CVE-2020-0665 : What You Need to Know

An elevation of privilege vulnerability exists in Active Directory Forest trusts allowing an attacker to request delegation of a TGT for an identity from the trusted forest.

Understanding CVE-2020-0665

This CVE pertains to an elevation of privilege vulnerability in Active Directory Forest trusts.

What is CVE-2020-0665?

This vulnerability arises from a default setting in Active Directory that permits an attacker in the trusting forest to request TGT delegation for an identity from the trusted forest.

The Impact of CVE-2020-0665

The vulnerability enables attackers to elevate their privileges within Active Directory Forest trusts, potentially leading to unauthorized access to resources and sensitive data.

Technical Details of CVE-2020-0665

This section covers technical specifics of the CVE.

Vulnerability Description

An elevation of privilege flaw in Active Directory Forest trusts allows attackers to request TGT delegation for an identity from the trusted forest.

Affected Systems and Versions

The following Windows products and versions are affected:

Windows 10 Versions 1803, 1809, 1709, 1607, 7, 8.1, and RT 8.1
Windows Server 2008, 2012, 2016, 2019
Windows 10 Version 1903 and 1909

Exploitation Mechanism

By manipulating the default settings in Active Directory Forest trusts, attackers can abuse the TGT delegation process to gain elevated privileges.

Mitigation and Prevention

To address CVE-2020-0665, consider the following steps:

Immediate Steps to Take

Monitor and restrict delegation capabilities within Active Directory
Implement least privilege access controls
Apply the principle of least privilege for users and applications

Long-Term Security Practices

Regularly review and update Active Directory trust configurations
Conduct security training for IT personnel on privilege escalation threats

Patching and Updates

Install relevant security updates provided by Microsoft for affected Windows versions