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Luigi Auriemma
Application: CoolPlayer
http://coolplayer.sourceforge.net
Versions: <= 217
Platforms: Windows
Bug: buffer-overflow in CPLI_ReadTag_OGG
Exploitation: local
Date: 28 Dec 2007
Author: Luigi Auriemma
e-mail: aluigi@autistici.org
web: aluigi.org
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1) Introduction
2) Bug
3) The Code
4) Fix
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===============
1) Introduction
===============
CoolPlayer is a tiny open source media player for Windows.
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2) Bug
======
The tags in the OGG Vorbis files are handled by the CPLI_ReadTag_OGG
function which uses sscanf for storing the tag's name and its value in
two stack buffers but the lack of size limiters in the format argument
results in a buffer-overflow.
From CPI_PlaylistItem.c:
void CPLI_ReadTag_OGG(CPs_PlaylistItem* pItem)
...
char cTag[128];
char cValue[2048];
if(sscanf(pComment->user_comments[iCommentIDX], " %[^= ] = %[^=]",
cTag, cValue) == 2)
...
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3) The Code
===========
vorbiscomment -t cTag=AAA_2500_A's_AAA -a input.ogg output.ogg
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4) Fix
======
The problem has been reported to the developers which have said that
will work on this and on any other old public bug.
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---
Luigi Auriemma
http://aluigi.org
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