diff options
Diffstat (limited to 'dev-libs/openssl/files/openssl-1.1.1-CVE-2018-0735.patch')
-rw-r--r-- | dev-libs/openssl/files/openssl-1.1.1-CVE-2018-0735.patch | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/dev-libs/openssl/files/openssl-1.1.1-CVE-2018-0735.patch b/dev-libs/openssl/files/openssl-1.1.1-CVE-2018-0735.patch new file mode 100644 index 000000000000..295f5dbe8d82 --- /dev/null +++ b/dev-libs/openssl/files/openssl-1.1.1-CVE-2018-0735.patch @@ -0,0 +1,44 @@ +From b1d6d55ece1c26fa2829e2b819b038d7b6d692b4 Mon Sep 17 00:00:00 2001 +From: Pauli <paul.dale@oracle.com> +Date: Fri, 26 Oct 2018 10:54:58 +1000 +Subject: [PATCH] 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) +--- + crypto/ec/ec_mult.c | 6 +++--- + 1 file changed, 3 insertions(+), 3 deletions(-) + +diff --git a/crypto/ec/ec_mult.c b/crypto/ec/ec_mult.c +index 7e1b3650e7..0e0a5e1394 100644 +--- a/crypto/ec/ec_mult.c ++++ b/crypto/ec/ec_mult.c +@@ -206,8 +206,8 @@ int ec_scalar_mul_ladder(const EC_GROUP *group, EC_POINT *r, + */ + 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)) { + ECerr(EC_F_EC_SCALAR_MUL_LADDER, ERR_R_BN_LIB); + goto err; + } +@@ -244,7 +244,7 @@ int ec_scalar_mul_ladder(const EC_GROUP *group, EC_POINT *r, + * 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) +-- +2.19.1 + |