[OE-core] [ROCKO][PATCH 32/34] openssl: CVE-2018-0732

[Jagadeesh Krishnanjanappa]

Reject excessively large primes in DH key generation.

CVE-2018-0732

Affects openssl 1.0.2 to 1.0.2o

Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa at mvista.com>
---
 .../openssl/openssl-1.0.2o/CVE-2018-0732.patch     | 47 ++++++++++++++++++++++
 .../recipes-connectivity/openssl/openssl_1.0.2o.bb |  1 +
 2 files changed, 48 insertions(+)
 create mode 100644 meta/recipes-connectivity/openssl/openssl-1.0.2o/CVE-2018-0732.patch

diff --git a/meta/recipes-connectivity/openssl/openssl-1.0.2o/CVE-2018-0732.patch b/meta/recipes-connectivity/openssl/openssl-1.0.2o/CVE-2018-0732.patch
new file mode 100644
index 0000000..2796b05
--- /dev/null
+++ b/meta/recipes-connectivity/openssl/openssl-1.0.2o/CVE-2018-0732.patch
@@ -0,0 +1,47 @@
+From 3984ef0b72831da8b3ece4745cac4f8575b19098 Mon Sep 17 00:00:00 2001
+From: Guido Vranken <guidovranken at gmail.com>
+Date: Mon, 11 Jun 2018 19:38:54 +0200
+Subject: [PATCH] Reject excessively large primes in DH key generation.
+
+CVE-2018-0732
+
+Signed-off-by: Guido Vranken <guidovranken at gmail.com>
+
+(cherry picked from commit 91f7361f47b082ae61ffe1a7b17bb2adf213c7fe)
+
+Reviewed-by: Tim Hudson <tjh at openssl.org>
+Reviewed-by: Matt Caswell <matt at openssl.org>
+(Merged from https://github.com/openssl/openssl/pull/6457)
+
+CVE: CVE-2018-0732
+Upstream-Status: Backport [https://github.com/openssl/openssl/commit/ea7abeeabf92b7aca160bdd0208636d4da69f4f4]
+
+Signed-off-by: Jagadeesh Krishnanjanappa <jkrishnanjanappa at mvista.com>
+---
+ crypto/dh/dh_key.c | 7 ++++++-
+ 1 file changed, 6 insertions(+), 1 deletion(-)
+
+diff --git a/crypto/dh/dh_key.c b/crypto/dh/dh_key.c
+index 387558f146..f235e0d682 100644
+--- a/crypto/dh/dh_key.c
++++ b/crypto/dh/dh_key.c
+@@ -130,10 +130,15 @@ static int generate_key(DH *dh)
+     int ok = 0;
+     int generate_new_key = 0;
+     unsigned l;
+-    BN_CTX *ctx;
++    BN_CTX *ctx = NULL;
+     BN_MONT_CTX *mont = NULL;
+     BIGNUM *pub_key = NULL, *priv_key = NULL;
+ 
++    if (BN_num_bits(dh->p) > OPENSSL_DH_MAX_MODULUS_BITS) {
++        DHerr(DH_F_GENERATE_KEY, DH_R_MODULUS_TOO_LARGE);
++        return 0;
++    }
++
+     ctx = BN_CTX_new();
+     if (ctx == NULL)
+         goto err;
+-- 
+2.13.3
+
diff --git a/meta/recipes-connectivity/openssl/openssl_1.0.2o.bb b/meta/recipes-connectivity/openssl/openssl_1.0.2o.bb
index 413ebf3..57912a1 100644
--- a/meta/recipes-connectivity/openssl/openssl_1.0.2o.bb
+++ b/meta/recipes-connectivity/openssl/openssl_1.0.2o.bb
@@ -41,6 +41,7 @@ SRC_URI += "file://find.pl;subdir=openssl-${PV}/util/ \
            file://Use-SHA256-not-MD5-as-default-digest.patch \
            file://0001-Fix-build-with-clang-using-external-assembler.patch \
            file://0001-openssl-force-soft-link-to-avoid-rare-race.patch \
+           file://CVE-2018-0732.patch \
            "
 
 SRC_URI_append_class-target = "\
-- 
2.7.4