From 0fff5065884d5ac61123a604bbcee30a53c808ff Mon Sep 17 00:00:00 2001
From: Rich Salz <rsalz@openssl.org>
Date: Thu, 18 Aug 2016 09:26:52 -0400
Subject: [PATCH] SWEET32 (CVE-2016-2183): Move DES from HIGH to MEDIUM
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Reviewed-by: Viktor Dukhovni <viktor@openssl.org>
Reviewed-by: Emilia Käsper <emilia@openssl.org>
---
 CHANGES      |  4 ++++
 ssl/s3_lib.c | 34 +++++++++++++++++-----------------
 2 files changed, 21 insertions(+), 17 deletions(-)

diff --git a/CHANGES b/CHANGES
index c3d3d7aab1..6502fc3efc 100644
--- a/CHANGES
+++ b/CHANGES
@@ -6,6 +6,10 @@
 
   *)
 
+  *) In order to mitigate the SWEET32 attack (CVE-2016-2183),
+     the DES ciphers were moved from HIGH to MEDIUM.
+     [Rich Salz]
+
  Changes between 1.0.2g and 1.0.2h [3 May 2016]
 
   *) Prevent padding oracle in AES-NI CBC MAC check
diff --git a/ssl/s3_lib.c b/ssl/s3_lib.c
index f2aaf36c40..0385e039c8 100644
--- a/ssl/s3_lib.c
+++ b/ssl/s3_lib.c
@@ -329,7 +329,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -382,7 +382,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -434,7 +434,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -487,7 +487,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -539,7 +539,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -625,7 +625,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -712,7 +712,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -778,7 +778,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_MD5,
      SSL_SSLV3,
-     SSL_NOT_EXP | SSL_HIGH,
+     SSL_NOT_EXP | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -1728,7 +1728,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2120,7 +2120,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2200,7 +2200,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2280,7 +2280,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2360,7 +2360,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2440,7 +2440,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_HIGH | SSL_FIPS,
+     SSL_NOT_DEFAULT | SSL_NOT_EXP | SSL_MEDIUM | SSL_FIPS,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2490,7 +2490,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH,
+     SSL_NOT_EXP | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2506,7 +2506,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH,
+     SSL_NOT_EXP | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
@@ -2522,7 +2522,7 @@ OPENSSL_GLOBAL SSL_CIPHER ssl3_ciphers[] = {
      SSL_3DES,
      SSL_SHA1,
      SSL_TLSV1,
-     SSL_NOT_EXP | SSL_HIGH,
+     SSL_NOT_EXP | SSL_MEDIUM,
      SSL_HANDSHAKE_MAC_DEFAULT | TLS1_PRF,
      112,
      168,
-- 
2.25.1