Date: Sun, 12 Jun 2016 21:29:58 +0000 (UTC) From: Dirk Meyer <dinoex@FreeBSD.org> To: ports-committers@freebsd.org, svn-ports-all@freebsd.org, svn-ports-head@freebsd.org Subject: svn commit: r416823 - in head/security/openssl: . files Message-ID: <201606122129.u5CLTwvq063421@repo.freebsd.org>
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Author: dinoex Date: Sun Jun 12 21:29:57 2016 New Revision: 416823 URL: https://svnweb.freebsd.org/changeset/ports/416823 Log: - Fix DSA, preserve BN_FLG_CONSTTIME Security: CVE-2016-2178 Added: head/security/openssl/files/patch-dsa_ossl.c (contents, props changed) Modified: head/security/openssl/Makefile Modified: head/security/openssl/Makefile ============================================================================== --- head/security/openssl/Makefile Sun Jun 12 20:49:19 2016 (r416822) +++ head/security/openssl/Makefile Sun Jun 12 21:29:57 2016 (r416823) @@ -4,7 +4,7 @@ PORTNAME= openssl PORTVERSION= 1.0.2 DISTVERSIONSUFFIX= h -PORTREVISION= 12 +PORTREVISION= 13 CATEGORIES= security devel MASTER_SITES= http://www.openssl.org/source/ \ ftp://ftp.openssl.org/source/ \ Added: head/security/openssl/files/patch-dsa_ossl.c ============================================================================== --- /dev/null 00:00:00 1970 (empty, because file is newly added) +++ head/security/openssl/files/patch-dsa_ossl.c Sun Jun 12 21:29:57 2016 (r416823) @@ -0,0 +1,35 @@ + +Fix DSA, preserve BN_FLG_CONSTTIME + +Operations in the DSA signing algorithm should run in constant time in +order to avoid side channel attacks. A flaw in the OpenSSL DSA +implementation means that a non-constant time codepath is followed for +certain operations. This has been demonstrated through a cache-timing +attack to be sufficient for an attacker to recover the private DSA key. + +CVE-2016-2178 + +--- crypto/dsa/dsa_ossl.c.orig 2016-05-03 15:44:42.000000000 +0200 ++++ crypto/dsa/dsa_ossl.c 2016-06-12 22:57:49.000000000 +0200 +@@ -248,9 +248,6 @@ + if (!BN_rand_range(&k, dsa->q)) + goto err; + while (BN_is_zero(&k)) ; +- if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) { +- BN_set_flags(&k, BN_FLG_CONSTTIME); +- } + + if (dsa->flags & DSA_FLAG_CACHE_MONT_P) { + if (!BN_MONT_CTX_set_locked(&dsa->method_mont_p, +@@ -282,6 +279,11 @@ + } else { + K = &k; + } ++ ++ if ((dsa->flags & DSA_FLAG_NO_EXP_CONSTTIME) == 0) { ++ BN_set_flags(&k, BN_FLG_CONSTTIME); ++ } ++ + DSA_BN_MOD_EXP(goto err, dsa, r, dsa->g, K, dsa->p, ctx, + dsa->method_mont_p); + if (!BN_mod(r, r, dsa->q, ctx))
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