audits, and staying informed about security updates are essential for preventing such vulnerabilities.

Patching and Updates

Apple has released patches for the affected products including macOS Big Sur 11.2, Security Updates for Catalina and Mojave, tvOS 14.4, watchOS 7.3, iOS 14.4, iPadOS 14.4, and Safari 14.0.3. Users should apply these patches promptly to secure their systems.