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https://issues.apache.org/jira/browse/HIVE-9934?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14369942#comment-14369942
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Prasad Mujumdar commented on HIVE-9934:
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Hive's SaslPlainServer actually throws an exception for empty or null password.
When Hadoop implemented it's own plain Sasl server, we are potentially exposed
to this LDAP vulnerability. The sasl service registration happens via static
code block and hence we can't guarantee which Sasl server will be used.
Anycase, since this is LDAP specific behavior, it's better to guard it in LDAP
provider rather than depending on the underlying Sasl implementation.
> Vulnerability in LdapAuthenticationProviderImpl enables HiveServer2 client to
> degrade the authentication mechanism to "none", allowing authentication
> without password
> ----------------------------------------------------------------------------------------------------------------------------------------------------------------------
>
> Key: HIVE-9934
> URL: https://issues.apache.org/jira/browse/HIVE-9934
> Project: Hive
> Issue Type: Bug
> Components: Security
> Affects Versions: 1.1.0
> Reporter: Chao
> Assignee: Chao
> Fix For: 1.2.0
>
> Attachments: HIVE-9934.1.patch, HIVE-9934.2.patch, HIVE-9934.3.patch,
> HIVE-9934.3.patch
>
>
> Vulnerability in LdapAuthenticationProviderImpl enables HiveServer2 client to
> degrade the authentication mechanism to "none", allowing authentication
> without password.
> See: http://docs.oracle.com/javase/jndi/tutorial/ldap/security/simple.html
> “If you supply an empty string, an empty byte/char array, or null to the
> Context.SECURITY_CREDENTIALS environment property, then the authentication
> mechanism will be "none". This is because the LDAP requires the password to
> be nonempty for simple authentication. The protocol automatically converts
> the authentication to "none" if a password is not supplied.”
>
> Since the LdapAuthenticationProviderImpl.Authenticate method is relying on a
> NamingException being thrown during creation of initial context, it does not
> fail when the context result is an “unauthenticated” positive response from
> the LDAP server. The end result is, one can authenticate with HiveServer2
> using the LdapAuthenticationProviderImpl with only a user name and an empty
> password.
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