TMA-GITHUB-1.1.7

Ensure code owner's review is required when a change affects owned code

MediumLevel 1Automatedgithub

Description

Ensure trusted code owners are required to review and approve any code change proposal made to their respective owned areas in the code base. Configuring code owners ensures that no code, especially code which could prove malicious, will slip into the source code or configuration files of a repository. Checks the default branch: code owner review is required. Satisfied by classic branch protection or an active ruleset (rules/branches). Uses the GitHub REST/GraphQL API through gh api (read-only). The repository comes from GH_REPO or the current git checkout (gh's {owner}/{repo} resolution, GH_HOST for GitHub Enterprise Server); the organization comes from GH_ORG (default: the repository owner). Fails when gh is missing or unauthenticated (gh auth login or GH_TOKEN); organization settings and branch protection need an owner/admin token.

How it is checked

Audit method: Shell command

shell

command -v gh >/dev/null 2>&1 || exit 1
gh auth status >/dev/null 2>&1 || exit 1
info=$(gh api 'repos/{owner}/{repo}' --jq '.full_name + " " + .default_branch' 2>/dev/null) || exit 1
R=${info% *}; B=${info#* }
[ -n "$R" ] && [ -n "$B" ] || exit 1
p=$(gh api "repos/$R/branches/$B/protection" --jq '.required_pull_request_reviews.require_code_owner_reviews == true' 2>/dev/null) || p=false
s=$(gh api "repos/$R/rules/branches/$B" --jq 'any(.[]; .type == "pull_request" and .parameters.require_code_owner_review == true)' 2>/dev/null) || s=false
[ "$p" = true ] || [ "$s" = true ] && echo compliant

Expected output: compliant

How it is fixed

Fix method: Guidance or infrastructure patch

Settings > Branches (or Rules > Rulesets) for the default branch: enable Require review from Code Owners.

Properties

Operating systems: Any
Tags: githubsource-code
Reference: CIS GitHub Benchmark v1.2.0 - 1.1.7 Ensure code owner's review is required when a change affects owned code

Check this host

Run this on a machine you are allowed to audit. The scan is read-only.

shell

tmaegis scan --target github