phpAdsNew Input Validation Bugs in '/admin/lib-sessions.inc.php' Permit SQL Injection Attacks
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SecurityTracker Alert ID: 1015193
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SecurityTracker URL: http://securitytracker.com/id?1015193
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CVE Reference: GENERIC-MAP-NOMATCH
(Links to External Site)
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Date: Nov 11 2005
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Impact: Disclosure of system information, Disclosure of user information
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Exploit Included: Yes
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Advisory: Zone-H
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Version(s): 2.0.6 and prior versions
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Description: A vulnerability was reported in phpAdsNew. A remote user can inject SQL commands.
The '/admin/lib-sessions.inc.php' script does not properly validate user-supplied input in the 'sessionID' cookie variable. A remote
user can supply a specially crafted parameter value to execute SQL commands on the underlying database.
A demonstration exploit
value is provided:
sessionID=adsds'/**/UNION/**/SELECT admin_pw from phpads_config into outfile "/var/www/blah.txt"/*;
Kevin
Fernandez "Siegfried" from the Zone-H Research Team discovered this vulnerability.
The original advisory is available at:
http://www.zone-h.org/en/advisories/read/i
d=8413/
http://www.zone-h.fr/fr/advisories/read/id=674/
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Impact: A remote user can execute SQL commands on the underlying database.
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Solution: No solution was available at the time of this entry.
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Vendor URL: phpadsnew.com/ (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (Any), Windows (Any)
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Reported By: Siegfried <siegfri3d@gmail.com>
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Message History:
None.
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Source Message Contents
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Date: Fri, 11 Nov 2005 07:34:57 +0100
From: Siegfried <siegfri3d@gmail.com>
Subject: [Full-disclosure] ZRCAS-200502 - phpAdsNew SQL Injection
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Zone-H Research Center Security Advisory 200502
http://www.zone-h.fr
Date of release: 11/11/2005
Software: phpAdsNew (www.phpadsnew.com)
Affected versions:
<= 2.0.6
2.0.7rc1 (latest CVS snapshot)
Risk: Medium
Discovered by: Kevin Fernandez "Siegfried" from the Zone-H Research Team
Background (from their web site)
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phpAdsNew is an open-source ad server, with an integrated banner
management interface and tracking system for gathering statistics.
With phpAdsNew you can easily rotate paid banners and your own
in-house advertisements. You can even integrate banners from third
party advertising companies.
Details
--------
Toni Koivunen has published an advisory yesterday regarding a
vulnerability exploitable via /admin/logout.php, that can be used to
delete arbitrary data (maybe more). However more sql injections are
present in this part of the code, all the functions in
/admin/lib-sessions.inc.php do not check the "sessionID" variable
coming from the cookie, the most interesting is
phpAds_SessionDataFetch() because it is called in config.php and makes
a simple SELECT query.
Snip:
[no previous check]
if (isset($HTTP_COOKIE_VARS['sessionID']) &&
$HTTP_COOKIE_VARS['sessionID'] != '')
{
$result = phpAds_dbQuery("SELECT sessiondata FROM
".$phpAds_config['tbl_session']." WHERE
sessionid='".$HTTP_COOKIE_VARS['sessionID']."'" .
" AND UNIX_TIMESTAMP(NOW())-UNIX_TIMESTAMP(lastused) < 3600"); <-- ouch
Since /admin/config.php is included in /admin/index.php, we don't need
to be authenticated to exploit the vulnerability.
PoC (cookie):
sessionID=adsds'/**/UNION/**/SELECT admin_pw from phpads_config into
outfile "/var/www/blah.txt"/*;
Just "exploit" one of the many errors in the pages to get the path and
here you go, open /admin/index.php with that as cookie.
Solution
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No patch.
Filter the variable in the affected functions.
Original advisories:
English version: http://www.zone-h.org/en/advisories/read/id=8413/
French: http://www.zone-h.fr/fr/advisories/read/id=674/
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