Check: O365-LY-000001
Microsoft Office 365 ProPlus STIG:
O365-LY-000001
(in versions v2 r11 through v1 r1)
Title
The SIP security mode in Lync must be enabled. (Cat II impact)
Discussion
When Lync connects to the server, it supports various authentication mechanisms. This policy allows the user to specify whether Digest and Basic authentication are supported. Disabled (default): NTLM/Kerberos/TLS-DSK/Digest/Basic Enabled: Authentication mechanisms: NTLM/Kerberos/TLS-DSK Gal Download: Requires HTTPS if user is not logged in as an internal user.
Check Content
Verify the policy value for Computer Configuration >> Administrative Templates >> Skype for Business 2016 >> Microsoft Lync Feature Policies "Configure SIP security mode" is set to "Enabled". Use the Windows Registry Editor to navigate to the following key: HKLM\Software\Policies\Microsoft\office\16.0\lync If the value enablesiphighsecuritymode is REG_DWORD = 1, this is not a finding.
Fix Text
Set the policy value for Computer Configuration >> Administrative Templates >> Skype for Business 2016 >> Microsoft Lync Feature Policies "Configure SIP security mode" to "Enabled".
Additional Identifiers
Rule ID: SV-223344r879636_rule
Vulnerability ID: V-223344
Group Title: SRG-APP-000219
Expert Comments
CCIs
Number | Definition |
---|---|
CCI-001184 |
The information system protects the authenticity of communications sessions. |
Controls
Number | Title |
---|---|
SC-23 |
Session Authenticity |