#47222 - Serious bug in Nettle's ecdsa_verify

Package	Source(s)		Maintainer(s)
guix		PTS Buildd Popcon

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From: Ludovic Courtès <ludo@gnu.org>
To: Niels Möller <nisse@lysator.liu.se>
Subject: Re: bug#47222: Serious bug in Nettle's ecdsa_verify
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Date: Thu, 25 Mar 2021 10:51:51 +0100
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 Mar 2021 15:47:47 -0400")
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Hi Niels,

> I've prepared a new bug-fix release of Nettle, a low-level
> cryptographics library, to fix a serious bug in the function to verify
> ECDSA signatures. Implications include an assertion failure, which could
> be used for denial-of-service, when verifying signatures on the
> secp_224r1 and secp521_r1 curves. More details in NEWS file below.
>
> Upgrading is strongly recomended.

Are there plans to make a new 3.5 release including these fixes?
Alternatively, could you provide guidance as to which commits should be
cherry-picked in 3.5 for downstream distros?

I’m asking because in Guix, the easiest way for us to deploy the fixes
on the ‘master’ branch would be by “grafting” a new Nettle variant
ABI-compatible with 3.5.1, which is the one packages currently depend on.

Thanks in advance,
Ludo’.

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#47222 Serious bug in Nettle's ecdsa_verify