From: Vijay Anusuri <[email protected]> Pick patch mentioned in NVD
[1] https://nvd.nist.gov/vuln/detail/CVE-2026-27448 [2] https://ubuntu.com/security/CVE-2026-27448 Signed-off-by: Vijay Anusuri <[email protected]> --- .../python3-pyopenssl/CVE-2026-27448.patch | 125 ++++++++++++++++++ .../python/python3-pyopenssl_22.0.0.bb | 4 + 2 files changed, 129 insertions(+) create mode 100644 meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch diff --git a/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch new file mode 100644 index 0000000000..4a06e2c020 --- /dev/null +++ b/meta/recipes-devtools/python/python3-pyopenssl/CVE-2026-27448.patch @@ -0,0 +1,125 @@ +From d41a814759a9fb49584ca8ab3f7295de49a85aa0 Mon Sep 17 00:00:00 2001 +From: Alex Gaynor <[email protected]> +Date: Mon, 16 Feb 2026 21:04:37 -0500 +Subject: [PATCH] Handle exceptions in set_tlsext_servername_callback callbacks + (#1478) + +When the servername callback raises an exception, call sys.excepthook +with the exception info and return SSL_TLSEXT_ERR_ALERT_FATAL to abort +the handshake. Previously, exceptions would propagate uncaught through +the CFFI callback boundary. + +https://claude.ai/code/session_01P7y1XmWkdtC5UcmZwGDvGi + +Co-authored-by: Claude <[email protected]> + +Upstream-Status: Backport [https://github.com/pyca/pyopenssl/commit/d41a814759a9fb49584ca8ab3f7295de49a85aa0] +CVE: CVE-2026-27448 +Signed-off-by: Vijay Anusuri <[email protected]> +--- + CHANGELOG.rst | 2 ++ + src/OpenSSL/SSL.py | 7 ++++++- + tests/test_ssl.py | 50 ++++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 58 insertions(+), 1 deletion(-) + +diff --git a/CHANGELOG.rst b/CHANGELOG.rst +index c84b30a..5b6d523 100644 +--- a/CHANGELOG.rst ++++ b/CHANGELOG.rst +@@ -20,6 +20,8 @@ Deprecations: + Changes: + ^^^^^^^^ + ++- ``Context.set_tlsext_servername_callback`` now handles exceptions raised in the callback by calling ``sys.excepthook`` and returning a fatal TLS alert. Previously, exceptions were silently swallowed and the handshake would proceed as if the callback had succeeded. ++ + - Expose wrappers for some `DTLS + <https://en.wikipedia.org/wiki/Datagram_Transport_Layer_Security>`_ + primitives. `#1026 <https://github.com/pyca/pyopenssl/pull/1026>`_ +diff --git a/src/OpenSSL/SSL.py b/src/OpenSSL/SSL.py +index 12374b7..6ef44d4 100644 +--- a/src/OpenSSL/SSL.py ++++ b/src/OpenSSL/SSL.py +@@ -1,5 +1,6 @@ + import os + import socket ++import sys + from sys import platform + from functools import wraps, partial + from itertools import count, chain +@@ -1431,7 +1432,11 @@ class Context(object): + + @wraps(callback) + def wrapper(ssl, alert, arg): +- callback(Connection._reverse_mapping[ssl]) ++ try: ++ callback(Connection._reverse_mapping[ssl]) ++ except Exception: ++ sys.excepthook(*sys.exc_info()) ++ return _lib.SSL_TLSEXT_ERR_ALERT_FATAL + return 0 + + self._tlsext_servername_callback = _ffi.callback( +diff --git a/tests/test_ssl.py b/tests/test_ssl.py +index ccc8a38..77e1876 100644 +--- a/tests/test_ssl.py ++++ b/tests/test_ssl.py +@@ -1884,6 +1884,56 @@ class TestServerNameCallback(object): + + assert args == [(server, b"foo1.example.com")] + ++ def test_servername_callback_exception( ++ self, monkeypatch: pytest.MonkeyPatch ++ ) -> None: ++ """ ++ When the callback passed to `Context.set_tlsext_servername_callback` ++ raises an exception, ``sys.excepthook`` is called with the exception ++ and the handshake fails with an ``Error``. ++ """ ++ exc = TypeError("server name callback failed") ++ ++ def servername(conn: Connection) -> None: ++ raise exc ++ ++ excepthook_calls: list[ ++ tuple[type[BaseException], BaseException, object] ++ ] = [] ++ ++ def custom_excepthook( ++ exc_type: type[BaseException], ++ exc_value: BaseException, ++ exc_tb: object, ++ ) -> None: ++ excepthook_calls.append((exc_type, exc_value, exc_tb)) ++ ++ context = Context(SSLv23_METHOD) ++ context.set_tlsext_servername_callback(servername) ++ ++ # Necessary to actually accept the connection ++ context.use_privatekey(load_privatekey(FILETYPE_PEM, server_key_pem)) ++ context.use_certificate( ++ load_certificate(FILETYPE_PEM, server_cert_pem) ++ ) ++ ++ # Do a little connection to trigger the logic ++ server = Connection(context, None) ++ server.set_accept_state() ++ ++ client = Connection(Context(SSLv23_METHOD), None) ++ client.set_connect_state() ++ client.set_tlsext_host_name(b"foo1.example.com") ++ ++ monkeypatch.setattr(sys, "excepthook", custom_excepthook) ++ with pytest.raises(Error): ++ interact_in_memory(server, client) ++ ++ assert len(excepthook_calls) == 1 ++ assert excepthook_calls[0][0] is TypeError ++ assert excepthook_calls[0][1] is exc ++ assert excepthook_calls[0][2] is not None ++ + + class TestApplicationLayerProtoNegotiation(object): + """ +-- +2.25.1 + diff --git a/meta/recipes-devtools/python/python3-pyopenssl_22.0.0.bb b/meta/recipes-devtools/python/python3-pyopenssl_22.0.0.bb index db0e809ef5..13d87939b6 100644 --- a/meta/recipes-devtools/python/python3-pyopenssl_22.0.0.bb +++ b/meta/recipes-devtools/python/python3-pyopenssl_22.0.0.bb @@ -10,6 +10,10 @@ SRC_URI[sha256sum] = "660b1b1425aac4a1bea1d94168a85d99f0b3144c869dd4390d27629d00 PYPI_PACKAGE = "pyOpenSSL" inherit pypi setuptools3 +SRC_URI += " \ + file://CVE-2026-27448.patch \ +" + PACKAGES =+ "${PN}-tests" FILES:${PN}-tests = "${libdir}/${PYTHON_DIR}/site-packages/OpenSSL/test" -- 2.25.1
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