Please note that: OpenSSL upstream security level 3 only allows TLS v1.1 and above OpenSSL upstream security level 4 only allows TLS v1.2 and above, DTLS v1.2 and above
On Ubuntu, these restrictions are brought in earlier at security level 2. Thus, if one builds upstream OpenSSL with security level set to 4 all of the above testsuite should be failing as well. I feel there is lack of API documentation about this in OpenSSL. Also, Python tests are incomplete and are not testing for, or setting appropriate security levels for the protocols they are attempting to use. Thus are not using the OpenSSL api correctly and making assumptions about the openssl library that are out of date with current standards and requirements. -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to openssl in Ubuntu. https://bugs.launchpad.net/bugs/1917625 Title: OpenSSL TLS 1.1 handshake fails internal error Status in openssl package in Ubuntu: Confirmed Status in openssl source package in Hirsute: Confirmed Bug description: OpenSSL's SSL_do_handshake() method fails with TLSV1_ALERT_INTERNAL_ERROR when client side has TLS 1.0 to 1.2 enabled but server side has only TLS 1.0 and 1.1 enabled. The issue breaks Python's test suite for test_ssl. It looks like the problem is caused by an Ubuntu downstream patch. Vanilla OpenSSL, Debian, and Fedora are not affected. A simple reproducer is: import ssl import socket from test.test_ssl import testing_context, ThreadedEchoServer, HOST client_context, server_context, hostname = testing_context() # client 1.0 to 1.2, server 1.0 to 1.1 client_context.minimum_version = ssl.TLSVersion.TLSv1 client_context.maximum_version = ssl.TLSVersion.TLSv1_2 server_context.minimum_version = ssl.TLSVersion.TLSv1 server_context.maximum_version = ssl.TLSVersion.TLSv1_1 with ThreadedEchoServer(context=server_context) as server: with client_context.wrap_socket(socket.socket(), server_hostname=hostname) as s: s.connect((HOST, server.port)) assert s.version() == 'TLSv1.1' On Ubuntu 20.04 the code fails with: Traceback (most recent call last): File "/internalerror.py", line 15, in <module> s.connect((HOST, server.port)) File "/usr/lib/python3.8/ssl.py", line 1342, in connect self._real_connect(addr, False) File "/usr/lib/python3.8/ssl.py", line 1333, in _real_connect self.do_handshake() File "/usr/lib/python3.8/ssl.py", line 1309, in do_handshake self._sslobj.do_handshake() ssl.SSLError: [SSL: TLSV1_ALERT_INTERNAL_ERROR] tlsv1 alert internal error (_ssl.c:1123) On Debian testing and Fedora 33 the same test passes with out: server: new connection from ('127.0.0.1', 52346) server: connection cipher is now ('ECDHE-RSA-AES256-SHA', 'TLSv1.0', 256) server: selected protocol is now None You can find Dockerfiles with reproducers at https://github.com/tiran /distro-truststore/tree/main/tests/ubuntu-1899878 Also see: * https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1899878 * https://bugs.python.org/issue43382 * https://bugs.python.org/issue41561 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1917625/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp
