Administrative Endpoints & Monitoring Authentication with LDAP fails in CAS 6.x

[Doug C]

I am getting the following when attempting to configure LDAP authentication to the CAS and Spring endpoints.

2019-04-25 17:51:08,236 ERROR [org.apereo.cas.web.security.authentication.MonitorEndpointLdapAuthenticationProvider] - <null>

java.lang.NullPointerException: null

        at org.apereo.cas.util.LdapUtils.lambda$newLdaptiveSearchFilter$3(LdapUtils.java:530) ~[cas-server-support-ldap-core-6.0.3.jar!/:6.0.3]

        at java.util.stream.Streams$RangeIntSpliterator.forEachRemaining(Streams.java:104) ~[?:?]

        at java.util.stream.IntPipeline$Head.forEach(IntPipeline.java:593) ~[?:?]

        at org.apereo.cas.util.LdapUtils.newLdaptiveSearchFilter(LdapUtils.java:529) ~[cas-server-support-ldap-core-6.0.3.jar!/:6.0.3]

        at org.apereo.cas.authorization.BaseUseAttributesAuthorizationGenerator.generate(BaseUseAttributesAuthorizationGenerator.java:69) ~[cas-server-support-ldap-core-6.0.3.jar!/:6.0.3]

        at org.apereo.cas.web.security.authentication.MonitorEndpointLdapAuthenticationProvider.authenticate(MonitorEndpointLdapAuthenticationProvider.java:72) ~[cas-server-webapp-config-6.0.3.jar!/:6.0.3]

        at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:175) ~[spring-security-core-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.authentication.ProviderManager.authenticate(ProviderManager.java:200) ~[spring-security-core-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.authentication.UsernamePasswordAuthenticationFilter.attemptAuthentication(UsernamePasswordAuthenticationFilter.java:94) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.authentication.AbstractAuthenticationProcessingFilter.doFilter(AbstractAuthenticationProcessingFilter.java:212) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.context.SecurityContextPersistenceFilter.doFilter(SecurityContextPersistenceFilter.java:105) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.context.request.async.WebAsyncManagerIntegrationFilter.doFilterInternal(WebAsyncManagerIntegrationFilter.java:56) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.access.channel.ChannelProcessingFilter.doFilter(ChannelProcessingFilter.java:157) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.FilterChainProxy$VirtualFilterChain.doFilter(FilterChainProxy.java:334) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.FilterChainProxy.doFilterInternal(FilterChainProxy.java:215) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.security.web.FilterChainProxy.doFilter(FilterChainProxy.java:178) ~[spring-security-web-5.1.5.RELEASE.jar!/:5.1.5.RELEASE]

        at org.springframework.web.filter.DelegatingFilterProxy.invokeDelegate(DelegatingFilterProxy.java:357) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.web.filter.DelegatingFilterProxy.doFilter(DelegatingFilterProxy.java:270) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.springframework.web.filter.RequestContextFilter.doFilterInternal(RequestContextFilter.java:99) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.springframework.web.filter.FormContentFilter.doFilterInternal(FormContentFilter.java:92) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.springframework.web.filter.HiddenHttpMethodFilter.doFilterInternal(HiddenHttpMethodFilter.java:93) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.filterAndRecordMetrics(WebMvcMetricsFilter.java:117) ~[spring-boot-actuator-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]

        at org.springframework.boot.actuate.metrics.web.servlet.WebMvcMetricsFilter.doFilterInternal(WebMvcMetricsFilter.java:106) ~[spring-boot-actuator-2.1.2.RELEASE.jar!/:2.1.2.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apereo.cas.logging.web.ThreadContextMDCServletFilter.doFilter(ThreadContextMDCServletFilter.java:98) ~[cas-server-core-logging-6.0.3.jar!/:6.0.3]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.springframework.web.filter.CharacterEncodingFilter.doFilterInternal(CharacterEncodingFilter.java:200) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.springframework.web.filter.OncePerRequestFilter.doFilter(OncePerRequestFilter.java:107) ~[spring-web-5.1.6.RELEASE.jar!/:5.1.6.RELEASE]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apereo.inspektr.common.web.ClientInfoThreadLocalFilter.doFilter(ClientInfoThreadLocalFilter.java:66) ~[inspektr-common-1.8.4.GA.jar!/:1.8.4.GA]

        at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:193) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:166) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:200) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:96) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.authenticator.AuthenticatorBase.invoke(AuthenticatorBase.java:490) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:139) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:92) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:74) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.valves.AbstractAccessLogValve.invoke(AbstractAccessLogValve.java:678) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.valves.RemoteIpValve.invoke(RemoteIpValve.java:679) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:343) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.coyote.http11.Http11Processor.service(Http11Processor.java:408) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.coyote.AbstractProcessorLight.process(AbstractProcessorLight.java:66) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.coyote.AbstractProtocol$ConnectionHandler.process(AbstractProtocol.java:834) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1415) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at org.apache.tomcat.util.net.SocketProcessorBase.run(SocketProcessorBase.java:49) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128) ~[?:?]

        at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628) ~[?:?]

        at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61) ~[tomcat-embed-core-9.0.17.jar!/:9.0.17]

        at java.lang.Thread.run(Thread.java:835) [?:?]

I have added the following dependencies to my build.gradle in the cas-overlay-template:

    compile "com.unboundid:unboundid-ldapsdk:4.0.10"

    compile 'org.springframework.security:spring-security-core:5.1.5.RELEASE'

    compile 'org.springframework.security:spring-security-cas:5.1.5.RELEASE'

    compile 'org.springframework.security:spring-security-web:5.1.5.RELEASE'

    compile 'org.springframework.security:spring-security-config:5.1.5.RELEASE'

    compile 'org.springframework.security:spring-security-ldap:5.1.5.RELEASE'

    compile 'org.springframework.ldap:spring-ldap-core:2.3.2.RELEASE'

I have the following configuration in cas.properties:

management.endpoints.web.exposure.include=*

management.endpoints.enabled-by-default=true

cas.monitor.endpoints.endpoint.defaults.access=AUTHENTICATED

cas.monitor.endpoints.ldap.providerClass=org.ldaptive.provider.unboundid.UnboundIDProvider

cas.monitor.endpoints.ldap.type=AUTHENTICATED

cas.monitor.endpoints.ldap.ldapUrl=ldaps://xxx.yyy.zzz/

cas.monitor.endpoints.ldap.useSsl=true

cas.monitor.endpoints.ldap.useStartTls=false

cas.monitor.endpoints.ldap.connectTimeout=5000

cas.monitor.endpoints.ldap.baseDn=ou=OU,dc=YYY,dc=ZZZ

cas.monitor.endpoints.ldap.bindDn=cn=ADMIN,ou=OU,dc=YYY,dc=ZZZ

cas.monitor.endpoints.ldap.bindCredential=xxxxxxxxx

cas.monitor.endpoints.ldap.searchFilter=(sAMAccountName={user})

cas.monitor.endpoints.ldap.subtreeSearch=true

I resolved a similar issue by following the advice given in https://groups.google.com/a/apereo.org/d/msg/cas-user/tC6qQO9zGRk/NrlucUjDHQAJ but that does not seem to be helping for cas.monitor.endpoints.ldap like it did for cas.authn.ldap.

This seems like a bug but I am not sure where and I am not sure how to troubleshoot it given my limited experience in java.  Appreciate any answers others might be able to give.

Thanks!

Doug