STIGQter STIGQter: STIG Summary: Microsoft Skype for Business 2016 Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 14 Nov 2016:

In the event a secure Session Initiation Protocol (SIP) connection fails, the connection must be restricted from resorting to the unencrypted HTTP.

DISA Rule

SV-85529r1_rule

Vulnerability Number

V-70905

Group Title

SRG-APP-000219

Rule Version

DTOO422

Severity

CAT II

CCI(s)

Weight

10

Fix Recommendation

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".

Check Contents

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".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKLM\Software\Policies\Microsoft\office\16.0\lync

Criteria: If the value disablehttpconnect is REG_DWORD = 1, this is not a finding.

Vulnerability Number

V-70905

Documentable

False

Rule Version

DTOO422

Severity Override Guidance

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".

Procedure: Use the Windows Registry Editor to navigate to the following key:

HKLM\Software\Policies\Microsoft\office\16.0\lync

Criteria: If the value disablehttpconnect is REG_DWORD = 1, this is not a finding.

Check Content Reference

M

Target Key

3123

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