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Date: Wed, 6 Jul 2022 06:10:32 -0000 (UTC)
From: Tavis Ormandy <>
Subject: Re: DO NOT OPEN PREVIOUS MAIL Re: Denial of service
 in  GnuPG

On 2022-07-04, Jakub Wilk wrote:
> As a data point, if Mutt has pgp_auto_decode=yes ("automatically attempt 
> to decrypt traditional PGP messages") in the config, it will trigger the 
> DoS when you view the message.

Hmm - I think you don't even need auto_decode, because x-action parameters
can trigger automatic decryption in mutt.

There's an example message here:

> (And it seems that if you lose patience waiting for the message to show 
> up and press ctrl+backslash in attempt to make it quit, it will actually 
> hang forever.)

I think you need at least something like max-output 104857600 in
gnupg.conf if you don't want trivial DoS pranks to be possible :)


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