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https://issues.apache.org/jira/browse/HADOOP-15162?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16318749#comment-16318749
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Eric Yang commented on HADOOP-15162:
------------------------------------
[~daryn] {quote}
Are you writing your own custom http server and authentication filter?
{quote}
No. This JIRA serves the purpose to provide information for less experienced
developer to understand proxy ACL must be verified to enable perimeter
security. Code written as:
{code}
proxyUser = UserGroupInformation.getLoginUser();
ugi = UserGroupInformation
.createProxyUser(remoteUser, proxyUser);
{code}
Without using UGI.createRemoteUser(remoteUser) is equally good. There is no
need of isSecurityEnabled() check, and there is no need of explicitly call
UGI.createRemoteUser(remoteUser). User only get to shoot themselves in the
foot, if {{hadoop.http.authentication.simple.anonymous.allowed}} is
misconfigured which allow anyone to impersonate as someone else. I would
propose to deprecate createRemoteUser(remoteUser) API because it creates
confusion on how code should be written.
> UserGroupInformation.createRemoteUser hardcode authentication method to SIMPLE
> ------------------------------------------------------------------------------
>
> Key: HADOOP-15162
> URL: https://issues.apache.org/jira/browse/HADOOP-15162
> Project: Hadoop Common
> Issue Type: Bug
> Components: security
> Reporter: Eric Yang
>
> {{UserGroupInformation.createRemoteUser(String user)}} is hard coded
> Authentication method to SIMPLE by HADOOP-10683. This by passed proxyuser
> ACL check, isSecurityEnabled check, and allow caller to impersonate as
> anyone. This method could be abused in the main code base, which can cause
> part of Hadoop to become insecure without proxyuser check for both SIMPLE or
> Kerberos enabled environment.
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