full-disclosure - Re: Gaim festival plugin exploit

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Message-ID: <3F90AC5F.4070405@onryou.com>
From: lists at onryou.com (Cael Abal)
Subject: Re: Gaim festival plugin exploit

> 
> DUH... would help if I attached my attachment.
> 
> I am right proud of myself for this, and it also needs mention to
> address the security issue that our friend Error (is that a reference to
> Zelda 2?) raised.
>  
> Attached, find the latest reissue of the Gaim festival plugin.  The guy
> that wrote it, wrote it for pre-0.68 Perl API, but it was secure against
> the sort of attack that Error described.  I have since taken it and
> recoded it to work with post-0.68 versions of Gaim.  It is attached.  By
> all means, if you see an exploitable bug in there, let me know!  I'm
> just a perl-tot..

Hi Brian,

This updated version is still vulnerable.  You should be *very* wary of 
any call to system() or fork().  Consider this input:

"This is only a test && rm -rf /"

Notice that ';' isn't the only way to inject into a commandline.

Cheers,

Cael