diff options
| -rw-r--r-- | changelog.d/7153.feature | 1 | ||||
| -rw-r--r-- | docs/sample_config.yaml | 4 | ||||
| -rw-r--r-- | synapse/config/sso.py | 15 | ||||
| -rw-r--r-- | tests/rest/client/v1/test_login.py | 9 |
4 files changed, 28 insertions, 1 deletions
diff --git a/changelog.d/7153.feature b/changelog.d/7153.feature new file mode 100644 index 0000000000..414ebe1f69 --- /dev/null +++ b/changelog.d/7153.feature @@ -0,0 +1 @@ +Always whitelist the login fallback in the SSO configuration if `public_baseurl` is set. diff --git a/docs/sample_config.yaml b/docs/sample_config.yaml index 2ff0dd05a2..07e922dc27 100644 --- a/docs/sample_config.yaml +++ b/docs/sample_config.yaml @@ -1392,6 +1392,10 @@ sso: # phishing attacks from evil.site. To avoid this, include a slash after the # hostname: "https://my.client/". # + # If public_baseurl is set, then the login fallback page (used by clients + # that don't natively support the required login flows) is whitelisted in + # addition to any URLs in this list. + # # By default, this list is empty. # #client_whitelist: diff --git a/synapse/config/sso.py b/synapse/config/sso.py index 95762689bc..ec3dca9efc 100644 --- a/synapse/config/sso.py +++ b/synapse/config/sso.py @@ -39,6 +39,17 @@ class SSOConfig(Config): self.sso_client_whitelist = sso_config.get("client_whitelist") or [] + # Attempt to also whitelist the server's login fallback, since that fallback sets + # the redirect URL to itself (so it can process the login token then return + # gracefully to the client). This would make it pointless to ask the user for + # confirmation, since the URL the confirmation page would be showing wouldn't be + # the client's. + # public_baseurl is an optional setting, so we only add the fallback's URL to the + # list if it's provided (because we can't figure out what that URL is otherwise). + if self.public_baseurl: + login_fallback_url = self.public_baseurl + "_matrix/static/client/login" + self.sso_client_whitelist.append(login_fallback_url) + def generate_config_section(self, **kwargs): return """\ # Additional settings to use with single-sign on systems such as SAML2 and CAS. @@ -54,6 +65,10 @@ class SSOConfig(Config): # phishing attacks from evil.site. To avoid this, include a slash after the # hostname: "https://my.client/". # + # If public_baseurl is set, then the login fallback page (used by clients + # that don't natively support the required login flows) is whitelisted in + # addition to any URLs in this list. + # # By default, this list is empty. # #client_whitelist: diff --git a/tests/rest/client/v1/test_login.py b/tests/rest/client/v1/test_login.py index da2c9bfa1e..aed8853d6e 100644 --- a/tests/rest/client/v1/test_login.py +++ b/tests/rest/client/v1/test_login.py @@ -350,7 +350,14 @@ class CASRedirectConfirmTestCase(unittest.HomeserverTestCase): def test_cas_redirect_whitelisted(self): """Tests that the SSO login flow serves a redirect to a whitelisted url """ - redirect_url = "https://legit-site.com/" + self._test_redirect("https://legit-site.com/") + + @override_config({"public_baseurl": "https://example.com"}) + def test_cas_redirect_login_fallback(self): + self._test_redirect("https://example.com/_matrix/static/client/login") + + def _test_redirect(self, redirect_url): + """Tests that the SSO login flow serves a redirect for the given redirect URL.""" cas_ticket_url = ( "/_matrix/client/r0/login/cas/ticket?redirectUrl=%s&ticket=ticket" % (urllib.parse.quote(redirect_url)) |