RealPlayer vidplin.dll AVI Processing Heap Overflow
Release Date:
June 23, 2005
Date Reported:
May 4, 2005
Patch Development Time (In Days): 36
Severity:
High (Code Execution)
Vendor:
RealNetworks
Systems Affected:
For Microsoft Windows
RealPlayer 10.5 (6.0.12.1040-1069)
RealPlayer 10
RealOne Player v2
RealOne Player v1
RealPlayer 8
RealPlayer Enterprise
Overview:
eEye Digital Security has discovered a critical vulnerability in RealPlayer.
The vulnerability allows a remote attacker to reliably overwrite heap memory
with arbitrary data and execute arbitrary code in the context of the user who
executed the player.
This specific flaw exists within the vidplin.dll file used by RealPlayer. By
specially crafting a malformed .avi movie file, a direct heap overwrite is
triggered, and reliable code execution is then possible. This vulnerability
can be trigger when a user views a webpage, or opens an .avi file via email,
instant messenger, or other common file transfer programs.
Technical Details:
When processing AVI files RealPlayer calls upon a specific DLL, vidplin.dll,
where the vulnerability lies. Realplayer relies
on a strf structure value and allocates a fixed memory space of 0x428 that can
be overflowed with values greater than the fixed buffer size causing arbitrary
code to be executed.
Protection:
Retina - Network Security Scanner - has been updated to identify this
vulnerability.
Blink - End-point Vulnerability Prevention - protects from this vulnerability.
Vendor Status:
RealNetworks has released a patch for this vulnerability.
http://service.real.com/help/faq/security/050623_player/EN/
Credit:
Discovery: Flashsky
Related Links:
Retina Network Security Scanner - Free 15 Day Trial
http://www.eeye.com/html/Products/Retina/download.html
Blink End Point Vulnerability Prevention
http://www.eeye.com/html/Products/Blink
Copyright (c) 1998-2005 eEye Digital Security
Permission is hereby granted for the redistribution of this alert
electronically. It is not to be edited in any way
without express consent of eEye. If you wish to reprint the whole or any part
of this alert in any other medium excluding
electronic medium, please email alert@eEye.com for permission.
Disclaimer
The information within this paper may change without notice. Use of this
information constitutes acceptance for use in an
AS IS condition. There are no warranties, implied or express, with regard to
this information. In no event shall the author
be liable for any direct or indirect damages whatsoever arising out of or in
connection with the use or spread of this
information. Any use of this information is at the user's own risk.
