Only use secure cipher list for the OpenSSL DEFAULT list: * ECDSA is preferred over RSA since it is faster and more scalable * TLS 1.2 suites are preferred over anything older * weak ciphers such as RC4 and 3DES have been eliminated * AES-GCM is preferred over AES-CBC (known as "mac-then-encrypt" problem) * ciphers without PFS are moved to the end of the cipher list
This patch leaves AES-CCM, AES-CCM8 and CHACHA20-POLY1305 suites where they are since they are considered secure and there is no need to change anything.
The DEFAULT cipher list is now (output of "openssl ciphers -v"):
ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD ECDHE-ECDSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH Au=ECDSA Enc=CHACHA20/POLY1305(256) Mac=AEAD ECDHE-ECDSA-AES256-CCM8 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESCCM8(256) Mac=AEAD ECDHE-ECDSA-AES256-CCM TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESCCM(256) Mac=AEAD ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD ECDHE-ECDSA-AES128-CCM8 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESCCM8(128) Mac=AEAD ECDHE-ECDSA-AES128-CCM TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESCCM(128) Mac=AEAD ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384 ECDHE-ECDSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=Camellia(256) Mac=SHA384 ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256 ECDHE-ECDSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=Camellia(128) Mac=SHA256 ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD ECDHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=ECDH Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384 ECDHE-RSA-CAMELLIA256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=Camellia(256) Mac=SHA384 ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256 ECDHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=Camellia(128) Mac=SHA256 DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(256) Mac=AEAD DHE-RSA-CHACHA20-POLY1305 TLSv1.2 Kx=DH Au=RSA Enc=CHACHA20/POLY1305(256) Mac=AEAD DHE-RSA-AES256-CCM8 TLSv1.2 Kx=DH Au=RSA Enc=AESCCM8(256) Mac=AEAD DHE-RSA-AES256-CCM TLSv1.2 Kx=DH Au=RSA Enc=AESCCM(256) Mac=AEAD DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(128) Mac=AEAD DHE-RSA-AES128-CCM8 TLSv1.2 Kx=DH Au=RSA Enc=AESCCM8(128) Mac=AEAD DHE-RSA-AES128-CCM TLSv1.2 Kx=DH Au=RSA Enc=AESCCM(128) Mac=AEAD DHE-RSA-AES256-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(256) Mac=SHA256 DHE-RSA-CAMELLIA256-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=Camellia(256) Mac=SHA256 DHE-RSA-AES128-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(128) Mac=SHA256 DHE-RSA-CAMELLIA128-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=Camellia(128) Mac=SHA256 ECDHE-ECDSA-AES256-SHA TLSv1 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA1 ECDHE-ECDSA-AES128-SHA TLSv1 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA1 ECDHE-RSA-AES256-SHA TLSv1 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA1 ECDHE-RSA-AES128-SHA TLSv1 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA1 DHE-RSA-AES256-SHA SSLv3 Kx=DH Au=RSA Enc=AES(256) Mac=SHA1 DHE-RSA-CAMELLIA256-SHA SSLv3 Kx=DH Au=RSA Enc=Camellia(256) Mac=SHA1 DHE-RSA-AES128-SHA SSLv3 Kx=DH Au=RSA Enc=AES(128) Mac=SHA1 DHE-RSA-CAMELLIA128-SHA SSLv3 Kx=DH Au=RSA Enc=Camellia(128) Mac=SHA1 AES256-GCM-SHA384 TLSv1.2 Kx=RSA Au=RSA Enc=AESGCM(256) Mac=AEAD AES256-CCM8 TLSv1.2 Kx=RSA Au=RSA Enc=AESCCM8(256) Mac=AEAD AES256-CCM TLSv1.2 Kx=RSA Au=RSA Enc=AESCCM(256) Mac=AEAD AES128-GCM-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AESGCM(128) Mac=AEAD AES128-CCM8 TLSv1.2 Kx=RSA Au=RSA Enc=AESCCM8(128) Mac=AEAD AES128-CCM TLSv1.2 Kx=RSA Au=RSA Enc=AESCCM(128) Mac=AEAD AES256-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA256 CAMELLIA256-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=Camellia(256) Mac=SHA256 AES128-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(128) Mac=SHA256 CAMELLIA128-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=Camellia(128) Mac=SHA256 AES256-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA1 CAMELLIA256-SHA SSLv3 Kx=RSA Au=RSA Enc=Camellia(256) Mac=SHA1 AES128-SHA SSLv3 Kx=RSA Au=RSA Enc=AES(128) Mac=SHA1 CAMELLIA128-SHA SSLv3 Kx=RSA Au=RSA Enc=Camellia(128) Mac=SHA1
This has been discussed at 2017-12-04 (https://wiki.ipfire.org/devel/telco/2017-12-04) and for a similar patch written for OpenSSL 1.0.x.
Signed-off-by: Peter Müller peter.mueller@link38.eu --- lfs/openssl | 3 +++ src/patches/openssl-1.1.0g-weak-ciphers.patch | 11 +++++++++++ 2 files changed, 14 insertions(+) create mode 100644 src/patches/openssl-1.1.0g-weak-ciphers.patch
diff --git a/lfs/openssl b/lfs/openssl index bd7098039..6e17e79e6 100644 --- a/lfs/openssl +++ b/lfs/openssl @@ -131,6 +131,9 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects)) cd $(DIR_APP) && ./Configure $(CONFIGURE_OPTIONS) \ $(CFLAGS) $(LDFLAGS)
+ # Apply patch for changing DEFAULT cipher list (needed after configure) + cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.1.0g-weak-ciphers.patch + cd $(DIR_APP) && make depend cd $(DIR_APP) && make
diff --git a/src/patches/openssl-1.1.0g-weak-ciphers.patch b/src/patches/openssl-1.1.0g-weak-ciphers.patch new file mode 100644 index 000000000..66dad2bee --- /dev/null +++ b/src/patches/openssl-1.1.0g-weak-ciphers.patch @@ -0,0 +1,11 @@ +--- openssl-1.1.0g-orig/include/openssl/ssl.h 2017-11-02 15:29:05.000000000 +0100 ++++ openssl-1.1.0g/include/openssl/ssl.h 2018-02-27 18:23:43.522649728 +0100 +@@ -194,7 +194,7 @@ + * The following cipher list is used by default. It also is substituted when + * an application-defined cipher list string starts with 'DEFAULT'. + */ +-# define SSL_DEFAULT_CIPHER_LIST "ALL:!COMPLEMENTOFDEFAULT:!eNULL" ++# define SSL_DEFAULT_CIPHER_LIST "kEECDH+ECDSA:kEECDH:kEDH:HIGH:+SHA:+kRSA:!aNULL:!eNULL:!LOW:!3DES:!MD5:!EXP:!PSK:!SRP:!kECDH:!IDEA:!SEED:!RC4:!kDH:!DSS" + /* + * As of OpenSSL 1.0.0, ssl_create_cipher_list() in ssl/ssl_ciph.c always + * starts with a reasonable order, and all we have to do for DEFAULT is