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Windows Server 2019 directory service must be configured to terminate LDAP-based network connections to the directory server after five minutes of inactivity.

Overview

Finding IDVersionRule IDIA ControlsSeverity
V-205726WN19-DC-000160SV-205726r970703_ruleCCI-001133low
Description
The failure to terminate inactive network connections increases the risk of a successful attack on the directory server. The longer an established session is in progress, the more time an attacker has to hijack the session, implement a means to passively intercept data, or compromise any protections on client access. For example, if an attacker gains control of a client computer, an existing (already authenticated) session with the directory server could allow access to the directory. The lack of confidentiality protection in LDAP-based sessions increases exposure to this vulnerability.
STIGDate
Microsoft Windows Server 2019 Security Technical Implementation Guide2025-05-23

Related Frameworks

3 paths across 3 frameworks
NIST 800-531 mapping
SC-10
1.00
  • DISA · 3 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
NIST 800-1711 mapping
3.13.9
1.00
  • DISA · 3 · disa_xccdf · related
  • DISA · 2025-01-23 · disa_cci_list · equivalent
  • NIST · Rev 2 (Feb 2020, errata Jan 2021) · nist_800_171_app_d · equivalent
CCI1 mapping
CCI-001133
1.00
  • DISA · 3 · disa_xccdf · related

Details

Check Text (C-205726r970703_chk)

This applies to domain controllers. It is NA for other systems. Open an elevated "Command Prompt" (run as administrator). Enter "ntdsutil". At the "ntdsutil:" prompt, enter "LDAP policies". At the "ldap policy:" prompt, enter "connections". At the "server connections:" prompt, enter "connect to server [host-name]" (where [host-name] is the computer name of the domain controller). At the "server connections:" prompt, enter "q". At the "ldap policy:" prompt, enter "show values". If the value for MaxConnIdleTime is greater than "300" (5 minutes) or is not specified, this is a finding. Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit. Alternately, Dsquery can be used to display MaxConnIdleTime: Open "Command Prompt (Admin)". Enter the following command (on a single line). dsquery * "cn=Default Query Policy,cn=Query-Policies,cn=Directory Service, cn=Windows NT,cn=Services,cn=Configuration,dc=[forest-name]" -attr LDAPAdminLimits The quotes are required and dc=[forest-name] is the fully qualified LDAP name of the domain being reviewed (e.g., dc=disaost,dc=mil). If the results do not specify a "MaxConnIdleTime" or it has a value greater than "300" (5 minutes), this is a finding.

Fix Text (F-5991r355097_fix)

Configure the directory service to terminate LDAP-based network connections to the directory server after 5 minutes of inactivity. Open an elevated "Command prompt" (run as administrator). Enter "ntdsutil". At the "ntdsutil:" prompt, enter "LDAP policies". At the "ldap policy:" prompt, enter "connections". At the "server connections:" prompt, enter "connect to server [host-name]" (where [host-name] is the computer name of the domain controller). At the "server connections:" prompt, enter "q". At the "ldap policy:" prompt, enter "Set MaxConnIdleTime to 300". Enter "Commit Changes" to save. Enter "Show values" to verify changes. Enter "q" at the "ldap policy:" and "ntdsutil:" prompts to exit.