STIGQter STIGQter: STIG Summary: Citrix XenDesktop 7.x Receiver Security Technical Implementation Guide Version: 1 Release: 1 Benchmark Date: 23 Aug 2018: Citrix Receiver must implement DoD-approved encryption.

DISA Rule

SV-96141r1_rule

Vulnerability Number

V-81427

Group Title

SRG-APP-000014

Rule Version

CXEN-RE-000030

Severity

CAT I

CCI(s)

Weight

10

Fix Recommendation

As an administrator, open the Citrix Receiver Group Policy Object administrative template by running gpedit.msc.

Apply the policy on a domain OU containing User Devices running Windows Receiver.
1. Launch the Citrix Receiver Group Policy Object administrative template using the Group Policy Management Console.
2. Under the Computer Configuration node, go to Administrative Templates >> Citrix Receiver >> Network routing and select the TLS and Compliance Mode Configuration policy.
3. Select "Enabled" to enable secure connections and to encrypt communication on the server. Set the following options:
- Select "Require TLS" for all connections to force Citrix Receiver for Windows to use TLS for all connections to published applications and desktops.
- From the Security Compliance Mode drop-down, select the option:
SP800-52 – Select SP800-52 for compliance with NIST SP 800-52.
- Select Full access check and CRL required.
4. Enable FIPS - Select this option to enforce the use of FIPS-approved cryptography. You must also enable the Windows security option from the operating system group policy, System Cryptography: Use FIPS-compliant algorithms for encryption, hashing, and signing. Otherwise, Citrix Receiver for Windows might fail to connect to published applications and desktops.
5. From the Allow TLS Servers drop-down, select the port number. Ensure that Citrix Receiver connects only to a specified server by using a comma-separated list. Wildcards and port numbers can be specified. For example, *.citrix.com:4433 allows connections to any server whose common name ends with .citrix.com on port 4433. The issuer of the certificate asserts the accuracy of the information in a security certificate. If Citrix Receiver does not recognize and trust the issuer, the connection is rejected.
6. From the TLS version drop-down, select "TLS 1.2".
7. TLS cipher suite - Select "Government (GOV)"
8. From the Certificate Revocation Check Policy drop-down, select the policy required by the Organizational Security Policy.

Check Contents

Verify encryption has been enabled on devices running Citrix Receiver:

Open the Citrix Receiver Group Policy Object administrative template by running gpedit.msc.

1. Launch the Citrix Receiver Group Policy Object administrative template using the Group Policy Management Console.
2. Under the Computer Configuration node, go to Administrative Templates >> Citrix Receiver >> Network routing and select the TLS and Compliance Mode Configuration policy.
3. Verify the policy is enabled.

If the policy is not enabled, this is a finding.

4. Verify the following policy options are selected:
- Verify "Require TLS for all connections" is selected.
- From the Security Compliance Mode drop-down, verify "SP800-52" is selected.
- Verify "Full access check and CRL required" is selected.
- Verify "Enable FIPS: is selected.
- From the Allow TLS Servers drop-down, verify the desired port number is entered.
- Verify "TLS 1.2" is selected.
- From the TLS cipher suite drop-down, verify "Select Government (GOV)" is selected.
- From the Certificate Revocation Check Policy drop-down, select the policy required by your Organizational Security Policy.

If any of the policy options noted above are not selected, this is a finding.

Vulnerability Number

V-81427

Documentable

False

Rule Version

CXEN-RE-000030

Severity Override Guidance

Verify encryption has been enabled on devices running Citrix Receiver:

Open the Citrix Receiver Group Policy Object administrative template by running gpedit.msc.

1. Launch the Citrix Receiver Group Policy Object administrative template using the Group Policy Management Console.
2. Under the Computer Configuration node, go to Administrative Templates >> Citrix Receiver >> Network routing and select the TLS and Compliance Mode Configuration policy.
3. Verify the policy is enabled.

If the policy is not enabled, this is a finding.

4. Verify the following policy options are selected:
- Verify "Require TLS for all connections" is selected.
- From the Security Compliance Mode drop-down, verify "SP800-52" is selected.
- Verify "Full access check and CRL required" is selected.
- Verify "Enable FIPS: is selected.
- From the Allow TLS Servers drop-down, verify the desired port number is entered.
- Verify "TLS 1.2" is selected.
- From the TLS cipher suite drop-down, verify "Select Government (GOV)" is selected.
- From the Certificate Revocation Check Policy drop-down, select the policy required by your Organizational Security Policy.

If any of the policy options noted above are not selected, this is a finding.

Check Content Reference

M

Target Key

3289

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