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Advisory Name      Open-Xchange defaultuser with /bin/bash
Vendor        Open-Xchange Inc.
Product        Open-Xchange
Version        < 0.8.2
Author        Cemil Degirmenci
Risk        high


o Description:
=======================

The OPEN-XCHANGE Collaboration and Integration Server Environment allows
you to store appointments, contacts, tasks, email messages, bookmarks,
documents, and many more elements, and share them with other users. It
can be accessed via any modern Web browser and multiple fat clients like
MS Outlook, Palm devices, KDE Kontact, Apple's iCAL, Konqueror, Mozilla
Calendar, any many more, based on open standards and interfaces. Third
party products can access this application over many different
interfaces such as WebDAV (XML), LDAP, iCal, an API, and HTTP/S


o Vulnerability
=======================

There is a defaultuser with username "mailadmin" and password "secret"
in Open-Xchange-LDAP.

dn: uid=mailadmin,ou=Users,ou=OxObjects,dc=example,dc=org
objectClass: top
objectClass: shadowAccount
objectClass: posixAccount
objectClass: person
objectClass: inetOrgPerson
objectClass: OXUserObject
uidNumber: 1001
homeDirectory: /home/mailadmin/
loginShell: /bin/bash
mailEnabled: OK
gidNumber: 500
mailDomain: example.org
ou: Administration
uid: mailadmin
sn: Admin
preferredLanguage: EN
mail: mailadmin@example.org
o: Example Organization
smtpServer: localhost
imapServer: localhost
alias: postmaster@example.org
alias: root@example.org
givenName: Admin
cn: Admin Admin
shadowMin: 0
shadowMax: 9999
shadowWarning: 7
shadowExpire: 0
userPassword: secret
OXAppointmentDays: 5
OXGroupID: 500
OXTaskDays: 5
OXTimeZone: Europe/Berlin

This vulnerability only appears in the opensource version of Open-Xchange

o Solution
=======================
Be aware before you activate Unix-Authentification against Open-Xchange
and change the password and loginshell of this user. Don't trust
default-installations at all.


o Reference
=======================
http://www.open-xchange.org/bugzilla/show_bug.cgi?id=2815


o Notes
=======================
The vendor was informed 2006-05-18. There was also a news on the german
newssite golem.de on 2006-05-19 (http://www.golem.de/0605/45407.html)

- --
Wavecon IT-Solutions GbR
Frankenstrasse 9 - 90762 Fuerth
Email: support@wavecon.de - Web: http://www.wavecon.de
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