CollabNet Subversion Edge missing single login restriction

# Vuln Title: The CollabNet Subversion Edge management missing single login
# restriction
#
# Date: 28.06.2015
# Author: otr
# Software Link: https://www.open.collab.net/downloads/svnedge
# Vendor: CollabNet
# Version: 4.0.11
# Tested on: Fedora Linux
# Type: No single login restriction
#
# Risk: Low
# Status: public/unfixed
# Fixed version: -

Timeline:

2014-10-09 Flaw Discovered
2014-10-20 Vendor contacted
2014-10-21 Vendor response
2014-12-08 Vendor fix proposal
2014-12-08 Extension of embargo to 19.4.2015
2015-05-04 Extension of embargo until release of version 5.0
2015-05-18 Release of version 5.0 and public disclosure

Summary:

The web application does not restrict users to be logged in only one and does
not provide a configuration options to configure this feature for admins and/or
user accounts.

Fix proposal:

Implement a single login session restriction configuration option for the web
CollabNet web applications. Notify the user if another person has logged in
from another location.

Vendor comment:

This is the only item we decided was not worth the effort. I've not actually
seen this restriction on any webapp I've ever used.