LDAP channel binding and LDAP signing provide ways to increase the security for communications between LDAP clients and Active Directory domain controllers.

Find answers to frequently asked questions about the changes to Lightweight Directory Access Protocol (LDAP). To learn more, go to ADV190023. Contents. What resources should I read to prepare to successfully deploy LDAP Channel Binding and LDAP signing? What issues do you foresee with enforcing LDAP signing?

Describes the LdapEnforceChannelBinding registry setting that is used to enable the fix decribed in CVE-2017-8563.

Internet directory services, also known as LDAP services, are used to find e-mail addresses that are not in your local Outlook contacts. Directory services search directories on other servers to look up names and other information that can then be viewed in Outlook.

You notice that Lightweight Directory Access Protocol (LDAP) or Kerberos responses from the domain controller are delayed by 2 to 5 seconds. When the issue occurs, the Lsass.exe process CPU usage is low (even lower than usual). Around the same time (but up to a 4-hour offset), you may receive Netlogon warning event 5807.

Microsoft Challenge Handshake Authentication Protocol version 2 (MS-CHAP v2) is a password-based authentication protocol which is widely used as an authentication method in PPTP-based (Point to Point Tunneling Protocol) VPNs.

The Lightweight Directory Access Protocol (LDAP) directory service is hosted on many nodes behind a Network Load Balancing (NLB) server. The nodes are protected by Secure Socket Layer (SSL) and are configured to use an alias name.

CVE-2022-34691, CVE-2022-26931 and CVE-2022-26923 address an elevation of privilege vulnerability that can occur when the Kerberos Key Distribution Center (KDC) is servicing a certificate-based authentication request.

The update addresses this vulnerability by incorporating support for Extended Protection for Authentication security feature, which allows the LDAP server to detect and block such forwarded authentication requests once enabled. To learn more about the vulnerability, see CVE-2017-8563.

LDAP Paged Queries with subordinate referrals are not chased properly - Microsoft Support. Symptoms. You have an application that searches the Active Directory with paged searches using ldap_search_ext or ldap_search_ext_s, and it is set to chase referrals.