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Date: Fri, 7 Dec 2012 22:08:47 +0330
From: kaveh ghaemmaghami <kavehghaemmaghami@...glemail.com>
To: full-disclosure@...ts.grok.org.uk
Subject: VLC media player 2.0.4 BOF POC

Title    :  VLC media player 2.0.4 buffer overflow POC
Version  :  2.0.4 Twoflower
Date     :  2012-12-06
Vendor   :  http://www.videolan.org/vlc/
Impact   :  Med/High
Contact  :  coolkaveh [at] rocketmail.com
Twitter  :  @coolkaveh
tested   :  windows XP SP3
Author   :  coolkaveh
#####################################################################################################################
VLC media player (also known as VLC) is a highly portable free and
open-source media player and streaming
media server written by the VideoLAN project. It is a cross-platform
media player, with versions for
Microsoft Windows, OS X, GNU/Linux, Android, BSD, Solaris, iOS,
Syllable, BeOS, MorphOS, QNX and eComStation
#####################################################################################################################
Bug :
----
buffer overflow during the handling of the swf file
context-dependent
Successful exploits can allow attackers to execute arbitrary code
----
######################################################################################################################
(7b4.a14): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=75737574 ebx=00e44c20 ecx=7ffd5000 edx=00e44e84 esi=038488c8 edi=000007c0
eip=75737574 esp=0196fb5c ebp=00000002 iopl=0         nv up ei pl nz na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210206
Missing image name, possible paged-out or corrupt data.
75737574 ??              ???
0:009>!exploitable -v
eax=75737574 ebx=00e44c20 ecx=7ffd5000 edx=00e44e84 esi=038488c8 edi=000007c0
eip=75737574 esp=0196fb5c ebp=00000002 iopl=0         nv up ei pl nz na pe nc
cs=001b  ss=0023  ds=0023  es=0023  fs=003b  gs=0000             efl=00210206
75737574 ??              ???
HostMachine\HostUser
Executing Processor Architecture is x86
Debuggee is in User Mode
Debuggee is a live user mode debugging session on the local machine
Event Type: Exception
*** ERROR: Symbol file could not be found.  Defaulted to export
symbols for ntdll.dll -
*** ERROR: Symbol file could not be found.  Defaulted to export
symbols for C:\Program Files\VideoLAN\VLC\libvlccore.dll -
*** ERROR: Symbol file could not be found.  Defaulted to export
symbols for C:\Program
Files\VideoLAN\VLC\plugins\codec\libavcodec_plugin.dll -
Exception Faulting Address: 0x75737574
First Chance Exception Type: STATUS_ACCESS_VIOLATION (0xC0000005)
Exception Sub-Type: Data Execution Protection (DEP) Violation

Exception Hash (Major/Minor): 0x307d391a.0x6f0f1537

Stack Trace:
Unknown
libvlccore!vout_ReleasePicture+0x32
libavcodec_plugin!vlc_entry_license__1_2_0l+0xe09
libavcodec_plugin!vlc_entry_license__1_2_0l+0xdf26b
libavcodec_plugin!vlc_entry_license__1_2_0l+0xdee0e
libavcodec_plugin!vlc_entry_license__1_2_0l+0xdf37b
ntdll!RtlFreeHeap+0x18b
Instruction Address: 0x0000000075737574

Description: Data Execution Prevention Violation
Short Description: DEPViolation
Exploitability Classification: EXPLOITABLE
Recommended Bug Title: Exploitable - Data Execution Prevention
Violation starting at Unknown Symbol @ 0x0000000075737574 called from
libvlccore!vout_ReleasePicture+0x0000000000000032
(Hash=0x307d391a.0x6f0f1537)

User mode DEP access violations are exploitable.
################################################################################
Proof of concept included.
http://www39.zippyshare.com/v/91522221/file.html

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