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SUSE:SLE-12-SP1:GA
compat-openssl098.16428
openssl-CVE-2016-7056.patch
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File openssl-CVE-2016-7056.patch of Package compat-openssl098.16428
From 249bcf31405e1622d05ef60dc5e73c54efa64f3c Mon Sep 17 00:00:00 2001 From: =?UTF-8?q?Cesar=20Pereida=20Garc=C3=ADa?= <cesar.pereidagarcia@tut.fi> Date: Fri, 16 Dec 2016 12:02:19 +0200 Subject: [PATCH] ECDSA vulnerable to cache-timing attack. BN_mod_inverse fails to take constant-time path, thus leaking nonce's information. --- crypto/ecdsa/ecs_ossl.c | 2 ++ 1 file changed, 2 insertions(+) Index: openssl-0.9.8j/crypto/ecdsa/ecs_ossl.c =================================================================== --- openssl-0.9.8j.orig/crypto/ecdsa/ecs_ossl.c 2017-02-06 16:57:09.848150903 +0100 +++ openssl-0.9.8j/crypto/ecdsa/ecs_ossl.c 2017-02-06 16:57:25.212383621 +0100 @@ -154,6 +154,7 @@ static int ecdsa_sign_setup(EC_KEY *ecke if (!BN_add(k, k, order)) goto err; #endif /* def(ECDSA_POINT_MUL_NO_CONSTTIME) */ + BN_set_flags(k, BN_FLG_CONSTTIME); /* compute r the x-coordinate of generator * k */ if (!EC_POINT_mul(group, tmp_point, k, NULL, NULL, ctx)) {
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