SEC Consult SA-20070226-0 :: File Disclosure in Pagesetter for PostNuke

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SEC Consult Security Advisory 20070226-0
=======================================================================
                  title: File Disclosure in Pagesetter for PostNuke
                program: Pagesetter page creation module
     vulnerable version: 6.2.0
                         6.3.0 beta 5
                 impact: high
               homepage: http://www.elfisk.dk
                  found: 2006-11-21
                     by: D. Matscheko / SEC-CONSULT /
www.sec-consult.com
=======================================================================

vendor description:
---------------

Pagesetter is a publishing module that allows the PostNuke users to
create web pages from structured data, with the data structure and
output templates defined by the PostNuke administrator.

[Source: http://www.elfisk.dk]


vulnerability overview:
---------------

The 3rd party module Pagesetter - up to its latest version (6.3.0
beta 5) - for PostNuke allows to read arbitrary files. An attacker
does not need to be logged in but has to know the filename.


proof of concept:
---------------

Here is a sample request that reads the file '/etc/passwd':

$ GET
'http://example.com/index.php?module=Pagesetter&type=file&func=preview&id=../../../../../../../../../etc/passwd%00'


vulnerable versions:
---------------

Version 6.2.0 as well as 6.3.0 beta 5 are vulnerable to the
described attack. No older versions were tested.


vendor status:
---------------
vendor notified: 2007-02-08
vendor response: 2007-02-08
patch available: 2007-02-08
coordinated disclosure: 2007-02-26

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EOF David Matscheko / @2007