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Fix SAML RelayState allowlist validation #4014

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Merged
duanemay merged 3 commits into from
Aug 14, 2026
Merged

Fix SAML RelayState allowlist validation #4014

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c103821
Implement SAML RelayState allowlist validation ai-assisted=yes
joemahady-comm Jul 29, 2026
e136256
Fix SAML RelayState allowlist validation
joemahady-comm Aug 7, 2026
0afc783
Fix SAML RelayState allowlist validation - Review Comments
joemahady-comm Aug 12, 2026
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9 changes: 7 additions & 2 deletions ...a/org/cloudfoundry/identity/uaa/web/UaaSavedRequestAwareAuthenticationSuccessHandler.java
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Original file line number Diff line number Diff line change
Expand Up @@ -46,8 +46,13 @@ public void onAuthenticationSuccess(HttpServletRequest request, HttpServletRespo
if (savedRequest == null) {
String relayState = UaaStringUtils.getCleanedUserControlString(request.getParameter(Saml2ParameterNames.RELAY_STATE), UaaStringUtils.EMPTY_STRING);
if (UaaStringUtils.hasText(relayState) && UaaUrlUtils.isUrl(relayState)) {
log.debug("Redirecting to relayState URI: {}", relayState);
this.getRedirectStrategy().sendRedirect(request, response, relayState);
java.util.List<String> samlRelayStateWhitelist = java.util.Optional.ofNullable(
org.cloudfoundry.identity.uaa.zone.IdentityZoneHolder.get().getConfig().getLinks().getLogout().getWhitelist()
).orElse(java.util.Collections.emptyList());
String fallbackUrl = this.getDefaultTargetUrl();
String redirectUri = UaaUrlUtils.findMatchingRedirectUri(samlRelayStateWhitelist, relayState, fallbackUrl);
log.debug("Redirecting after SAML login. requestedRelayState='{}' redirectUri='{}'", relayState, redirectUri);
this.getRedirectStrategy().sendRedirect(request, response, redirectUri);
} else {
super.onAuthenticationSuccess(request, response, authentication);
}
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26 changes: 24 additions & 2 deletions .../cloudfoundry/identity/uaa/web/UaaSavedRequestAwareAuthenticationSuccessHandlerTests.java
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Expand Up @@ -76,15 +76,37 @@ void invalidFormRedirectIsNotReturned() {
}

@Test
void onAuthenticationSuccess_noSavedRequest_hasRelayStateUrl() throws Exception {
void onAuthenticationSuccess_noSavedRequest_hasRelayStateUrl_notWhitelisted() throws Exception {
String redirectUri = "https://test.com/test2";
request.setParameter(Saml2ParameterNames.RELAY_STATE, redirectUri);

var response = new MockHttpServletResponse();
var authentication = mock(Authentication.class);
handler.onAuthenticationSuccess(request, response, authentication);

assertThat(response.getRedirectedUrl()).isEqualTo(redirectUri);
assertThat(response.getRedirectedUrl()).isEqualTo("/");
}

@Test
void onAuthenticationSuccess_noSavedRequest_hasRelayStateUrl_whitelisted() throws Exception {
String redirectUri = "https://test.com/test2";
request.setParameter(Saml2ParameterNames.RELAY_STATE, redirectUri);

org.cloudfoundry.identity.uaa.zone.IdentityZone zone = org.cloudfoundry.identity.uaa.zone.IdentityZoneHolder.get();
java.util.List<String> originalWhitelist = zone.getConfig().getLinks().getLogout().getWhitelist();
zone.getConfig().getLinks().getLogout().setWhitelist(java.util.List.of(redirectUri));
org.cloudfoundry.identity.uaa.zone.IdentityZoneHolder.set(zone);

try {
var response = new MockHttpServletResponse();
var authentication = mock(Authentication.class);
handler.onAuthenticationSuccess(request, response, authentication);

assertThat(response.getRedirectedUrl()).isEqualTo(redirectUri);
} finally {
zone.getConfig().getLinks().getLogout().setWhitelist(originalWhitelist);
org.cloudfoundry.identity.uaa.zone.IdentityZoneHolder.set(zone);
}
}
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joemahady-comm marked this conversation as resolved.

