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Date: Tue, 2 Nov 2021 16:52:33 -0400 (EDT)
From: Stuart D Gathman <stuart@...hman.org>
To: oss-security@...ts.openwall.com
Subject: Re: Trojan Source Attacks
On Mon, 1 Nov 2021, Nicholas Boucher wrote:
> The first and primary technique, which we dub the Trojan Source attack, uses
> Unicode Bidirectional (Bidi) control characters embedded in comments and
> string literals to produce visually deceptive source code files. This
> technique enables an adversary to encode constructs that visually appear to
> be comments or string literals but execute as code, or vice versa. Complete
> details, as well as recommended mitigations, can be found in the attachment
> 001 Trojan Source.pdf. This vulnerability is tracked under CVE-2021-42574.
Syntax coloring thus becomes a critical security tool. And bugs in
syntax coloring for an editor/viewer should be consider security flaws
and reported on oss-security.
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