From 3b4386dd19b7e669f557c95ace8d7ba228291927 Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Tue, 7 Nov 2017 18:34:34 +0100 Subject: ssl: Countermeasurements for Bleichenbacher attack --- lib/ssl/src/dtls_connection.erl | 1 + lib/ssl/src/ssl_connection.erl | 21 +++++++++++++++++++-- lib/ssl/src/ssl_connection.hrl | 1 + lib/ssl/src/tls_connection.erl | 1 + 4 files changed, 22 insertions(+), 2 deletions(-) diff --git a/lib/ssl/src/dtls_connection.erl b/lib/ssl/src/dtls_connection.erl index 745db788e7..130a8bb1c5 100644 --- a/lib/ssl/src/dtls_connection.erl +++ b/lib/ssl/src/dtls_connection.erl @@ -575,6 +575,7 @@ handle_client_hello(#client_hello{client_version = ClientVersion} = Hello, State = prepare_flight(State0#state{connection_states = ConnectionStates, negotiated_version = Version, + client_hello_version = ClientVersion, hashsign_algorithm = HashSign, session = Session, negotiated_protocol = Protocol}), diff --git a/lib/ssl/src/ssl_connection.erl b/lib/ssl/src/ssl_connection.erl index ad220ae9de..0e51106bfb 100644 --- a/lib/ssl/src/ssl_connection.erl +++ b/lib/ssl/src/ssl_connection.erl @@ -1367,8 +1367,25 @@ server_certify_and_key_exchange(State0, Connection) -> request_client_cert(State2, Connection). certify_client_key_exchange(#encrypted_premaster_secret{premaster_secret= EncPMS}, - #state{private_key = Key} = State, Connection) -> - PremasterSecret = ssl_handshake:premaster_secret(EncPMS, Key), + #state{private_key = Key, client_hello_version = {Major, Minor} = Version} = State, Connection) -> + + %% Countermeasure for Bleichenbacher attack always provide some kind of premaster secret + %% and fail handshake later.RFC 5246 section 7.4.7.1. + PremasterSecret = + try ssl_handshake:premaster_secret(EncPMS, Key) of + Secret when erlang:byte_size(Secret) == ?NUM_OF_PREMASTERSECRET_BYTES -> + case Secret of + <> -> %% Correct + Secret; + <> -> %% Version mismatch + <> + end; + _ -> %% erlang:byte_size(Secret) =/= ?NUM_OF_PREMASTERSECRET_BYTES + make_premaster_secret(Version, rsa) + catch + #alert{description = ?DECRYPT_ERROR} -> + make_premaster_secret(Version, rsa) + end, calculate_master_secret(PremasterSecret, State, Connection, certify, cipher); certify_client_key_exchange(#client_diffie_hellman_public{dh_public = ClientPublicDhKey}, diff --git a/lib/ssl/src/ssl_connection.hrl b/lib/ssl/src/ssl_connection.hrl index b597c059af..016cc4b525 100644 --- a/lib/ssl/src/ssl_connection.hrl +++ b/lib/ssl/src/ssl_connection.hrl @@ -57,6 +57,7 @@ session_cache_cb :: atom(), crl_db :: term(), negotiated_version :: ssl_record:ssl_version() | 'undefined', + client_hello_version :: ssl_record:ssl_version() | 'undefined', client_certificate_requested = false :: boolean(), key_algorithm :: ssl_cipher:key_algo(), hashsign_algorithm = {undefined, undefined}, diff --git a/lib/ssl/src/tls_connection.erl b/lib/ssl/src/tls_connection.erl index 831bbefc59..b18c69c740 100644 --- a/lib/ssl/src/tls_connection.erl +++ b/lib/ssl/src/tls_connection.erl @@ -280,6 +280,7 @@ hello(internal, #client_hello{client_version = ClientVersion} = Hello, gen_handshake(ssl_connection, hello, internal, {common_client_hello, Type, ServerHelloExt}, State#state{connection_states = ConnectionStates, negotiated_version = Version, + client_hello_version = ClientVersion, hashsign_algorithm = HashSign, session = Session, negotiated_protocol = Protocol}) -- cgit v1.2.3 From 91c707c99a0574677284a9ca225b5fb54375ad7a Mon Sep 17 00:00:00 2001 From: Ingela Anderton Andin Date: Thu, 9 Nov 2017 16:55:22 +0100 Subject: ssl: Prepare for release --- lib/ssl/src/ssl.appup.src | 2 -- lib/ssl/vsn.mk | 2 +- 2 files changed, 1 insertion(+), 3 deletions(-) diff --git a/lib/ssl/src/ssl.appup.src b/lib/ssl/src/ssl.appup.src index 2eda9d9491..bfdd0c205b 100644 --- a/lib/ssl/src/ssl.appup.src +++ b/lib/ssl/src/ssl.appup.src @@ -1,7 +1,6 @@ %% -*- erlang -*- {"%VSN%", [ - {<<"8.1.1">>, [{load_module, tls_connection, soft_purge, soft_purge, []}]}, {<<"8\\..*">>, [{restart_application, ssl}]}, {<<"7\\..*">>, [{restart_application, ssl}]}, {<<"6\\..*">>, [{restart_application, ssl}]}, @@ -10,7 +9,6 @@ {<<"3\\..*">>, [{restart_application, ssl}]} ], [ - {<<"8.1.1">>, [{load_module, tls_connection, soft_purge, soft_purge, []}]}, {<<"8\\..*">>, [{restart_application, ssl}]}, {<<"7\\..*">>, [{restart_application, ssl}]}, {<<"6\\..*">>, [{restart_application, ssl}]}, diff --git a/lib/ssl/vsn.mk b/lib/ssl/vsn.mk index 7c2d9bec48..1743a61cb7 100644 --- a/lib/ssl/vsn.mk +++ b/lib/ssl/vsn.mk @@ -1 +1 @@ -SSL_VSN = 8.1.3 +SSL_VSN = 8.1.3.1 -- cgit v1.2.3 From 4877ca714b473501c647eb24608bb6d28f80027a Mon Sep 17 00:00:00 2001 From: Erlang/OTP Date: Wed, 22 Nov 2017 15:55:47 +0100 Subject: Update release notes --- lib/ssl/doc/src/notes.xml | 54 +++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) diff --git a/lib/ssl/doc/src/notes.xml b/lib/ssl/doc/src/notes.xml index d13ad09470..d37a180f54 100644 --- a/lib/ssl/doc/src/notes.xml +++ b/lib/ssl/doc/src/notes.xml @@ -28,6 +28,60 @@