@Test
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41 changes: 41 additions & 0 deletions ...undry/identity/uaa/web/UaaSavedRequestAwareAuthenticationSuccessHandlerZonePathTests.java
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Expand Up @@ -125,4 +125,45 @@ void onAuthenticationSuccess_withSavedRequest_redirects_to_saved_url(ZoneRequest

assertThat(response.getRedirectedUrl()).isEqualTo(savedRedirectUrl);
}

@ParameterizedTest
@EnumSource(ZoneRequestPathMode.class)
void onAuthenticationSuccess_noSavedRequest_hasRelayStateUrl_notWhitelisted(ZoneRequestPathMode mode) throws Exception {
mode.setZone();
mode.applyRequestPath(request, "/login.do");
String redirectUri = "https://test.com/test2";
request.setParameter(org.springframework.security.saml2.core.Saml2ParameterNames.RELAY_STATE, redirectUri);

MockHttpServletResponse response = new MockHttpServletResponse();
Authentication authentication = mock(Authentication.class);

handler.onAuthenticationSuccess(request, response, authentication);

String expected = mode.redirectPrefix().isEmpty() ? "/" : mode.redirectPrefix() + "/";
assertThat(response.getRedirectedUrl()).isEqualTo(expected);
}

@ParameterizedTest
@EnumSource(ZoneRequestPathMode.class)
void onAuthenticationSuccess_noSavedRequest_hasRelayStateUrl_whitelisted(ZoneRequestPathMode mode) throws Exception {
mode.setZone();
mode.applyRequestPath(request, "/login.do");
String redirectUri = "https://test.com/test2";
request.setParameter(org.springframework.security.saml2.core.Saml2ParameterNames.RELAY_STATE, redirectUri);

org.cloudfoundry.identity.uaa.zone.IdentityZone zone = org.cloudfoundry.identity.uaa.zone.IdentityZoneHolder.get();
java.util.List<String> originalWhitelist = zone.getConfig().getLinks().getLogout().getWhitelist();
zone.getConfig().getLinks().getLogout().setWhitelist(java.util.List.of(redirectUri));

try {
MockHttpServletResponse response = new MockHttpServletResponse();
Authentication authentication = mock(Authentication.class);

handler.onAuthenticationSuccess(request, response, authentication);

assertThat(response.getRedirectedUrl()).isEqualTo(redirectUri);
} finally {
zone.getConfig().getLinks().getLogout().setWhitelist(originalWhitelist);
}
}
}
4 changes: 2 additions & 2 deletions uaa/src/test/java/org/cloudfoundry/identity/uaa/integration/feature/SamlLoginIT.java
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Original file line number Diff line number Diff line change
Expand Up @@ -779,7 +779,7 @@ void relayStateRedirectFromIdpInitiatedLogin() {
webDriver.findElement(By.xpath(samlServerConfig.getLoginPromptXpathExpr()));
sendCredentials(testAccounts.getUserName(), testAccounts.getPassword());
Page.assertThatUrlEventuallySatisfies(webDriver,
assertUrl -> assertUrl.startsWith("https://www.google.com"));
assertUrl -> assertUrl.startsWith(baseUrl));

webDriver.get("%s/logout.do".formatted(baseUrl));
}
Expand Down Expand Up @@ -1228,7 +1228,7 @@ void backportFrom77RelayTest() {
sendCredentials(testAccounts.getUserName(), "koala");

Page.assertThatUrlEventuallySatisfies(webDriver,
assertUrl -> assertUrl.startsWith("https://www.google.com"));
assertUrl -> assertUrl.startsWith(zoneUrl));
webDriver.get(baseUrl + "/logout.do");
webDriver.get(zoneUrl + "/logout.do");
}
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