Check Point Software Technologies - Vulnerability Discovery Team (VDT)
http://www.checkpoint.com/defense/

Memory corruption when Adobe Shockwave Player parses .dir media file
CVE-2010-2868


INTRODUCTION

Adobe Shockwave Player is the Adobe plugin to many different browsers to view rich-media content on the web including animations, interactive presentations, and online entertainment.

Adobe Shockwave player does not properly parse .dir media file, which causes a corruption in module IML32.dll by opening a malformed file with an invalid value located in PoC repro04.dir at offset 0x320D.

This problem was confirmed in the following versions of Adobe Shockwave Player, other versions may be also affected.

Shockwave Player version 11.5.7.609 and older for Windows and MacOS


CVSS Scoring System

The CVSS score is: 9
	Base Score: 10
	Temporal Score: 9
We used the following values to calculate the scores:
	Base score is: AV:N/AC:L/Au:N/C:C/I:C/A:C
	Temporal score is: E:POC/RL:U/RC:C


TRIGGERING THE PROBLEM

To trigger the problem PoC files (repro04.dir, repro05.dir, repro06.dir, repro07.dir, repro08.dir and repro09.dir) are available to interested parts. 


DETAILS

Disassembly:

69081240   74 46            JE SHORT IML32.69081288
69081242   8B16             MOV EDX,DWORD PTR DS:[ESI]
69081244   8B46 08          MOV EAX,DWORD PTR DS:[ESI+8]
69081247   83E2 02          AND EDX,2
6908124A   0BD5             OR EDX,EBP
6908124C   83CA 01          OR EDX,1
6908124F   8916             MOV DWORD PTR DS:[ESI],EDX
69081251   8B56 04          MOV EDX,DWORD PTR DS:[ESI+4]
69081254   8950 04          MOV DWORD PTR DS:[EAX+4],EDX
69081257   8B46 04          MOV EAX,DWORD PTR DS:[ESI+4]
6908125A   8B56 08          MOV EDX,DWORD PTR DS:[ESI+8]
6908125D   8950 08          MOV DWORD PTR DS:[EAX+8],EDX
69081260   8BFE             MOV EDI,ESI
69081262   03F5             ADD ESI,EBP
69081264   894C31 FC        MOV DWORD PTR DS:[ECX+ESI-4],ECX <--- Problem



ECX = 0x616CF240
ESI = 0x06C94038


CREDITS

This vulnerability was discovered and researched by Rodrigo Rubira Branco from Check Point Vulnerability Discovery Team (VDT).