full-disclosure - RealPlayer 15.0.6.14(.3g2) WriteAV Vulnerability

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Date: Tue, 30 Oct 2012 13:07:40 +0330
From: kaveh ghaemmaghami <kavehghaemmaghami@...glemail.com>
To: full-disclosure@...ts.grok.org.uk
Subject: RealPlayer 15.0.6.14(.3g2) WriteAV Vulnerability

Hello List
i want to warn u about RealPlayer 15.0.6.14 memory corruption during
the handling of the 3g2 files

look what awesome coolkaveh found
Lets kill that bug
Be safe

<<<<keep it priv8 >>>


Title    :  RealPlayer 15.0.6.14(.3g2) WriteAV Vulnerability
Version  :  15.0.6.14
Date     :  2012-10-29
Vendor   :  http://www.real.com/
crash    :  http://img543.imageshack.us/img543/9130/pocm.jpg
Impact   :  High
Contact  :  coolkaveh [at] rocketmail.com
Twitter  :  @coolkaveh
tested   :  windows 7 x64
Author   :  coolkaveh
###############################################################################
Bug :
----
Memory corruption during the handling of the 3g2 files context-dependent
Successful exploits can allow attackers to execute arbitrary code
----
################################################################################
(f84.8c8): Access violation - code c0000005 (first chance)
First chance exceptions are reported before any exception handling.
This exception may be expected and handled.
eax=040d1370
ebx=7fdfe2d0
ecx=0a67f798
edx=0a67f7a8
esi=00000000
edi=00000004
eip=66fc94df
esp=3c6c1a80
ebp=0a67f764 iopl=0         nv up ei pl nz na po nc
cs=0023  ss=002b  ds=002b  es=002b  fs=0053  gs=002b             efl=00010202
*** ERROR: Symbol file could not be found.  Defaulted to export
symbols for C:\Program Files (x86)\Real\RealPlayer\codecs\dmp4.dll -
dmp4!GetGUID+0x1836f:
66fc94df 8944241c        mov     dword ptr [esp+1Ch],eax
ss:002b:3c6c1a9c=????????
0:029> !exploitable -v
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
Exception Faulting Address: 0x3c6c1a9c
First Chance Exception Type: STATUS_ACCESS_VIOLATION (0xC0000005)
Exception Sub-Type: Write Access Violation

Exception Hash (Major/Minor): 0x247c7f22.0x247c7f63

Stack Trace:
dmp4!GetGUID+0x1836f
Instruction Address: 0x0000000066fc94df

Description: User Mode Write AV
Short Description: WriteAV
Exploitability Classification: EXPLOITABLE
Recommended Bug Title: Exploitable - User Mode Write AV starting at
dmp4!GetGUID+0x000000000001836f (Hash=0x247c7f22.0x247c7f63)

User mode write access violations that are not near NULL are exploitable.
################################################################################
Proof of concept included.
http://www21.zippyshare.com/v/83302158/file.html

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