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openSUSE:Leap:15.5:Update
openssl-1_1.13613
openssl-CVE-2018-0735.patch
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File openssl-CVE-2018-0735.patch of Package openssl-1_1.13613
commit 56fb454d281a023b3f950d969693553d3f3ceea1 Author: Pauli <paul.dale@oracle.com> Date: Fri Oct 26 10:54:58 2018 +1000 Timing vulnerability in ECDSA signature generation (CVE-2018-0735) Preallocate an extra limb for some of the big numbers to avoid a reallocation that can potentially provide a side channel. Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> (Merged from https://github.com/openssl/openssl/pull/7486) (cherry picked from commit 99540ec79491f59ed8b46b4edf130e17dc907f52) Index: openssl-1.1.0i/crypto/ec/ec_mult.c =================================================================== --- openssl-1.1.0i.orig/crypto/ec/ec_mult.c 2018-08-14 14:45:07.000000000 +0200 +++ openssl-1.1.0i/crypto/ec/ec_mult.c 2018-11-05 12:23:45.837619464 +0100 @@ -177,8 +177,8 @@ static int ec_mul_consttime(const EC_GRO */ cardinality_bits = BN_num_bits(cardinality); group_top = bn_get_top(cardinality); - if ((bn_wexpand(k, group_top + 1) == NULL) - || (bn_wexpand(lambda, group_top + 1) == NULL)) + if ((bn_wexpand(k, group_top + 2) == NULL) + || (bn_wexpand(lambda, group_top + 2) == NULL)) goto err; if (!BN_copy(k, scalar)) @@ -205,7 +205,7 @@ static int ec_mul_consttime(const EC_GRO * k := scalar + 2*cardinality */ kbit = BN_is_bit_set(lambda, cardinality_bits); - BN_consttime_swap(kbit, k, lambda, group_top + 1); + BN_consttime_swap(kbit, k, lambda, group_top + 2); group_top = bn_get_top(group->field); if ((bn_wexpand(s->X, group_top) == NULL)
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