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fix: limit OAuth redirects to local paths (#14585)

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- This prevents a malicious user from crafting a redirect
  URL to a nefarious site under their control.
This commit is contained in:
Jon Ayers
2024-09-10 15:58:50 +01:00
committed by GitHub
parent 2a9234e9ba
commit 328e69629c
8 changed files with 183 additions and 20 deletions
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17
coderd/coderdtest/oidctest/idp.go
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@ -479,7 +479,6 @@ func (f *FakeIDP) AttemptLogin(t testing.TB, client *codersdk.Client, idTokenCla
// This is a niche case, but it is needed for testing ConvertLoginType.
func (f *FakeIDP) LoginWithClient(t testing.TB, client *codersdk.Client, idTokenClaims jwt.MapClaims, opts ...func(r *http.Request)) (*codersdk.Client, *http.Response) {
t.Helper()
path := "/api/v2/users/oidc/callback"
if f.callbackPath != "" {
path = f.callbackPath
@ -489,13 +488,23 @@ func (f *FakeIDP) LoginWithClient(t testing.TB, client *codersdk.Client, idToken
f.SetRedirect(t, coderOauthURL.String())
cli := f.HTTPClient(client.HTTPClient)
cli.CheckRedirect = func(req *http.Request, via []*http.Request) error {
redirectFn := cli.CheckRedirect
checkRedirect := func(req *http.Request, via []*http.Request) error {
// Store the idTokenClaims to the specific state request. This ties
// the claims 1:1 with a given authentication flow.
state := req.URL.Query().Get("state")
f.stateToIDTokenClaims.Store(state, idTokenClaims)
if state := req.URL.Query().Get("state"); state != "" {
f.stateToIDTokenClaims.Store(state, idTokenClaims)
return nil
}
// This is mainly intended to prevent the _last_ redirect
// The one involving the state param is a core part of the
// OIDC flow and shouldn't be redirected.
if redirectFn != nil {
return redirectFn(req, via)
}
return nil
}
cli.CheckRedirect = checkRedirect
req, err := http.NewRequestWithContext(context.Background(), "GET", coderOauthURL.String(), nil)
require.NoError(t, err)