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
The DEFAULT cipher list is now ("openssl ciphers -v"):
ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384 ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256 ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384 ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256 DHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(256) Mac=AEAD DHE-RSA-AES256-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(256) Mac=SHA256 DHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AESGCM(128) Mac=AEAD DHE-RSA-AES128-SHA256 TLSv1.2 Kx=DH Au=RSA Enc=AES(128) Mac=SHA256 ECDHE-ECDSA-AES256-SHA SSLv3 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA1 ECDHE-ECDSA-AES128-SHA SSLv3 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA1 ECDHE-RSA-AES256-SHA SSLv3 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA1 ECDHE-RSA-AES128-SHA SSLv3 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-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(256) Mac=SHA256 AES128-GCM-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AESGCM(128) Mac=AEAD AES128-SHA256 TLSv1.2 Kx=RSA Au=RSA Enc=AES(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).
Signed-off-by: Peter Müller peter.mueller@link38.eu Cc: Michael Tremer michael.tremer@ipfire.org --- lfs/openssl | 2 +- src/patches/openssl-1.0.2n-weak-ciphers.patch | 12 ++++++++++++ 2 files changed, 13 insertions(+), 1 deletion(-) create mode 100644 src/patches/openssl-1.0.2n-weak-ciphers.patch
diff --git a/lfs/openssl b/lfs/openssl index 6050768ec..65d738d0f 100644 --- a/lfs/openssl +++ b/lfs/openssl @@ -126,7 +126,7 @@ $(TARGET) : $(patsubst %,$(DIR_DL)/%,$(objects)) @rm -rf $(DIR_APP) && cd $(DIR_SRC) && tar zxf $(DIR_DL)/$(DL_FILE) cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.0-beta5-enginesdir.patch cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.2a-rpmbuild.patch - cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.2h-weak-ciphers.patch + cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.2n-weak-ciphers.patch cd $(DIR_APP) && patch -Np1 < $(DIR_SRC)/src/patches/openssl-1.0.2g-disable-sslv2v3.patch
# i586 specific patches diff --git a/src/patches/openssl-1.0.2n-weak-ciphers.patch b/src/patches/openssl-1.0.2n-weak-ciphers.patch new file mode 100644 index 000000000..9fb4051e3 --- /dev/null +++ b/src/patches/openssl-1.0.2n-weak-ciphers.patch @@ -0,0 +1,12 @@ +diff -Naur openssl-1.0.2n-orig/ssl/ssl.h openssl-1.0.2n/ssl/ssl.h +--- openssl-1.0.2n-orig/ssl/ssl.h 2017-12-07 14:16:42.000000000 +0100 ++++ openssl-1.0.2n/ssl/ssl.h 2018-01-20 11:56:02.477927590 +0100 +@@ -338,7 +338,7 @@ + * 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:!EXPORT:!LOW:!aNULL:!eNULL:!SSLv2" ++# 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