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cis-tomcat101-6.3

DevOps & Security
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Ensure scheme is set accurately

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6.3 Ensure scheme is set accurately (Automated)

Profile Applicability

• Level 1

Description

The scheme attribute is used to indicate to callers of request.getScheme() which scheme is in use by the Connector. Ensure the scheme attribute is set to http for Connectors operating over HTTP. Ensure the scheme attribute is set to https for Connectors operating over HTTPS.

Rationale

Maintaining parity between the scheme in use by the Connector and advertised by request.getScheme() will ensure applications built on Tomcat have an accurate depiction of the context and security guarantees provided to them.

Audit Procedure

Review the server.xml to ensure the Connector's scheme attribute is set to http for Connectors operating over HTTP. Also ensure the Connector's scheme attribute is set to https for Connectors operating over HTTPS.

Remediation

In server.xml, set the Connector's scheme attribute to http for Connectors operating over HTTP. Set the Connector's scheme attribute to https for Connectors operating over HTTPS.

<Connector
  …
  scheme="https"
  …
/>

Default Value

The scheme attribute is set to http.

References

  1. https://tomcat.apache.org/tomcat-9.0-doc/ssl-howto.html
  2. https://tomcat.apache.org/tomcat-9.0-doc/config/http.html

CIS Controls

Controls Version: v8

Control: 16.7 Use Standard Hardening Configuration Templates for Application Infrastructure

Use standard, industry-recommended hardening configuration templates for application infrastructure components. This includes underlying servers, databases, and web servers, and applies to cloud containers, Platform as a Service (PaaS) components, and SaaS components. Do not allow in-house developed software to weaken configuration hardening.

IG 1: IG 2: • IG 3: •

Controls Version: v7

Control: 9.2 Ensure Only Approved Ports, Protocols and Services Are Running

Ensure that only network ports, protocols, and services listening on a system with validated business needs, are running on each system.

IG 1: IG 2: • IG 3: •

Profile

Level 1