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  1. JBoss Enterprise Application Platform
  2. JBEAP-2156

LdapExtLoginModule does not handle loops in referrals

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    • Icon: Bug Bug
    • Resolution: Won't Do
    • Icon: Critical Critical
    • None
    • 7.0.0.ER2 (Beta)
    • Security
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      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

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      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

      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.

      We hit this issue during certification of 3rd Party LDAP servers. This issue is not regression to EAP 6.x.

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

        1. app.war
          3 kB
          Ondrej Lukas
        2. server1.ldif
          0.7 kB
          Ondrej Lukas
        3. server2.ldif
          0.4 kB
          Ondrej Lukas

              pskopek@redhat.com Peter Skopek
              olukas Ondrej Lukas (Inactive)
              Ondrej Lukas Ondrej Lukas (Inactive)
              Ondrej Lukas Ondrej Lukas (Inactive)
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                Created:
                Updated:
                Resolved: