CVE-2020-1118 : Security Advisory and Response

A denial of service vulnerability exists in the Windows implementation of Transport Layer Security (TLS) when it improperly handles certain key exchanges, aka 'Microsoft Windows Transport Layer Security Denial of Service Vulnerability'.

Understanding CVE-2020-1118

This CVE pertains to a denial of service vulnerability in the Windows TLS implementation.

What is CVE-2020-1118?

This CVE describes a flaw in how Windows handles certain key exchanges within its TLS implementation, leading to a denial of service vulnerability.

The Impact of CVE-2020-1118

The vulnerability can be exploited by an attacker to disrupt TLS communications, potentially leading to service disruptions on affected systems.

Technical Details of CVE-2020-1118

This section covers the technical aspects of the vulnerability.

Vulnerability Description

The vulnerability in Windows TLS implementation allows for denial of service attacks by mishandling key exchanges.

Affected Systems and Versions

The following Microsoft products and versions are affected:

Windows 10 Version 1803, 1809, 1709
Windows Server 1803, 2019
Windows 10 Version 1909, 1903

Exploitation Mechanism

Attackers can exploit this vulnerability by manipulating key exchanges in TLS connections, causing service interruptions.

Mitigation and Prevention

Steps to address and prevent exploitation of the vulnerability.

Immediate Steps to Take

Apply security patches provided by Microsoft promptly.
Monitor network traffic for any suspicious activity related to TLS connections.

Long-Term Security Practices

Stay updated on security advisories from Microsoft and other relevant sources.
Implement network segmentation and access control measures to limit the impact of potential attacks.

Patching and Updates

Regularly check for updates and apply patches from Microsoft to safeguard systems against known vulnerabilities.