Created attachment 1103021 [details]
app.war

According to LDAP specification [1]: "Clients that follow referrals MUST ensure that they do not loop between servers. They MUST NOT repeatedly contact the same server for the same request with the same parameters.".

When EAP server is configured to use LdapExtLoginModule which uses referrals and LDAP servers contain loop then it leads to infinite cycle. It can results to java.lang.OutOfMemoryError on EAP server.


How to reproduce:
1) Start two LDAP servers which use attached server1.ldif and server2.ldif

2) Add following security domain to configuration:
<security-domain name="ldapSecurityDomain">
    <authentication>
        <login-module code="org.jboss.security.auth.spi.LdapExtLoginModule" flag="required">
            <module-option name="java.naming.factory.initial" value="com.sun.jndi.ldap.LdapCtxFactory"/>
            <module-option name="java.naming.provider.url" value="ldap://localhost:10389"/>
            <module-option name="referralUserAttributeIDToCheck" value="member"/>
            <module-option name="roleFilter" value="(|(objectClass=referral)(member={1}))"/>
            <module-option name="roleAttributeID" value="cn"/>
            <module-option name="rolesCtxDN" value="ou=Roles,dc=jboss,dc=org"/>
            <module-option name="java.naming.security.authentication" value="simple"/>
            <module-option name="bindDN" value="uid=admin,ou=system"/>
            <module-option name="bindCredential" value="secret"/>
            <module-option name="baseCtxDN" value="ou=People,dc=jboss,dc=org"/>
            <module-option name="java.naming.referral" value="throw"/>
            <module-option name="throwValidateError" value="true"/>
            <module-option name="baseFilter" value="(uid={0})"/>
        </login-module>
    </authentication>
</security-domain>

3) Deploy attached application app.war

4) Run periodically
curl -u jduke:Password1 http://localhost:8080/app/protected/printRoles?role=TheDuke&role=Admin

-> java.lang.OutOfMemoryError on EAP server


[1] http://tools.ietf.org/html/rfc4511#section-4.1.10