| name | cis-gworkspace-3.1.3.7.2 |
| description | Ensure 'Send email over a secure TLS connection' Is Enabled |
| category | cis-gworkspace |
| version | 1.3.0 |
| author | cyberstrike-official |
| tags | ["cis","gcp","google-workspace","gmail","tls","compliance"] |
| cis_id | 3.1.3.7.2 |
| cis_benchmark | CIS Google Workspace Foundations Benchmark v1.3.0 |
| tech_stack | ["gcp","google-workspace"] |
| cwe_ids | [] |
| chains_with | [] |
| prerequisites | [] |
| severity_boost | {} |
Ensure 'Send email over a secure TLS connection' Is Enabled (Manual)
Description
The default is that Gmail always tries to send messages over a secure TLS connection. If the receiving server doesn't use TLS, Gmail still sends messages with TLS but the connection isn't secure.
This setting allows the option to require a CA-signed certificate, verify the hostname associated with the certificate, and test the TLS connection.
A padlock image will appear next to the recipient address if the message will be sent with TLS. The padlock shows only for accounts with a Google Workspace subscription that supports S/MIME encryption.
Google Workspace supports TLS versions 1.0, 1.1, 1.2, and 1.3.
Rationale
Transport Layer Security (TLS) encrypts email messages for security and privacy and prevents unauthorized access of messages when they're sent over internet connections.
Impact
This should not have an impact on the usage of Gmail.
Audit Procedure
Using Google Workspace Admin Console
- Log in to https://admin.google.com as an administrator
- Select
Apps
- Select
Google Workspace
- Select
Gmail
- Select
Compliance
- Under
Secure transport (TLS) compliance, select Configure
- Under
Email messages to affect ensure Inbound - all messages and Outbound - all messages are ON
Expected Result
Both Inbound - all messages and Outbound - all messages should be ON under Secure transport (TLS) compliance.
Remediation
Using Google Workspace Admin Console
- Log in to https://admin.google.com as an administrator
- Select
Apps
- Select
Google Workspace
- Select
Gmail
- Select
Compliance
- Select
Secure transport (TLS) compliance
- Select
Configure
- Set
Inbound - all messages and Outbound - all messages to checked
- Select
Save