This document describes the changes made to the SSL application.

+
SSL 8.1.3.1 + +
Fixed Bugs and Malfunctions + + +

An erlang TLS server configured with cipher suites + using rsa key exchange, may be vulnerable to an Adaptive + Chosen Ciphertext attack (AKA Bleichenbacher attack) + against RSA, which when exploited, may result in + plaintext recovery of encrypted messages and/or a + Man-in-the-middle (MiTM) attack, despite the attacker not + having gained access to the server’s private key + itself. CVE-2017-1000385 +

Exploiting this vulnerability to perform + plaintext recovery of encrypted messages will, in most + practical cases, allow an attacker to read the plaintext + only after the session has completed. Only TLS sessions + established using RSA key exchange are vulnerable to this + attack.

Exploiting this vulnerability to conduct + a MiTM attack requires the attacker to complete the + initial attack, which may require thousands of server + requests, during the handshake phase of the targeted + session within the window of the configured handshake + timeout. This attack may be conducted against any TLS + session using RSA signatures, but only if cipher suites + using RSA key exchange are also enabled on the server. + The limited window of opportunity, limitations in + bandwidth, and latency make this attack significantly + more difficult to execute.

RSA key exchange is + enabled by default although least prioritized if server + order is honored. For such a cipher suite to be chosen it + must also be supported by the client and probably the + only shared cipher suite.

Captured TLS sessions + encrypted with ephemeral cipher suites (DHE or ECDHE) are + not at risk for subsequent decryption due to this + vulnerability.

As a workaround if default cipher + suite configuration was used you can configure the server + to not use vulnerable suites with the ciphers option like + this:

{ciphers, [Suite || Suite <- + ssl:cipher_suites(), element(1,Suite) =/= rsa]}

+ that is your code will look somethingh like this:

+ ssl:listen(Port, [{ciphers, [Suite || Suite <- + ssl:cipher_suites(), element(1,S) =/= rsa]} | Options]). +

Thanks to Hanno Böck, Juraj Somorovsky and + Craig Young for reporting this vulnerability.

