RE: [Full-Disclosure] Re: Buffer Overflow in ActivePerl ?

["Petter O. Bruland" <pbruland@xxxxxxxx>]

Seems to be working fine in version 5.8.1. No errors or crash on my system 
(Win2K all patches - that 04011 -patch)

P:\>perl -v

This is perl, v5.8.1 built for MSWin32-x86-multi-thread
(with 1 registered patch, see perl -V for more detail)

Copyright 1987-2003, Larry Wall

Binary build 807 provided by ActiveState Corp. http://www.ActiveState.com
ActiveState is a division of Sophos.
Built 18:19:11 Nov  3 2003


Perl may be copied only under the terms of either the Artistic License or the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using `man perl' or `perldoc perl'.  If you have access to the
Internet, point your browser at http://www.perl.com/, the Perl Home Page.


P:\>perl -e "$a="A" x 256; system($a)"

P:\>

Petter O. Bruland
Network Tech @ KKBR, Las Vegas.

-----Original Message-----
From: Bill Royds [mailto:full-disclosure@xxxxxxxxx]
Sent: Tuesday, May 18, 2004 4:23 AM
To: Oliver@xxxxxxxxxx
Cc: full-disclosure@xxxxxxxxxxxxxxxx; bugtraq@xxxxxxxxxxxxxxxxx
Subject: RE: [Full-Disclosure] Re: Buffer Overflow in ActivePerl ?



C:\Documents and Settings\Bill>Perl -v

This is perl, v5.8.0 built for MSWin32-x86-multi-thread
(with 1 registered patch, see perl -V for more detail)

Copyright 1987-2002, Larry Wall

Binary build 802 provided by ActiveState Corp. http://www.ActiveState.com
Built 00:54:02 Nov  8 2002


Perl may be copied only under the terms of either the Artistic License or
the
GNU General Public License, which may be found in the Perl 5 source kit.

Complete documentation for Perl, including FAQ lists, should be found on
this system using `man perl' or `perldoc perl'.  If you have access to the
Internet, point your browser at http://www.perl.com/, the Perl Home Page.


C:\Documents and Settings\Bill>perl -e "$a="A" x 256; system($a)" 


===========crashes with instruction at ox78f... Referenced memory at
0x41414141
 so it is a stqack overflow. Haven't tried to exploit it yet.


-----Original Message-----
From: full-disclosure-admin@xxxxxxxxxxxxxxxx
[mailto:full-disclosure-admin@xxxxxxxxxxxxxxxx] On Behalf Of
rich.sf@xxxxxxxxxxx
Sent: May 17, 2004 8:59 PM
To: Oliver@xxxxxxxxxx
Cc: full-disclosure@xxxxxxxxxxxxxxxx; bugtraq@xxxxxxxxxxxxxxxxx
Subject: [Full-Disclosure] Re: Buffer Overflow in ActivePerl ?

Reproduced with 5.6.1/win95.

On Mon, 17 May 2004, Oliver@xxxxxxxxxx wrote:

> Date: Mon, 17 May 2004 22:23:56 +0200
> From: "Oliver@xxxxxxxxxx" <Oliver@xxxxxxxxxx>
> To: full-disclosure@xxxxxxxxxxxxxxxx
> Cc: bugtraq@xxxxxxxxxxxxxxxxx
> Subject: Buffer Overflow in ActivePerl ?
>
> hi folks,
>
> i played around with ActiveState's ActivePerl for Win32, and crashed
> Perl.exe with the following command:
>
> perl -e "$a="A" x 256; system($a)"
>
> I wonder if this bug isnt known?!? Because system() is a very common
> command....
> Can anybody reproduce this?
>
> I put together a little advisory on my website, including version
> information and a debugger output (Drwatson):
>
>     http://www.oliverkarow.de/research/ActivePerlSystemBOF.txt
>
>
> PS:  Due to travel activity, i will not be able to respond to mails
> within the next 8 days!
>
> Regards,
>
> Oliver
>

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Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html