A vulnerability exists in iPlanet Web Server Enterprise Edition and Netscape Enterprise Server that allows an attacker to make repeated authentication attempts if a server is configured to use HTTP basic authentication. While the risk is not greater than any other brute force attack using HTTP basic authentication, this vulnerability may represent an unexpected avenue of attack.
ProCheckup has reported a vulnerability in iPlanet Web Server, Enterprise Edition and Netscape Enterprise Server running on Windows NT based operating systems. The iPlanet and NES servers provide a feature called Web Publisher. According to NES documentation:
Netscape Enterprise Server 4.0 clients can use Web Publisher to collaborate on projects by directly accessing, editing, and managing file on remote servers. Web Publisher provides sophisticated features for server clients, such as file management, editing and publishing, and access control.
An unauthenticated remote attacker may make repeated attempts to guess valid user credentials.
Disable Web Publishing
Another method for disabling Web Publisher is to use a Netscape Server Application Programming Interface (NSAPI) Server Application Functions (SAF):
Filter HTTP TrafficIt may be possible to use an application layer filter to detect and block HTTP requests containing the ?wp-force-auth command.
The CERT Coordination Center thanks ProCheckup for information used in this document.
This document was written by Art Manion.
|Date First Published:||2002-01-08|
|Date Last Updated:||2002-01-08 18:36 UTC|