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ownCloud 3.0.0 Cross Site Scripting

ownCloud 3.0.0 Cross Site Scripting
Posted Apr 18, 2012
Authored by Tobias Glemser

ownCloud version 3.0.0 suffers from cross site scripting and open redirection vulnerabilities.

tags | exploit, vulnerability, xss
advisories | CVE-2012-2269, CVE-2012-2270
MD5 | c91fd67183b27813dac00c983a1baeb5

ownCloud 3.0.0 Cross Site Scripting

Change Mirror Download
TC-SA-2012-01: Multiple web-vulnerabilities in ownCloud 3.0.0

Published: 2012/04/18
Version 1.0

Affected products:
ownCloud version 3.0.0 (others not tested)
http://owncloud.org

References:
TC-SA-2012-01 www.tele-consulting.com/advisories/TC-SA-2012-01.txt
(used for updates)
CVE-2012-2269 - XSS in ownCloud 3.0.0
CVE-2012-2270 - Open Redirect in ownCloud 3.0.0

Summary:
"ownCloud gives you easy and universal access to all of your files.
It also provides a platform to easily view, sync and share your
contacts, calendars, bookmarks and files across all your devices.
ownCloud 3 brings loads of new features and hundreds of fixes"

Vulnerable Scripts:
stored XSS:
- /apps/contacts/ajax/addcard.php (any input field)
- /apps/contacts/ajax/addproperty.php (parameter)
- /apps/contacts/ajax/createaddressbook (name)

reflected XSS:
- /files/download.php (file)
- /files/index.php (name, user, redirect_url)

open redirect after login:
- Login Page

Examples:
stored XSS:
- add a new contact and enter <script>alert("Help Me")</script> in
any field, save the contact
- add a new date in calendar with name <script>alert("Help
Me")</script>"

reflected XSS (un-authenticated):
-
http://$domain/owncloud/index.php?redirect_url=1"><script>alert("Help
Me")</script><l=" (must not be logged in)

open redirect after login:
-
http://$domain/owncloud/index.php?redirect_url=http%3a//www.boeserangreife
r.de/

Possible solutions:
- update to OwnCloud 3.0.2

Disclosure Timeline:
2012/02/01 vendor contacted via #owncloud on freenode IRC, got E-Mail
2012/02/01 vendor contacted via E-Mail
2012/02/02 vendor response
2012/04/16 asked vendor for status updates
2012/04/16 vendor status: patched with version 3.0.2
2012/04/18 public disclosure

Credits:
Tobias Glemser (tglemser@tele-consulting.com)
Tele-Consulting security networking training GmbH, Germany
www.tele-consulting.com

Disclaimer:
All information is provided without warranty. The intent is to
provide information to secure infrastructure and/or systems, not
to be able to attack or damage. Therefore Tele-Consulting shall
not be liable for any direct or indirect damages that might be
caused by using this information.

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