An Elevation of Privilege vulnerability in Active Directory affects Certification Authorities (Critical, CVE-2022-34691)

This week, on its Patch Tuesday for August 2022, Microsoft released a patch that addresses a critical vulnerability (CVE-2022-34691) in Active Directory Domain Services (AD DS).   About the vulnerability An Elevation of Privilege (EoP) vulnerability exists in Active Directory Domain Services (AD DS). The vulnerability can be exploited over the network with low complexity … Continue reading "An Elevation of Privilege vulnerability in Active Directory affects Certification Authorities (Critical, CVE-2022-34691)"

TODO: Periodically reset the password for the KRBTGT_AzureAD account when using Hybrid Cloud Trust

Microsoft offers Hybrid Cloud Trust as a way to offer people with synchronized Work or School accounts on Azure AD-joined device seamless single sign-on access to Active Directory-integrated resources. When they sign in with Windows Hello for Business (WHfB), the Active Directory-integrated functionality doesn’t prompt for username and password. How Hybrid Cloud Trust works Under … Continue reading "TODO: Periodically reset the password for the KRBTGT_AzureAD account when using Hybrid Cloud Trust"

A Critical Vulnerability in Netwrix' Auditor may lead to Active Directory and Azure AD compromise

On June 6th, 2022, Netwrix released Auditor v10.5. In this version, a remote code execution vulnerability is addressed. Since Auditor is typically executed with extensive privileges in an Active Directory environment, an attacker would be able to compromise the Active Directory forest and/or Azure AD tenant.   About Netwrix Netwrix empowers information security and governance professionals … Continue reading "A Critical Vulnerability in Netwrix' Auditor may lead to Active Directory and Azure AD compromise"

The Second Edition of the Active Directory Administration Cookbook is now available

Slightly over three years ago, my first book was published. These past few months, I've been working with Packt to write my second book: the Active Directory Administration Cookbook, Second Edition. Starting today, July 15th 2022, you can find physical copies of it on shelves at Amazon. What you'll find is 696 pages filled with … Continue reading "The Second Edition of the Active Directory Administration Cookbook is now available"

ENow Software provides the ideal basis for your Active Directory Zero Trust Journey

The world is different from five years ago. After the successful SolarWinds attack in 2020, where attackers gained access to Microsoft’s systems, Microsoft aligned itself with NIST’s approach towards a zero-trust architecture. This changes everything. In contrast to previous security models, in Microsoft’s defense in depth approach Identity and Access is the first layer of … Continue reading "ENow Software provides the ideal basis for your Active Directory Zero Trust Journey"

HOWTO: Detect NTLMv1 Authentication

Active Directory Domain Services (AD DS) offers many ways to integrate applications and services. Before Windows 2000 Server and Active Directory, in the Windows NT era when servers were beige and server racks from wood, authentication on networks was NTLM-based. Windows 2000 Server introduced Microsoft’s Kerberos implementation, but even today NTLM continues to be used. … Continue reading "HOWTO: Detect NTLMv1 Authentication"

HOWTO: Detect Apps and Services using LDAP instead of LDAPS

Active Directory Domain Services (AD DS) offers many ways to integrate applications and services. Traditionally, the Lightweight Directory Access Protocol (LDAP) was used by software developers to integrate. While Kerberos-based Integrated Windows Authentication (IWA) can also be used, LDAP has kept a certain foothold for software solutions, as it is also available on non-Windows and … Continue reading "HOWTO: Detect Apps and Services using LDAP instead of LDAPS"

An Out of Band Update resolves the Authentication issues introduced by the May 10 2022 Windows Updates

Ever since the news broke that the May 2022 Windows Updates cause Active Directory Authentication Failures in environments where certificate-based authentication is in use, many organizations have held off on installing these updates on their domain controllers. The U.S. Cybersecurity and Infrastructure Security Agency (CISA) even went as far as advising against installing the updates … Continue reading "An Out of Band Update resolves the Authentication issues introduced by the May 10 2022 Windows Updates"

The May 2022 Windows Updates may cause Active Directory Authentication Failures

The May 2022 updates for all supported versions of Windows Server may cause Active Directory authentication failures. Microsoft is investigating the issue. A workaround is available for organizations experiencing issues. The situation The Windows updates of May 10th, 2022, address several vulnerabilities on Domain Controllers, including several of the ten LDAP Remote Code Execution vulnerabilities … Continue reading "The May 2022 Windows Updates may cause Active Directory Authentication Failures"

The May 2022 Patch Tuesday addresses an LSA Spoofing vulnerability (Important, CVE-2022-26925, CVSSv3 8.1-9.8)

When looking at the May 2022 Patch Tuesday today, I noticed an update that specifically addresses an LSA Spoofing vulnerability. This vulnerability is specific to Domain Controllers (in the default configuration), so this sparked my interest in the update. About the vulnerability A spoofing vulnerability exists in the Windows Local Security Authority (LSA). This vulnerability … Continue reading "The May 2022 Patch Tuesday addresses an LSA Spoofing vulnerability (Important, CVE-2022-26925, CVSSv3 8.1-9.8)"