A couple of weeks ago, I took interest in Azure Multi-factor Authentication (MFA) and wrote a series on 4Sysops, detailing the Azure MFA Service and the on-premises Multi-Factor Authentication Server: Azure Multi-Factor Authentication – Part 1: Introduction Azure Multi-Factor Authentication – Part 2: Components Azure Multi-Factor Authentication – Part 3: Configuring Azure Multi-Factor Authentication – … Continue reading "Choosing the right Azure MFA authentication methods"
As you might recall, Microsoft offered a solution to systems administrators to set the local administrator password on domain-joined devices using Group Policy Preferences, but ended the solution, almost a year ago, when the encoding mechanism was decoded and an attack was created towards this vulnerability (CVE-2014-1812). Introducing LAPS Yesterday, Microsoft introduced version 6 … Continue reading "Security Thoughts: Microsoft Local Administrator Password Solution (LAPS, KB3062591)"
While this has proven to be n interesting month with the Factoring RSA Export Keys (FREAK) technique affecting a plethora of Operating Systems, Microsoft has also issued an update to address a privately reported vulnerability in NETLOGON. About the vulnerability A spoofing vulnerability exists in NETLOGON that is caused when the NETLOGON service improperly … Continue reading "Security Thoughts: Vulnerability in NETLOGON cloud allow spoofing (MS15-027, CVE-2015-0005)"
In recent days, a new attack vector, called the FREAK technique, that facilitates SSL/TLS Man-in-the-Middle (MitM) attacks was in the news. Microsoft has confirmed that its implementations of SChannel in Windows and Windows Server are also vulnerable to this attack method and has released updates for all its supported Operating Systems. About FREAK On … Continue reading "Security Thoughts: Vulnerability in SChannel allows security bypassing (Important, FREAK, MS15-031, CVE-2015-1637)"
Windows 8.1 and Windows Server 2012 R2 introduced an awesome new feature, called Include command line in process creation events, a Group Policy setting that expands the Audit Process Creation policy so events in Event Viewer (eventvwr.msc) include the actual commands issued. Last week, Microsoft introduced an update to Windows 7, Windows 8, Windows Server … Continue reading "Security Thoughts: Include command line in process creation events"
For its February 2015 Patch Tuesday on Tuesday February 10, Microsoft has released two security bulletin to address issues in Group Policy that would allow an attacker using a Man-in-the-middle (MitM) approach to bypass security policies, by forging packets sent by Domain Controllers. The situation In many organizations, Group Policies are used to centrally … Continue reading "Vulnerabilities in Group Policy could allow security policy bypassing (MS15-011, MS15-014, CVE-2015-0008, CVE-2015-0009)"
Previously, we’ve looked at the WorkPlace Join functionality in Active Directory Federation Services (AD FS) in Windows Server 2012 R2 (and up) and the accompanying Registered Device objects in Active Directory Domain Services (AD DS). When WorkPlace Join is enabled for a networking environment, by default anyone has the right to WorkPlace Join devices, by … Continue reading "Granularly permitting or denying the right to WorkPlace Join devices based on group membership"
Last week, Microsoft released Security Bulletin MS04-025, including guidance and an update that resolves a publicly disclosed vulnerability in Microsoft Windows. The vulnerability could allow elevation of privilege if Active Directory Group Policy preferences are used to distribute passwords across the domain – a practice that could allow an attacker to retrieve and decrypt the … Continue reading "Security Thoughts: Passwords in Group Policy Preferences (CVE-2014-1812)"
This week, the Internet was abuzz with HeartBleed,a vulnerability in OpenSSL. This meant many secure websites and webservices, protected by OpenSSL, suddenly became a security risk and OpenSSL (and open source software, in general) suddenly became a lot less trustworthy. About HeartBleed The HeartBleed bug is a serious vulnerability in the popular OpenSSL cryptographic software … Continue reading "Implications of the HeartBleed vulnerability on Single Sign-On and Federation implementations"