[StepSecurity] ci: Harden GitHub Actions (#1217)

Signed-off-by: StepSecurity Bot <bot@stepsecurity.io>

.github/workflows/auto-add-issues-to-project.yml

@@ -3,6 +3,9 @@ on:
   issues:
     types:
       - opened
+permissions:
+  contents: read
+
 jobs:
   track_issue:
     runs-on: ubuntu-latest

.github/workflows/build_canary.yml

@@ -5,6 +5,9 @@ on:
     branches: [ main ]
   workflow_dispatch:
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-20.04
@@ -40,7 +43,7 @@ jobs:
 
       # https://github.com/sigstore/cosign-installer
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3
+        uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
 
       - name: Check Cosign install!
         run: cosign version

.github/workflows/build_release.yml

@@ -4,6 +4,9 @@ on:
   push:
     tags: ["v[0-9].[0-9].[0-9]"]
 
+permissions:
+  contents: read
+
 jobs:
   build:
     runs-on: ubuntu-20.04
@@ -49,7 +52,7 @@ jobs:
 
       # https://github.com/sigstore/cosign-installer
       - name: Install Cosign
-        uses: sigstore/cosign-installer@v3
+        uses: sigstore/cosign-installer@dc72c7d5c4d10cd6bcb8cf6e3fd625a9e5e537da # v3.7.0
 
       - name: Check Cosign install!
         run: cosign version

.github/workflows/e2e-tests.yaml

@@ -9,6 +9,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   e2e_tests:
     runs-on: ubuntu-latest

.github/workflows/images.yaml

@@ -7,6 +7,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   build_scaler:
     runs-on: ubuntu-latest

.github/workflows/linkinator.yaml

@@ -9,6 +9,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   linkinator:
     runs-on: ubuntu-20.04

.github/workflows/tests.yaml

@@ -9,6 +9,9 @@ concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}
   cancel-in-progress: true
 
+permissions:
+  contents: read
+
 jobs:
   validate:
     name: validate - ${{ matrix.name }}
@@ -67,13 +70,16 @@ jobs:
       run: ARCH=${{ matrix.name }} make test
 
   statics:
+    permissions:
+      contents: read  # for actions/checkout to fetch code
+      pull-requests: read  # for golangci/golangci-lint-action to fetch pull requests
     name: Static Checks
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: actions/setup-go@v5
+      - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4.2.2
+      - uses: actions/setup-go@3041bf56c941b39c61721a86cd11f3bb1338122a # v5.2.0
         with:
           go-version: "1.23"
-      - uses: golangci/golangci-lint-action@v6
+      - uses: golangci/golangci-lint-action@971e284b6050e8a5849b72094c50ab08da042db8 # v6.1.1
         with:
           version: v1.60