javax.servlet.ServletException: Possible CSRF attack. Refer header : - csrf

Question

I am using two WSO2 Identity Server for back-end and Apache HTTP as front-end Load Balancer
When testing the browser the URL https://lab1.xx.xx/dashboard, I see the following error at the WSO2 console log:
TID: [0] [IS] [2015-09-10 16:59:22,846] ERROR {org.wso2.carbon.tomcat.ext.valves.CompositeValve} - Could not handle request: /portal/gadgets/user_profile/js/main.js {org.wso2.carbon.tomcat.ext.valves.CompositeValve}
javax.servlet.ServletException: Possible CSRF attack. Refer header : https://lab1.xx.xx/dashboard/
at org.wso2.carbon.ui.valve.CSRFValve.validateRefererHeader(CSRFValve.java:123)
at org.wso2.carbon.ui.valve.CSRFValve.validatePatterns(CSRFValve.java:96)
at org.wso2.carbon.ui.valve.CSRFValve.invoke(CSRFValve.java:71)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.continueInvocation(CompositeValve.java:178)
at org.wso2.carbon.tomcat.ext.valves.CarbonTomcatValve$1.invoke(CarbonTomcatValve.java:47)
at org.wso2.carbon.webapp.mgt.TenantLazyLoaderValve.invoke(TenantLazyLoaderValve.java:57)
at org.wso2.carbon.tomcat.ext.valves.TomcatValveContainer.invokeValves(TomcatValveContainer.java:47)
at org.wso2.carbon.tomcat.ext.valves.CompositeValve.invoke(CompositeValve.java:141)
at org.wso2.carbon.tomcat.ext.valves.CarbonStuckThreadDetectionValve.invoke(CarbonStuckThreadDetectionValve.java:156)
at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:950)
at org.wso2.carbon.tomcat.ext.valves.CarbonContextCreatorValve.invoke(CarbonContextCreatorValve.java:52)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:116)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:408)
at org.apache.coyote.http11.AbstractHttp11Processor.process(AbstractHttp11Processor.java:1070)
at org.apache.coyote.AbstractProtocol$AbstractConnectionHandler.process(AbstractProtocol.java:611)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.doRun(NioEndpoint.java:1736)
at org.apache.tomcat.util.net.NioEndpoint$SocketProcessor.run(NioEndpoint.java:1695)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
at org.apache.tomcat.util.threads.TaskThread$WrappingRunnable.run(TaskThread.java:61)
at java.lang.Thread.run(Thread.java:745)
I applied the Patch ID: WSO2-CARBON-PATCH-4.2.0-1256 and WSO2-IS-5.0.0-SP01
<CSRFPreventionConfig>
<Enabled>true</Enabled>
<Rule>allow</Rule>
<Patterns>
<Pattern>carbon</Pattern>
<Pattern>commonauth</Pattern>
<Pattern>samlsso</Pattern>
<Pattern>authenticationendpoint</Pattern>
<Pattern>wso2</Pattern>
<Pattern>oauth2</Pattern>
<Pattern>openid</Pattern>
<Pattern>openidserver</Pattern>
<Pattern>passivests</Pattern>
<Pattern>services</Pattern>
</Patterns>
<WhiteList>
<Url>https://localhost:9443</Url>
</WhiteList>
</CSRFPreventionConfig>
Any hint how to setup a CSRF Whitelist?
Regards, Raybar

Answer 1

Change your /repository/conf/carbon.xml file and on WhiteList element add the Url element with the text https://lab1.xx.xx.
After changing that part must appears something like:
<WhiteList>
<Url>https://localhost:9443</Url>
<Url>https://lab1.xx.xx</Url>
</WhiteList>

Answer 2

I add in the whitelist, but does not work, I still see the same error log.
it might be added somewhere else?
my /repository/conf/carbon.xml file:
<CSRFPreventionConfig>
<Enabled>false</Enabled>
<Rule>allow</Rule>
<Patterns>
<Pattern>carbon</Pattern>
<Pattern>commonauth</Pattern>
<Pattern>samlsso</Pattern>
<Pattern>authenticationendpoint</Pattern>
<Pattern>wso2</Pattern>
<Pattern>oauth2</Pattern>
<Pattern>openid</Pattern>
<Pattern>openidserver</Pattern>
<Pattern>passivests</Pattern>
<Pattern>services</Pattern>
<Pattern>dashboard</Pattern>
</Patterns>
<WhiteList>
<Url>https://localhost:9443</Url>
<Url>https://ssohalab2.xx.xx:9443</Url>
<Url>https://lab1.xx.xx/dashboard/*</Url>
</WhiteList>
</CSRFPreventionConfig>
https://ssohalab2.xx.xx:9443 ---> SSO Server
https://lab1.xx.xx/dashboard/* ---> Reverse Proxy
Regards, Raybar