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Date: Mon, 1 Nov 2021 17:51:08 -0400
From: Santiago Torres <>
Subject: Re: Trojan Source Attacks

On Mon, Nov 01, 2021 at 09:51:38PM +0100, Jan Engelhardt wrote:
> On Monday 2021-11-01 18:27, Nicholas Boucher wrote:
> >
> >We have identified an issue affecting all compilers and interpreters that support Unicode.
> >[...]
> >The attached paper describes an attack paradigm -- which we believe to be novel -- discovered by security researchers at the
> >University of Cambridge.
> Not so novel. At one time, this picture made the rounds
> ( - the pic is likely
> older than this 2018 tweet), and anyone who knew that Unicode had zero-width
> characters already made the connection.

Along the same lines, there were a myriad of attacks using bash-style
sequences to obscure parts of patches inside of git show/git log/less/
other pagers not too long ago (circa 2017, maybe?). We even discussed
similar possibilities on this paper[1] (sec 4.3) when mentioning git
commit signing of content displayed on collaborative coding platforms.

Overall there's a plethora of work around "punycode meets tool X" that
I'm surprised this is called novel.



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