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_25.1.0.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..59452c168e --- /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 | 1 + + src/OpenSSL/SSL.py | 7 ++++++- + tests/test_ssl.py | 50 ++++++++++++++++++++++++++++++++++++++++++++++ + 3 files changed, 57 insertions(+), 1 deletion(-) + +diff --git a/CHANGELOG.rst b/CHANGELOG.rst +index d98901f..5d953c9 100644 +--- a/CHANGELOG.rst ++++ b/CHANGELOG.rst +@@ -37,6 +37,7 @@ Changes: + + - Corrected type annotations on ``Context.set_alpn_select_callback``, ``Context.set_session_cache_mode``, ``Context.set_options``, ``Context.set_mode``, ``X509.subject_name_hash``, and ``X509Store.load_locations``. + - Deprecated APIs are now marked using ``warnings.deprecated``. ``mypy`` will emit deprecation notices for them when used with ``--enable-error-code deprecated``. ++- ``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. + + 24.3.0 (2024-11-27) + ------------------- +diff --git a/src/OpenSSL/SSL.py b/src/OpenSSL/SSL.py +index ca8913c..178961f 100644 +--- a/src/OpenSSL/SSL.py ++++ b/src/OpenSSL/SSL.py +@@ -2,6 +2,7 @@ from __future__ import annotations + + import os + import socket ++import sys + import typing + import warnings + from collections.abc import Sequence +@@ -1729,7 +1730,11 @@ class Context: + + @wraps(callback) + def wrapper(ssl, alert, arg): # type: ignore[no-untyped-def] +- 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 bcad6d9..9a5b19b 100644 +--- a/tests/test_ssl.py ++++ b/tests/test_ssl.py +@@ -1929,6 +1929,56 @@ class TestServerNameCallback: + + 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: + """ +-- +2.43.0 + diff --git a/meta/recipes-devtools/python/python3-pyopenssl_25.1.0.bb b/meta/recipes-devtools/python/python3-pyopenssl_25.1.0.bb index c1f571c552..25263629a4 100644 --- a/meta/recipes-devtools/python/python3-pyopenssl_25.1.0.bb +++ b/meta/recipes-devtools/python/python3-pyopenssl_25.1.0.bb @@ -9,6 +9,10 @@ SRC_URI[sha256sum] = "8d031884482e0c67ee92bf9a4d8cceb08d92aba7136432ffb0703c5280 inherit pypi setuptools3 +SRC_URI += " \ + file://CVE-2026-27448.patch \ +" + PACKAGES =+ "${PN}-tests" FILES:${PN}-tests = "${libdir}/${PYTHON_DIR}/site-packages/OpenSSL/test" -- 2.43.0
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