Date: Wed, 31 Oct 2018 17:50:27 +0000 (UTC) From: Bernard Spil <brnrd@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-branches@freebsd.org Subject: svn commit: r483601 - in branches/2018Q4/security/openssl-devel: . files Message-ID: <201810311750.w9VHoRwv039772@repo.freebsd.org>
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Author: brnrd Date: Wed Oct 31 17:50:27 2018 New Revision: 483601 URL: https://svnweb.freebsd.org/changeset/ports/483601 Log: MFH: r483493 security/openssl-devel: Move patches - Add fix from upstream [1] 1: https://github.com/openssl/openssl/commit/003f1bfd Approved by: ports-secteam (miwi) Added: branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0734 - copied unchanged from r483493, head/security/openssl-devel/files/patch-CVE-2018-0734 branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0735 - copied unchanged from r483493, head/security/openssl-devel/files/patch-CVE-2018-0735 Modified: branches/2018Q4/security/openssl-devel/Makefile Directory Properties: branches/2018Q4/ (props changed) Modified: branches/2018Q4/security/openssl-devel/Makefile ============================================================================== --- branches/2018Q4/security/openssl-devel/Makefile Wed Oct 31 17:45:46 2018 (r483600) +++ branches/2018Q4/security/openssl-devel/Makefile Wed Oct 31 17:50:27 2018 (r483601) @@ -3,6 +3,7 @@ PORTNAME= openssl PORTVERSION= 1.1.0i +PORTREVISION= 1 CATEGORIES= security devel MASTER_SITES= https://www.openssl.org/source/ \ ftp://ftp.cert.dfn.de/pub/tools/net/openssl/source/ Copied: branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0734 (from r483493, head/security/openssl-devel/files/patch-CVE-2018-0734) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0734 Wed Oct 31 17:50:27 2018 (r483601, copy of r483493, head/security/openssl-devel/files/patch-CVE-2018-0734) @@ -0,0 +1,98 @@ +Timing vulnerability in DSA signature generation (CVE-2018-0734). + +Avoid a timing attack that leaks information via a side channel that +triggers when a BN is resized. Increasing the size of the BNs +prior to doing anything with them suppresses the attack. + +Thanks due to Samuel Weiser for finding and locating this. + +Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> +(Merged from #7486) + +(cherry picked from commit a9cfb8c) + +https://github.com/openssl/openssl/commit/8abfe72e8c1de1b95f50aa0d9134803b4d00070f +--- crypto/dsa/dsa_ossl.c.orig 2018-09-11 12:48:21 UTC ++++ crypto/dsa/dsa_ossl.c +@@ -9,6 +9,7 @@ + + #include <stdio.h> + #include "internal/cryptlib.h" ++#include "internal/bn_int.h" + #include <openssl/bn.h> + #include <openssl/sha.h> + #include "dsa_locl.h" +@@ -178,9 +179,9 @@ static int dsa_sign_setup(DSA *dsa, BN_C + { + BN_CTX *ctx = NULL; + BIGNUM *k, *kinv = NULL, *r = *rp; +- BIGNUM *l, *m; ++ BIGNUM *l; + int ret = 0; +- int q_bits; ++ int q_bits, q_words; + + if (!dsa->p || !dsa->q || !dsa->g) { + DSAerr(DSA_F_DSA_SIGN_SETUP, DSA_R_MISSING_PARAMETERS); +@@ -189,8 +190,7 @@ static int dsa_sign_setup(DSA *dsa, BN_C + + k = BN_new(); + l = BN_new(); +- m = BN_new(); +- if (k == NULL || l == NULL || m == NULL) ++ if (k == NULL || l == NULL) + goto err; + + if (ctx_in == NULL) { +@@ -201,9 +201,9 @@ static int dsa_sign_setup(DSA *dsa, BN_C + + /* Preallocate space */ + q_bits = BN_num_bits(dsa->q); +- if (!BN_set_bit(k, q_bits) +- || !BN_set_bit(l, q_bits) +- || !BN_set_bit(m, q_bits)) ++ q_words = bn_get_top(dsa->q); ++ if (!bn_wexpand(k, q_words + 2) ++ || !bn_wexpand(l, q_words + 2)) + goto err; + + /* Get random k */ +@@ -238,14 +238,17 @@ static int dsa_sign_setup(DSA *dsa, BN_C + * small timing information leakage. We then choose the sum that is + * one bit longer than the modulus. + * +- * TODO: revisit the BN_copy aiming for a memory access agnostic +- * conditional copy. ++ * There are some concerns about the efficacy of doing this. More ++ * specificly refer to the discussion starting with: ++ * https://github.com/openssl/openssl/pull/7486#discussion_r228323705 ++ * The fix is to rework BN so these gymnastics aren't required. + */ + if (!BN_add(l, k, dsa->q) +- || !BN_add(m, l, dsa->q) +- || !BN_copy(k, BN_num_bits(l) > q_bits ? l : m)) ++ || !BN_add(k, l, dsa->q)) + goto err; + ++ BN_consttime_swap(BN_is_bit_set(l, q_bits), k, l, q_words + 2); ++ + if ((dsa)->meth->bn_mod_exp != NULL) { + if (!dsa->meth->bn_mod_exp(dsa, r, dsa->g, k, dsa->p, ctx, + dsa->method_mont_p)) +@@ -258,7 +261,7 @@ static int dsa_sign_setup(DSA *dsa, BN_C + if (!BN_mod(r, r, dsa->q, ctx)) + goto err; + +- /* Compute part of 's = inv(k) (m + xr) mod q' */ ++ /* Compute part of 's = inv(k) (m + xr) mod q' */ + if ((kinv = BN_mod_inverse(NULL, k, dsa->q, ctx)) == NULL) + goto err; + +@@ -273,7 +276,6 @@ static int dsa_sign_setup(DSA *dsa, BN_C + BN_CTX_free(ctx); + BN_clear_free(k); + BN_clear_free(l); +- BN_clear_free(m); + return ret; + } + Copied: branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0735 (from r483493, head/security/openssl-devel/files/patch-CVE-2018-0735) ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ branches/2018Q4/security/openssl-devel/files/patch-CVE-2018-0735 Wed Oct 31 17:50:27 2018 (r483601, copy of r483493, head/security/openssl-devel/files/patch-CVE-2018-0735) @@ -0,0 +1,33 @@ +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 #7486) + +(cherry picked from commit 99540ec) + +https://www.openssl.org/news/secadv/20181029.txt +--- crypto/ec/ec_mult.c.orig 2018-08-14 12:45:07 UTC ++++ crypto/ec/ec_mult.c +@@ -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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