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https://issues.apache.org/jira/browse/DERBY-866?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13217263#comment-13217263
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Rick Hillegas commented on DERBY-866:
-------------------------------------
Thanks, Knut. I am trying to puzzle through what we should do here. If I
correctly understand your comments on DERBY-5539, the security vulnerability is
this:
1) It takes a different amount of time to reject a bad password if the username
itself is invalid.
2) This gives blackhats information about which usernames are good.
We could use some default hashing algorithm to slow down credentials failure
when NATIVE authentication discovers that the username itself is invalid. When
the default algorithm changes or otherwise diverges from the algorithm stored
for most users in SYSUSERS.HASHINGSCHEME, then failure timings will again leak
information about what usernames are legal. Information will leak until
existing users change their passwords so that they enjoy the new, stronger
default algorithm. That's a smaller problem, but one which stumps me. I am
inclined to keep this simple and not worry about the smaller vulnerability.
> Derby User Management Enhancements
> ----------------------------------
>
> Key: DERBY-866
> URL: https://issues.apache.org/jira/browse/DERBY-866
> Project: Derby
> Issue Type: Improvement
> Components: Services
> Affects Versions: 10.2.1.6
> Reporter: Francois Orsini
> Assignee: Rick Hillegas
> Attachments: Derby_User_Enhancement.html,
> Derby_User_Enhancement_v1.1.html, DummyAuthenticator.java,
> UserManagement.html, UserManagement.html, UserManagement.html,
> UserManagement.html, UserManagement.html, UserManagement.html,
> derby-866-01-aa-sysusers.diff, derby-866-01-ab-sysusers.diff,
> derby-866-02-ag-createDropUser.diff,
> derby-866-03-aa-resetModifyPassword.diff,
> derby-866-03-ab-resetModifyPassword.diff, derby-866-04-aa-fixRolesTest.diff,
> derby-866-05-aa-grantRevoke.diff, derby-866-06-aa-upgradeFrom10.1.diff,
> derby-866-07-aa-removeSQLPassword.diff, derby-866-08-aa-passwordHasher.diff,
> derby-866-08-ab-passwordHasher.diff, derby-866-08-ad-passwordHasher.diff,
> derby-866-09-ad-nativeAuthenticationService.diff,
> derby-866-09-ae-nativeAuthenticationServiceWithTests.diff,
> derby-866-10-ac-propChanging.diff, derby-866-11-aa-upgradeTest.diff,
> derby-866-12-ac-passwordExpiration.diff,
> derby-866-13-ab-systemWideOperationTests.diff,
> derby-866-14-ac-badNativeSpec.diff,
> derby-866-15-ae-dbInJarFileOrOnClasspath.diff,
> derby-866-16-aa-credDBViaSubprotocol.diff,
> derby-866-17-aa-grantRevokeNative.diff,
> derby-866-18-aa-encryptedCredentialsDB.diff, dummyCredentials.properties
>
>
> Proposal to enhance Derby's Built-In DDL User Management. (See proposal spec
> attached to the JIRA).
> Abstract:
> This feature aims at improving the way BUILT-IN users are managed in Derby by
> providing a more intuitive and familiar DDL interface. Currently (in
> 10.1.2.1), Built-In users can be defined at the system and/or database level.
> Users created at the system level can be defined via JVM or/and Derby system
> properties in the derby.properties file. Built-in users created at the
> database level are defined via a call to a Derby system procedure
> (SYSCS_UTIL.SYSCS_SET_DATABASE_PROPERTY) which sets a database property.
> Defining a user at the system level is very convenient and practical during
> the development phase (EOD) of an application - However, the user's password
> is not encrypted and consequently appears in clear in the derby.properties
> file. Hence, for an application going into production, whether it is embedded
> or not, it is preferable to create users at the database level where the
> password is encrypted.
> There is no real ANSI SQL standard for managing users in SQL but by providing
> a more intuitive and known interface, it will ease Built-In User management
> at the database level as well as Derby's adoption.
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