To be clear, the root issue is that the server is using an outdated, insecure protocol that has been deemed so for more than a decade, and OpenSSL finally decided to disable it by default. The "proper" way to fix this would be for them to upgrade.
Now, that being said, we live in the real world and our users probably don't have the power to make this decision. I really don't understand why the upstream Python PR has been closed, it'd have made our lives easier. We *could* carry the patch in our Python 3.10 package, but that's just moving the problem, as our more technical users would have this escape hatch but the others would still be left out. I'll get in touch with OpenSSL upstream to see if it's conceivable to expose this flag as a configuration option. -- 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/1963834 Title: openssl 3.0 - SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED] Status in openssl package in Ubuntu: New Bug description: Description: Ubuntu Jammy Jellyfish (development branch) Release: 22.04 openssl: Installé : 3.0.1-0ubuntu1 Candidat : 3.0.1-0ubuntu1 Table de version : *** 3.0.1-0ubuntu1 500 500 http://ca.archive.ubuntu.com/ubuntu jammy/main amd64 Packages 100 /var/lib/dpkg/status Using Ubuntu 22.04, I now get the following error message when attempting to connect to our office VPN using "gp-saml-gui (https://github.com/dlenski/gp-saml-gui)" : ######### dominique@Doombuntu:~$ .local/bin/gp-saml-gui server_url Looking for SAML auth tags in response to https://server_url/global-protect/prelogin.esp... usage: gp-saml-gui [-h] [--no-verify] [-C COOKIES | -K] [-g | -p] [-c CERT] [--key KEY] [-v | -q] [-x | -P | -S] [-u] [--clientos {Windows,Linux,Mac}] [-f EXTRA] server [openconnect_extra ...] gp-saml-gui: error: SSL error: [SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED] unsafe legacy renegotiation disabled (_ssl.c:997) ######### ######### ######### gp-saml-gui uses python module requests. Using python ide, I can get the same results : ######### >>> r = requests.get('https://server_url') Traceback (most recent call last): File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 699, in urlopen httplib_response = self._make_request( File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 382, in _make_request self._validate_conn(conn) File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 1012, in _validate_conn conn.connect() File "/usr/lib/python3/dist-packages/urllib3/connection.py", line 411, in connect self.sock = ssl_wrap_socket( File "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 449, in ssl_wrap_socket ssl_sock = _ssl_wrap_socket_impl( File "/usr/lib/python3/dist-packages/urllib3/util/ssl_.py", line 493, in _ssl_wrap_socket_impl return ssl_context.wrap_socket(sock, server_hostname=server_hostname) File "/usr/lib/python3.10/ssl.py", line 512, in wrap_socket return self.sslsocket_class._create( File "/usr/lib/python3.10/ssl.py", line 1070, in _create self.do_handshake() File "/usr/lib/python3.10/ssl.py", line 1341, in do_handshake self._sslobj.do_handshake() ssl.SSLError: [SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED] unsafe legacy renegotiation disabled (_ssl.c:997) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "/usr/lib/python3/dist-packages/requests/adapters.py", line 439, in send resp = conn.urlopen( File "/usr/lib/python3/dist-packages/urllib3/connectionpool.py", line 755, in urlopen retries = retries.increment( File "/usr/lib/python3/dist-packages/urllib3/util/retry.py", line 574, in increment raise MaxRetryError(_pool, url, error or ResponseError(cause)) urllib3.exceptions.MaxRetryError: HTTPSConnectionPool(host='server_url', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, '[SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED] unsafe legacy renegotiation disabled (_ssl.c:997)'))) During handling of the above exception, another exception occurred: Traceback (most recent call last): File "<stdin>", line 1, in <module> File "/usr/lib/python3/dist-packages/requests/api.py", line 76, in get return request('get', url, params=params, **kwargs) File "/usr/lib/python3/dist-packages/requests/api.py", line 61, in request return session.request(method=method, url=url, **kwargs) File "/usr/lib/python3/dist-packages/requests/sessions.py", line 542, in request resp = self.send(prep, **send_kwargs) File "/usr/lib/python3/dist-packages/requests/sessions.py", line 655, in send r = adapter.send(request, **kwargs) File "/usr/lib/python3/dist-packages/requests/adapters.py", line 514, in send raise SSLError(e, request=request) requests.exceptions.SSLError: HTTPSConnectionPool(host='server_url', port=443): Max retries exceeded with url: / (Caused by SSLError(SSLError(1, '[SSL: UNSAFE_LEGACY_RENEGOTIATION_DISABLED] unsafe legacy renegotiation disabled (_ssl.c:997)'))) ######### ######### ######### I believe in OpenSSL 3.0 that SSL_OP_LEGACY_SERVER_CONNECT is now disabled by default, as opposed to the version used in earlier Ubuntu versions (tested to work fine with 20.04 and 21.10). I can't tell what should be done here. Is there something I can do to allow enable "SSL_OP_LEGACY_SERVER_CONNECT" for this connection ? Can something be done in the python module, or does this require a change in or parameter or config to be set in OpenSSL ? To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/openssl/+bug/1963834/+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
