full-disclosure - Re: WebCalendar User Account Enumeration Weakness

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Date: Fri May  5 09:54:27 2006
From: david.maciejak at gmail.com (David Maciejak)
Subject: Re: WebCalendar User Account Enumeration Weakness

According to WebCalendar lead developer, this will be corrected in
upcoming  developer release v1.1.

david

> WebCalendar is a PHP-based calendar application that can be configured
> as a single-user calendar, a multi-user calendar for groups of users,
> or as an event calendar viewable by visitors.
> See project homepage for details: http://www.k5n.us/webcalendar.php
>
> Description:
>
> The problem is that different error messages are returned depending
> on whether an unsuccessful login attempt is performed with a valid or
> invalid username in the login page.
>
> Error message extract from 'includes/user.php' can be
> "Invalid login"
> "Invalid login: incorrect password"
> "Invalid login: no such user"
>
> The weakness has been confirmed in version 1.0.1, 1.0.2, 1.0.3.
> Other versions may also be affected.
>
>
> David Maciejak
>