1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
Return-Path: <crypto@timruffing.de>
Received: from smtp2.osuosl.org (smtp2.osuosl.org [140.211.166.133])
by lists.linuxfoundation.org (Postfix) with ESMTP id A9082C002A
for <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 14 May 2023 17:42:00 +0000 (UTC)
Received: from localhost (localhost [127.0.0.1])
by smtp2.osuosl.org (Postfix) with ESMTP id 7CCFA40606
for <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 14 May 2023 17:42:00 +0000 (UTC)
DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 7CCFA40606
Authentication-Results: smtp2.osuosl.org;
dkim=pass (2048-bit key) header.d=timruffing.de header.i=@timruffing.de
header.a=rsa-sha256 header.s=MBO0001 header.b=nKWE+3W9
X-Virus-Scanned: amavisd-new at osuosl.org
X-Spam-Flag: NO
X-Spam-Score: -2.8
X-Spam-Level:
X-Spam-Status: No, score=-2.8 tagged_above=-999 required=5
tests=[BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1,
DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7,
SPF_HELO_NONE=0.001, SPF_PASS=-0.001] autolearn=ham autolearn_force=no
Received: from smtp2.osuosl.org ([127.0.0.1])
by localhost (smtp2.osuosl.org [127.0.0.1]) (amavisd-new, port 10024)
with ESMTP id UUerPnOhv2jB
for <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 14 May 2023 17:41:58 +0000 (UTC)
X-Greylist: delayed 00:05:59 by SQLgrey-1.8.0
DKIM-Filter: OpenDKIM Filter v2.11.0 smtp2.osuosl.org 5427B40181
Received: from mout-p-101.mailbox.org (mout-p-101.mailbox.org
[IPv6:2001:67c:2050:0:465::101])
by smtp2.osuosl.org (Postfix) with ESMTPS id 5427B40181
for <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 14 May 2023 17:41:58 +0000 (UTC)
Received: from smtp102.mailbox.org (smtp102.mailbox.org
[IPv6:2001:67c:2050:b231:465::102])
(using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits)
key-exchange ECDHE (P-384) server-signature RSA-PSS (4096 bits) server-digest
SHA256) (No client certificate requested)
by mout-p-101.mailbox.org (Postfix) with ESMTPS id 4QK8mS1wnJz9snc
for <bitcoin-dev@lists.linuxfoundation.org>;
Sun, 14 May 2023 19:35:52 +0200 (CEST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=timruffing.de;
s=MBO0001; t=1684085752;
h=from:from:reply-to:subject:subject:date:date:message-id:message-id:
to:to:cc:mime-version:mime-version:content-type:content-type:
content-transfer-encoding:content-transfer-encoding;
bh=o6OutmqO14h8UEMYaPkuaXPkvY3LQ+rhonK84a7iylE=;
b=nKWE+3W9ICwSS+HKoo/VCLKLqb+hQ4x9Lj7Bt2rH1tfHt2VlFjdlLPtSeLITRWlz+gniex
t0WtL1HXycF7QzpwyqZzYf+rn4ymWUWzOU4rtb40Whq8Nqtxxs8BDIlTmaa6mejV6sNcJ8
4ICBZ7F7XX0M9s6yHnhjQijGMsKQL8M6MFrQSW4QlmHKQfGcRxc7GHYKjrsw6zADCWCfTF
i55mZQE4jjZsMs7ZSXNfQwXTYzFxcQ51iGlBr88y8QlGdbaaEWIhv1zDwHV3/eNW+PT7G8
J1Mqwr46E+pcpD2zMQu5YE9FYtKH9EF28YXKxgEh1A6ao6APAEWVBOn6wegXGw==
Message-ID: <cf010a83bf60a16e66e40f78494fc7b7b17a336a.camel@timruffing.de>
From: Tim Ruffing <crypto@timruffing.de>
To: bitcoin-dev@lists.linuxfoundation.org
Date: Sun, 14 May 2023 19:35:38 +0200
Content-Type: text/plain; charset="UTF-8"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-Rspamd-Queue-Id: 4QK8mS1wnJz9snc
X-Mailman-Approved-At: Sun, 14 May 2023 19:14:48 +0000
Subject: [bitcoin-dev] libsecp256k1 0.3.2 released
X-BeenThere: bitcoin-dev@lists.linuxfoundation.org
X-Mailman-Version: 2.1.15
Precedence: list
List-Id: Bitcoin Protocol Discussion <bitcoin-dev.lists.linuxfoundation.org>
List-Unsubscribe: <https://lists.linuxfoundation.org/mailman/options/bitcoin-dev>,
<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=unsubscribe>
List-Archive: <http://lists.linuxfoundation.org/pipermail/bitcoin-dev/>
List-Post: <mailto:bitcoin-dev@lists.linuxfoundation.org>
List-Help: <mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=help>
List-Subscribe: <https://lists.linuxfoundation.org/mailman/listinfo/bitcoin-dev>,
<mailto:bitcoin-dev-request@lists.linuxfoundation.org?subject=subscribe>
X-List-Received-Date: Sun, 14 May 2023 17:42:00 -0000
Hello,
We'd like to announce the release of version 0.3.2 of libsecp256k1:
https://github.com/bitcoin-core/secp256k1/releases/tag/v0.3.2
This is a bugfix release after 0.3.1. The impetus for this release is
the discovery that GCC 13 became smart enough to optimize out a
specific timing side-channel protection mechanism in the ECDH code that
could leave applications vulnerable to a side-channel attack. This has
been fixed in 0.3.2 [1].
For the full changelog, see
https://github.com/bitcoin-core/secp256k1/blob/master/CHANGELOG.md
We strongly recommend any users of the library to upgrade if their code
may end up being compiled with GCC >=3D13. Bitcoin Core is not affected
because it does not use libsecp256k1's ECDH module.
Note: The underlying side-channel issue is very similar to the issue
that lead to the previous 0.3.1 release. Unfortunately, there is no
generic way to prevent compilers from "optimizing" code by adding
secret-dependent branches (which are undesired in cryptographic
applications), and it is hard to predict what optimizations future
compiler versions will add. There's ongoing work [2] to test on
unreleased development snapshots of GCC and Clang, which would make it
possible to catch similar cases earlier in the future.
[1]: https://github.com/bitcoin-core/secp256k1/pull/1303
[2]: https://github.com/bitcoin-core/secp256k1/pull/1313
|
