Synopsis
The remote web server contains a module that leaks information.
Description
The remote host is running Sun OpenSSO, or Sun Java System Access Manager as it was previously known, an enterprise-class product that provides web access management, federation, and web services security.
The version of the Login module included with Sun OpenSSO / Sun Java System Access Manager on the remote host allows an unauthenticated, remote attacker to enumerate users during the login phase using specially crafted requests.
Solution
Apply the appropriate patch referenced in the vendor advisory above.