STIGQter: STIG Summary: Microsoft Outlook 2013 STIG Version: 1 Release: 13 Benchmark Date: 26 Oct 2018:

Plain Text Options for outbound email must be configured.

DISA Rule

SV-53887r2_rule

Vulnerability Number

V-17761

Group Title

DTOO228 - Plain Text Options

Rule Version

DTOO228

Severity

CAT II

CCI(s)

• CCI-002418 - The information system protects the confidentiality and/or integrity of transmitted information.

Weight

10

Fix Recommendation

Set the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2013 >> Outlook Options >> Mail format >> Internet Formatting "Plain text >> options" to "Enabled" where line length is between “30” and "132" and that NO Check is visible in the "Encode all attachments in UUENCODE format when sending a plain text message" check box option.

Check Contents

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2013 >> Outlook Options >> Mail format >> Internet Formatting "Plain text options" is set to "Enabled" where line length is between “30” and "132" and that a check does not exist in the "Encode all attachments in UUENCODE format when sending a plain text message" check box option.

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

Criteria: If the value for HKCU\Software\Policies\Microsoft\Office\15.0\common\mailsettings\PlainWrapLen is REG_DWORD = a value of between 30 and 132 (decimal) and the value for HKCU\Software\Policies\Microsoft\Office\15.0\outlook\options\mail\Message Plain Format Mime is “REG_DWORD = 1”, this is not a finding.

Vulnerability Number

V-17761

Documentable

False

Rule Version

DTOO228

Severity Override Guidance

Verify the policy value for User Configuration >> Administrative Templates >> Microsoft Outlook 2013 >> Outlook Options >> Mail format >> Internet Formatting "Plain text options" is set to "Enabled" where line length is between “30” and "132" and that a check does not exist in the "Encode all attachments in UUENCODE format when sending a plain text message" check box option.

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

Criteria: If the value for HKCU\Software\Policies\Microsoft\Office\15.0\common\mailsettings\PlainWrapLen is REG_DWORD = a value of between 30 and 132 (decimal) and the value for HKCU\Software\Policies\Microsoft\Office\15.0\outlook\options\mail\Message Plain Format Mime is “REG_DWORD = 1”, this is not a finding.

Check Content Reference

M

Responsibility

Information Assurance Officer

Target Key

2482

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