Check: O365-LY-000002
Microsoft Office 365 ProPlus STIG:
O365-LY-000002
(in versions v2 r11 through v1 r1)
Title
The HTTP fallback for SIP connection in Lync must be disabled. (Cat II impact)
Discussion
Prevents from HTTP being used for SIP connection in case TLS or TCP fail.
Check Content
Verify the policy value for Computer Configuration >> Administrative Templates >> Skype for Business 2016 >> Microsoft Lync Feature Policies "Disable HTTP fallback for SIP connection" 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 disablehttpconnect 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 "Disable HTTP fallback for SIP connection" to "Enabled".
Additional Identifiers
Rule ID: SV-223345r879636_rule
Vulnerability ID: V-223345
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 |