[
https://issues.apache.org/jira/browse/HADOOP-15896?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Owen O'Malley resolved HADOOP-15896.
------------------------------------
Resolution: Not A Problem
This is working correctly. Do not attempt to change this behavior.
> Refine Kerberos based AuthenticationHandler to check proxyuser ACL
> ------------------------------------------------------------------
>
> Key: HADOOP-15896
> URL: https://issues.apache.org/jira/browse/HADOOP-15896
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Affects Versions: 2.8.0, 3.0.0-alpha1
> Reporter: Eric Yang
> Assignee: Larry McCay
> Priority: Major
>
> JWTRedirectAuthenticationHandler is based on KerberosAuthenticationHandler,
> and authentication method in KerberosAuthenticationHandler basically do this:
> {code}
> String clientPrincipal = gssContext.getSrcName().toString();
> KerberosName kerberosName = new KerberosName(clientPrincipal);
> String userName = kerberosName.getShortName();
> token = new AuthenticationToken(userName, clientPrincipal, getType());
> response.setStatus(HttpServletResponse.SC_OK);
> LOG.trace("SPNEGO completed for client principal [{}]",
> clientPrincipal);
> {code}
> It obtains the short name of the client principal and respond OK. This is
> fine for verifying end user. However, in proxy user case (knox), this
> authentication is insufficient because knox principal name is:
> knox/host1.example....@example.com . KerberosAuthenticationHandler will
> gladly confirm that knox is knox. Even if the
> knox/host1.example....@example.com is used from botnet.rogueresearchlab.tld
> host. KerberosAuthenticationHandler may not need to change, if it does not
> have plan to support proxy, and ignores instance name of kerberos principal.
> For JWTRedirectAuthenticationHandler which is designed for proxy use case.
> It should check remote host matches the clientPrincipal instance name,
> without this check, it makes Kerberos vulnerable.
--
This message was sent by Atlassian JIRA
(v7.6.3#76005)
---------------------------------------------------------------------
To unsubscribe, e-mail: common-dev-unsubscr...@hadoop.apache.org
For additional commands, e-mail: common-dev-h...@hadoop.apache.org
