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 PHProjekt 5.2.0 - CSRF vulnerability

Wednesday, 28 March 2007

n.runs AG
http://www.nruns.com/ security at nruns.com
n.runs-SA-2007.005 14-Mar-2007
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Vendor: Mayflower GmbH, http://www.mayflower.de
Affected Products: PHProjekt 5.2.0
Vulnerability: Cross Site Request Forgery
Risk: HIGH

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Vendor communication:

  2006/12/31 initial notification of Mayflower
  2007/01/02 Mayflower Response
  2007/01/02 PGP keys exchange
  2007/01/02 PoCs sent to Mayflower
  2007/01/11 Mayflower confirmed the bugs
  2007/01/30 Mayflower fixed the bugs and sends RC1
  2007/01/30 n.runs informs Mayflower about a persisting XSS vulnerability
  2007/02/02 Mayflower confirmed the bug
  2007/02/08 Mayflower fixed the bugs and sends RC2
  2007/02/12 n.runs informs Mayflower about a persisting XSS vulnerability
  2007/02/15 Mayflower confirmed the bug
  2007/02/20 Mayflower fixed the bug and sends RC3
  2007/02/21 n.runs verifies RC3 and reported a possible flaw within the new XSS protection library
  2007/03/14 PHProjekt 5.2.1 available
  2007/03/14 Coordinated disclosure

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Overview:

Quoting http://www.phprojekt.com/features.php?&newlang=eng "PHProjekt is a modular application for the coordination of group activities and to share informations and document via the web. Components of PHProjekt: Group calendar, project management, time card system, file management, contact manager mail client and many other modules. PHProjekt supports many protocols like ldap, xml/soap and webdav and is available for 38 languages and 9 databases."

Description:

In detail, the following flaws were determined during a quick source code review for the modules Projects, Contacts, Helpdesk, Notes, Search and Mail.
During the validation the php.ini setting "magic_quotes_gpc" was deactivated.

PHProjekt using an internal a CSRF protection (see function check_csrftoken() in lib/lib.inc.php).

By calling this function the return value is always true. Due to incorrect output validation in many modules, such as Mail or Filemanager, Cross Site Request Forgery is possible.

   
Finally, the Cross Site Request Forgery vulnerability also affect the summary page, which is PHProjekt's index page.

Remarks
-------
There may be other modules which are affected, but they have not been subject to review at this point.

Solution:
The vulnerabilities were reported on Dec 31 2006 and an update has been released on Mar 14 2007.
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Credit:
Bugs found by Alexios Fakos of n.runs AG.
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References:
http://www.nruns.com/security_advisory_phprojekt_csrf.php
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Unaltered electronic reproduction of this advisory is permitted. For all other reproduction or publication, in printing or otherwise, contact security_at_nruns.com for permission. Use of the advisory constitutes acceptance for use in an "as is" condition. All warranties are excluded. In no event shall n.runs be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if n.runs has been advised of the possibility of such damages.

Copyright 2007 n.runs AG. All rights reserved. Terms of apply.

Original Advisory:
http://www.nruns.de/security_advisory_phprojekt_csrf.php



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