Signature version line not protected against alteration

[David Shaw]

On Wed, Mar 28, 2007 at 03:03:39AM +0300, randux at Safe-mail.net wrote:
> Greetings all,
> 

> I came upon something a bit odd in gnupg 1.4.7. I found I can change
> the comment field in a signed message to be whatever I like. I
> should think this is a bad thing as an attacker could insert text in
> a message presumably protected against all modifications if the
> signature verifies properly.

The "comment" and "version" armor fields are both essentially
comments, and are ignored by the OpenPGP protocol.  You can change
either of them to whatever you like.

David