From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wr0-f175.google.com (mail-wr0-f175.google.com [209.85.128.175]) by mail.openembedded.org (Postfix) with ESMTP id ACCFE7807D for ; Tue, 18 Jul 2017 22:07:38 +0000 (UTC) Received: by mail-wr0-f175.google.com with SMTP id w4so47375797wrb.2 for ; Tue, 18 Jul 2017 15:07:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=intel-com.20150623.gappssmtp.com; s=20150623; h=from:to:subject:date:message-id; bh=T9C7+IZXyo+NxKSrHe0J03E7J6Hzq8mzqUeu1tOy4MA=; b=jWxoO8fsBVyowdgbz8vcgg/UsQ8KCc8FMNvEbjGS7ESb61z72IsbHi3AvGSL/Af4UN 8xyzuuJM/BYhuaUP9rX7RmUwW0Coq3KknbNuS9A2VC9btK5N7X0xGSymKVNu8cyA+4nm 5O3+KUew8JzOX/jnQWKFOd+CbPYmYDgOTE2Oyn2NZzW2etgc8n16A7V3K0KXbKMH1TTL RQ0iPn7eRimIddaaRX1rMpT7c7VjX0OdwDDItJxitgPsQHiFw2BZBuMYwyHZAkxvIASe vLXgJeXUBn53ymY4jbSOU07xxgNdMmiZivzdWFD2jb9zXIwxz+QX+IDH8idkdWHz4eCl 7LOw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:subject:date:message-id; bh=T9C7+IZXyo+NxKSrHe0J03E7J6Hzq8mzqUeu1tOy4MA=; b=Nd3m2aMhsd3udhV03i5GyiZypZti6jtAmmGsHNonkoekmkypXIL7VodUnF+hNpvMiU RzuBMiO19mWVkbSk3ZXFu0DrwMP0lUhZEfJpPQTMXwmTn838+1UAos7FhqHjT6TElzOi kEeTSg+CRVw4kYNZELws8C5UJmI9I8e/1f70vh/Z3sSEiujbqSUMORLzOsF3v2aYGtAN sEWk4rk9c8cgj43X+IEhKrr5Jytzf780ynODkgEV5m/Fot4VwcH3JvdCU3lwAOgvn+Yz Z3K5MKvJXWC/kgBOAcd4nPCA6LXDmplnaW2wKakSdhn3LOehiQ2u/lc36Id8z9Mz0eMp j9rw== X-Gm-Message-State: AIVw110O/bVr2rr39AacLfuJ+JAIczXXYXSa5uQGI+bL6FU9c3hncKxI BF7ugml1wm8tI9jvx+g= X-Received: by 10.223.150.54 with SMTP id b51mr2461459wra.185.1500415659348; Tue, 18 Jul 2017 15:07:39 -0700 (PDT) Received: from flashheart.burtonini.com (home.burtonini.com. [81.2.106.35]) by smtp.gmail.com with ESMTPSA id z108sm5690851wrb.41.2017.07.18.15.07.38 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Tue, 18 Jul 2017 15:07:38 -0700 (PDT) From: Ross Burton To: openembedded-core@lists.openembedded.org Date: Tue, 18 Jul 2017 23:07:34 +0100 Message-Id: <20170718220735.6547-1-ross.burton@intel.com> X-Mailer: git-send-email 2.11.0 Subject: [PATCH][morty 1/2] libgcrypt: fix CVE-2017-9526 X-BeenThere: openembedded-core@lists.openembedded.org X-Mailman-Version: 2.1.12 Precedence: list List-Id: Patches and discussions about the oe-core layer List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 18 Jul 2017 22:07:39 -0000 In libgcrypt before 1.7.7, an attacker who learns the EdDSA session key (from side-channel observation during the signing process) can easily recover the long-term secret key. 1.7.7 makes a cipher/ecc-eddsa.c change to store this session key in secure memory, to ensure that constant-time point operations are used in the MPI library. Signed-off-by: Ross Burton --- ...-Store-EdDSA-session-key-in-secure-memory.patch | 39 ++++++++++++++++++++++ meta/recipes-support/libgcrypt/libgcrypt.inc | 1 + 2 files changed, 40 insertions(+) create mode 100644 meta/recipes-support/libgcrypt/files/0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch diff --git a/meta/recipes-support/libgcrypt/files/0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch b/meta/recipes-support/libgcrypt/files/0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch new file mode 100644 index 00000000000..f6c4ca76f33 --- /dev/null +++ b/meta/recipes-support/libgcrypt/files/0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch @@ -0,0 +1,39 @@ +CVE: CVE-2017-9526 +Upstream-Status: Backport +Signed-off-by: Ross Burton + +From b3cab278eb9c2ceda79f980bc26460d97f260041 Mon Sep 17 00:00:00 2001 +From: Jo Van Bulck +Date: Thu, 19 Jan 2017 17:00:15 +0100 +Subject: [PATCH] ecc: Store EdDSA session key in secure memory. + +* cipher/ecc-eddsa.c (_gcry_ecc_eddsa_sign): use mpi_snew to allocate +session key. +-- + +An attacker who learns the EdDSA session key from side-channel +observation during the signing process, can easily revover the long- +term secret key. Storing the session key in secure memory ensures that +constant time point operations are used in the MPI library. + +Signed-off-by: Jo Van Bulck +--- + cipher/ecc-eddsa.c | 2 +- + 1 file changed, 1 insertion(+), 1 deletion(-) + +diff --git a/cipher/ecc-eddsa.c b/cipher/ecc-eddsa.c +index f91f8489..813e030d 100644 +--- a/cipher/ecc-eddsa.c ++++ b/cipher/ecc-eddsa.c +@@ -603,7 +603,7 @@ _gcry_ecc_eddsa_sign (gcry_mpi_t input, ECC_secret_key *skey, + a = mpi_snew (0); + x = mpi_new (0); + y = mpi_new (0); +- r = mpi_new (0); ++ r = mpi_snew (0); + ctx = _gcry_mpi_ec_p_internal_new (skey->E.model, skey->E.dialect, 0, + skey->E.p, skey->E.a, skey->E.b); + b = (ctx->nbits+7)/8; +-- +2.11.0 + diff --git a/meta/recipes-support/libgcrypt/libgcrypt.inc b/meta/recipes-support/libgcrypt/libgcrypt.inc index 15805cd4365..7c4c0e83b53 100644 --- a/meta/recipes-support/libgcrypt/libgcrypt.inc +++ b/meta/recipes-support/libgcrypt/libgcrypt.inc @@ -20,6 +20,7 @@ SRC_URI = "${GNUPG_MIRROR}/libgcrypt/libgcrypt-${PV}.tar.gz \ file://libgcrypt-fix-building-error-with-O2-in-sysroot-path.patch \ file://fix-ICE-failure-on-mips-with-option-O-and-g.patch \ file://fix-undefined-reference-to-pthread.patch \ + file://0001-ecc-Store-EdDSA-session-key-in-secure-memory.patch \ " BINCONFIG = "${bindir}/libgcrypt-config" -- 2.11.0