Merge pull request '[TESTS] verify sanitization of names to prevent XSS' (#2435) from earl-warren/forgejo:wip-xss into forgejo

Reviewed-on: https://codeberg.org/forgejo/forgejo/pulls/2435
Reviewed-by: Gusted <gusted@noreply.codeberg.org>

templates/repo/issue/view_content/comments.tmpl

@@ -619,7 +619,7 @@
 						{{else}}
 							{{$reviewerName = .Review.OriginalAuthor}}
 						{{end}}
-						{{ctx.Locale.Tr "repo.issues.review.dismissed" $reviewerName $createdStr | Safe}}
+						<span class="dismissed-message">{{ctx.Locale.Tr "repo.issues.review.dismissed" $reviewerName $createdStr | Safe}}</span>
 					</span>
 				</div>
 				{{if .Content}}

tests/integration/fixtures/TestXSSReviewDismissed/comment.yml

@@ -0,0 +1,9 @@
+-
+  id: 1000
+  type: 32 # dismiss review
+  poster_id: 2
+  issue_id: 2 # in repo_id 1
+  content: "XSS time!"
+  review_id: 1000
+  created_unix: 1700000000
+  updated_unix: 1700000000

tests/integration/fixtures/TestXSSReviewDismissed/review.yml

@@ -0,0 +1,8 @@
+-
+  id: 1000
+  type: 1
+  issue_id: 2
+  original_author: "Otto <script class='evil'>alert('Oh no!')</script>"
+  content: "XSS time!"
+  updated_unix: 1700000000
+  created_unix: 1700000000

tests/integration/xss_test.go

@@ -4,14 +4,25 @@
 package integration
 
 import (
+	"context"
+	"fmt"
 	"net/http"
+	"net/url"
+	"os"
+	"path/filepath"
 	"testing"
+	"time"
 
+	issues_model "code.gitea.io/gitea/models/issues"
 	"code.gitea.io/gitea/models/unittest"
 	user_model "code.gitea.io/gitea/models/user"
+	"code.gitea.io/gitea/modules/git"
 	"code.gitea.io/gitea/tests"
 
+	gogit "github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestXSSUserFullName(t *testing.T) {
@@ -37,3 +48,82 @@ func TestXSSUserFullName(t *testing.T) {
 		htmlDoc.doc.Find("div.content").Find(".header.text.center").Text(),
 	)
 }
+
+func TestXSSWikiLastCommitInfo(t *testing.T) {
+	onGiteaRun(t, func(t *testing.T, u *url.URL) {
+		// Prepare the environment.
+		dstPath := t.TempDir()
+		r := fmt.Sprintf("%suser2/repo1.wiki.git", u.String())
+		u, err := url.Parse(r)
+		assert.NoError(t, err)
+		u.User = url.UserPassword("user2", userPassword)
+		assert.NoError(t, git.CloneWithArgs(context.Background(), git.AllowLFSFiltersArgs(), u.String(), dstPath, git.CloneRepoOptions{}))
+
+		// Use go-git here, because using git wouldn't work, it has code to remove
+		// `<`, `>` and `\n` in user names. Even though this is permitted and
+		// wouldn't result in a error by a Git server.
+		gitRepo, err := gogit.PlainOpen(dstPath)
+		require.NoError(t, err)
+
+		w, err := gitRepo.Worktree()
+		require.NoError(t, err)
+
+		filename := filepath.Join(dstPath, "Home.md")
+		err = os.WriteFile(filename, []byte("Oh, a XSS attack?"), 0o644)
+		require.NoError(t, err)
+
+		_, err = w.Add("Home.md")
+		require.NoError(t, err)
+
+		_, err = w.Commit("Yay XSS", &gogit.CommitOptions{
+			Author: &object.Signature{
+				Name:  `Gusted<script class="evil">alert('Oh no!');</script>`,
+				Email: "valid@example.org",
+				When:  time.Date(2024, time.January, 31, 0, 0, 0, 0, time.UTC),
+			},
+		})
+		require.NoError(t, err)
+
+		// Push.
+		_, _, err = git.NewCommand(git.DefaultContext, "push").AddArguments(git.ToTrustedCmdArgs([]string{"origin", "master"})...).RunStdString(&git.RunOpts{Dir: dstPath})
+		require.NoError(t, err)
+
+		// Check on page view.
+		t.Run("Page view", func(t *testing.T) {
+			defer tests.PrintCurrentTest(t)()
+
+			req := NewRequest(t, http.MethodGet, "/user2/repo1/wiki/Home")
+			resp := MakeRequest(t, req, http.StatusOK)
+			htmlDoc := NewHTMLParser(t, resp.Body)
+
+			htmlDoc.AssertElement(t, "script.evil", false)
+			assert.Contains(t, htmlDoc.Find(".ui.sub.header").Text(), `Gusted<script class="evil">alert('Oh no!');</script> edited this page 2024-01-31`)
+		})
+
+		// Check on revisions page.
+		t.Run("Revision page", func(t *testing.T) {
+			defer tests.PrintCurrentTest(t)()
+
+			req := NewRequest(t, http.MethodGet, "/user2/repo1/wiki/Home?action=_revision")
+			resp := MakeRequest(t, req, http.StatusOK)
+			htmlDoc := NewHTMLParser(t, resp.Body)
+
+			htmlDoc.AssertElement(t, "script.evil", false)
+			assert.Contains(t, htmlDoc.Find(".ui.sub.header").Text(), `Gusted<script class="evil">alert('Oh no!');</script> edited this page 2024-01-31`)
+		})
+	})
+}
+
+func TestXSSReviewDismissed(t *testing.T) {
+	defer tests.AddFixtures("tests/integration/fixtures/TestXSSReviewDismissed/")()
+	defer tests.PrepareTestEnv(t)()
+
+	review := unittest.AssertExistsAndLoadBean(t, &issues_model.Review{ID: 1000})
+
+	req := NewRequest(t, http.MethodGet, fmt.Sprintf("/user2/repo1/pulls/%d", +review.IssueID))
+	resp := MakeRequest(t, req, http.StatusOK)
+	htmlDoc := NewHTMLParser(t, resp.Body)
+
+	htmlDoc.AssertElement(t, "script.evil", false)
+	assert.Contains(t, htmlDoc.Find("#issuecomment-1000 .dismissed-message").Text(), `dismissed Otto <script class='evil'>alert('Oh no!')</script>’s review`)
+}