+

+ Own Id: OTP-14748

+ + +
+ +
+
SSL 8.1.3
Fixed Bugs and Malfunctions -- cgit v1.2.3 From e64a1f429ec5f7534e0201fed42967aeb1aae8d8 Mon Sep 17 00:00:00 2001 From: Erlang/OTP Date: Wed, 22 Nov 2017 15:55:49 +0100 Subject: Updated OTP version --- OTP_VERSION | 2 +- otp_versions.table | 1 + 2 files changed, 2 insertions(+), 1 deletion(-) diff --git a/OTP_VERSION b/OTP_VERSION index 8e1f9c8981..668cef15cf 100644 --- a/OTP_VERSION +++ b/OTP_VERSION @@ -1 +1 @@ -19.3.6.3 +19.3.6.4 diff --git a/otp_versions.table b/otp_versions.table index 4b124668d1..fffbaa2468 100644 --- a/otp_versions.table +++ b/otp_versions.table @@ -1,3 +1,4 @@ +OTP-19.3.6.4 : ssl-8.1.3.1 # asn1-4.0.4 common_test-1.14 compiler-7.0.4.1 cosEvent-2.2.1 cosEventDomain-1.2.1 cosFileTransfer-1.2.1 cosNotification-1.2.2 cosProperty-1.2.1 cosTime-1.2.2 cosTransactions-1.3.2 crypto-3.7.4 debugger-4.2.1 dialyzer-3.1.1 diameter-1.12.2 edoc-0.8.1 eldap-1.2.2 erl_docgen-0.6.1 erl_interface-3.9.3 erts-8.3.5.3 et-1.6 eunit-2.3.2 gs-1.6.2 hipe-3.15.4 ic-4.4.2 inets-6.3.9 jinterface-1.7.1 kernel-5.2 megaco-3.18.1 mnesia-4.14.3 observer-2.3.1 odbc-2.12 orber-3.8.2 os_mon-2.4.2 otp_mibs-1.1.1 parsetools-2.1.4 percept-0.9 public_key-1.4 reltool-0.7.3 runtime_tools-1.11.1 sasl-3.0.3 snmp-5.2.5 ssh-4.4.2 stdlib-3.3 syntax_tools-2.1.1 tools-2.9.1 typer-0.9.12 wx-1.8 xmerl-1.3.14 : OTP-19.3.6.3 : compiler-7.0.4.1 erts-8.3.5.3 # asn1-4.0.4 common_test-1.14 cosEvent-2.2.1 cosEventDomain-1.2.1 cosFileTransfer-1.2.1 cosNotification-1.2.2 cosProperty-1.2.1 cosTime-1.2.2 cosTransactions-1.3.2 crypto-3.7.4 debugger-4.2.1 dialyzer-3.1.1 diameter-1.12.2 edoc-0.8.1 eldap-1.2.2 erl_docgen-0.6.1 erl_interface-3.9.3 et-1.6 eunit-2.3.2 gs-1.6.2 hipe-3.15.4 ic-4.4.2 inets-6.3.9 jinterface-1.7.1 kernel-5.2 megaco-3.18.1 mnesia-4.14.3 observer-2.3.1 odbc-2.12 orber-3.8.2 os_mon-2.4.2 otp_mibs-1.1.1 parsetools-2.1.4 percept-0.9 public_key-1.4 reltool-0.7.3 runtime_tools-1.11.1 sasl-3.0.3 snmp-5.2.5 ssh-4.4.2 ssl-8.1.3 stdlib-3.3 syntax_tools-2.1.1 tools-2.9.1 typer-0.9.12 wx-1.8 xmerl-1.3.14 : OTP-19.3.6.2 : erts-8.3.5.2 # asn1-4.0.4 common_test-1.14 compiler-7.0.4 cosEvent-2.2.1 cosEventDomain-1.2.1 cosFileTransfer-1.2.1 cosNotification-1.2.2 cosProperty-1.2.1 cosTime-1.2.2 cosTransactions-1.3.2 crypto-3.7.4 debugger-4.2.1 dialyzer-3.1.1 diameter-1.12.2 edoc-0.8.1 eldap-1.2.2 erl_docgen-0.6.1 erl_interface-3.9.3 et-1.6 eunit-2.3.2 gs-1.6.2 hipe-3.15.4 ic-4.4.2 inets-6.3.9 jinterface-1.7.1 kernel-5.2 megaco-3.18.1 mnesia-4.14.3 observer-2.3.1 odbc-2.12 orber-3.8.2 os_mon-2.4.2 otp_mibs-1.1.1 parsetools-2.1.4 percept-0.9 public_key-1.4 reltool-0.7.3 runtime_tools-1.11.1 sasl-3.0.3 snmp-5.2.5 ssh-4.4.2 ssl-8.1.3 stdlib-3.3 syntax_tools-2.1.1 tools-2.9.1 typer-0.9.12 wx-1.8 xmerl-1.3.14 : OTP-19.3.6.1 : erts-8.3.5.1 # asn1-4.0.4 common_test-1.14 compiler-7.0.4 cosEvent-2.2.1 cosEventDomain-1.2.1 cosFileTransfer-1.2.1 cosNotification-1.2.2 cosProperty-1.2.1 cosTime-1.2.2 cosTransactions-1.3.2 crypto-3.7.4 debugger-4.2.1 dialyzer-3.1.1 diameter-1.12.2 edoc-0.8.1 eldap-1.2.2 erl_docgen-0.6.1 erl_interface-3.9.3 et-1.6 eunit-2.3.2 gs-1.6.2 hipe-3.15.4 ic-4.4.2 inets-6.3.9 jinterface-1.7.1 kernel-5.2 megaco-3.18.1 mnesia-4.14.3 observer-2.3.1 odbc-2.12 orber-3.8.2 os_mon-2.4.2 otp_mibs-1.1.1 parsetools-2.1.4 percept-0.9 public_key-1.4 reltool-0.7.3 runtime_tools-1.11.1 sasl-3.0.3 snmp-5.2.5 ssh-4.4.2 ssl-8.1.3 stdlib-3.3 syntax_tools-2.1.1 tools-2.9.1 typer-0.9.12 wx-1.8 xmerl-1.3.14 : -- cgit v1.2.3