import CS python-cryptography-3.2.1-6.el8

SOURCES/0006-CVE-2023-23931.patch

@@ -0,0 +1,42 @@
+From 94a50a9731f35405f0357fa5f3b177d46a726ab3 Mon Sep 17 00:00:00 2001
+From: Alex Gaynor <alex.gaynor@gmail.com>
+Date: Tue, 31 Jan 2023 08:33:54 -0500
+Subject: [PATCH] Don't allow update_into to mutate immutable objects
+
+---
+ src/cryptography/hazmat/backends/openssl/ciphers.py | 2 +-
+ tests/hazmat/primitives/test_ciphers.py             | 8 ++++++++
+ 2 files changed, 9 insertions(+), 1 deletion(-)
+
+diff --git a/src/cryptography/hazmat/backends/openssl/ciphers.py b/src/cryptography/hazmat/backends/openssl/ciphers.py
+index 286583f9325..075d68fb905 100644
+--- a/src/cryptography/hazmat/backends/openssl/ciphers.py
++++ b/src/cryptography/hazmat/backends/openssl/ciphers.py
+@@ -156,7 +156,7 @@ def update_into(self, data: bytes, buf: bytes) -> int:
+         data_processed = 0
+         total_out = 0
+         outlen = self._backend._ffi.new("int *")
+-        baseoutbuf = self._backend._ffi.from_buffer(buf)
++        baseoutbuf = self._backend._ffi.from_buffer(buf, require_writable=True)
+         baseinbuf = self._backend._ffi.from_buffer(data)
+ 
+         while data_processed != total_data_len:
+diff --git a/tests/hazmat/primitives/test_ciphers.py b/tests/hazmat/primitives/test_ciphers.py
+index 02127dd9cab..bf3b047dec2 100644
+--- a/tests/hazmat/primitives/test_ciphers.py
++++ b/tests/hazmat/primitives/test_ciphers.py
+@@ -318,6 +318,14 @@ def test_update_into_buffer_too_small(self, backend):
+         with pytest.raises(ValueError):
+             encryptor.update_into(b"testing", buf)
+ 
++    def test_update_into_immutable(self, backend):
++        key = b"\x00" * 16
++        c = ciphers.Cipher(AES(key), modes.ECB(), backend)
++        encryptor = c.encryptor()
++        buf = b"\x00" * 32
++        with pytest.raises((TypeError, BufferError)):
++            encryptor.update_into(b"testing", buf)
++
+     @pytest.mark.supported(
+         only_if=lambda backend: backend.cipher_supported(
+             AES(b"\x00" * 16), modes.GCM(b"\x00" * 12)

SPECS/python-cryptography.spec

@@ -1,10 +1,12 @@
 %{!?python3_pkgversion:%global python3_pkgversion 3}
 
 %global srcname cryptography
+# rhbz#2172416: from_buffer(..., require_writable=True)
+%global cffi_version 1.11.5-6
 
 Name:           python-%{srcname}
 Version:        3.2.1
-Release:        5%{?dist}
+Release:        6%{?dist}
 Summary:        PyCA's cryptography library
 
 Group:          Development/Libraries
@@ -17,6 +19,8 @@ Patch0002:      0002-Support-pytest-3.4.2.patch
 Patch0003:	0003-Skip-iso8601-test-cases.patch
 Patch0004:	0004-Revert-remove-NPN-bindings.patch
 Patch0005:	0005-CVE-2020-36242.patch
+# https://github.com/pyca/cryptography/pull/8230
+Patch0006:		0006-CVE-2023-23931.patch
 
 BuildRequires:  openssl-devel
 BuildRequires:  gcc
@@ -29,7 +33,7 @@ BuildRequires:  python%{python3_pkgversion}-pretend
 BuildRequires:  python%{python3_pkgversion}-cryptography-vectors = %{version}
 BuildRequires:  python%{python3_pkgversion}-pytz
 BuildRequires:  python%{python3_pkgversion}-six >= 1.4.1
-BuildRequires:  python%{python3_pkgversion}-cffi >= 1.7
+BuildRequires:  python%{python3_pkgversion}-cffi >= %{cffi_version}
 
 %description
 cryptography is a package designed to expose cryptographic primitives and
@@ -42,7 +46,7 @@ Summary:        PyCA's cryptography library
 
 Requires:       openssl-libs
 Requires:       python%{python3_pkgversion}-six >= 1.4.1
-Requires:       python%{python3_pkgversion}-cffi >= 1.7
+Requires:       python%{python3_pkgversion}-cffi >= %{cffi_version}
 Conflicts:      python%{python3_pkgversion}-cryptography-vectors < %{version}
 Conflicts:      python%{python3_pkgversion}-cryptography-vectors > %{version}
 
@@ -82,6 +86,9 @@ PYTHONPATH=%{buildroot}%{python3_sitearch} %{__python3} -m pytest
 
 
 %changelog
+* Wed Feb 22 2023 Christian Heimes <cheimes@redhat.com> - 3.2.1-6
+- Fix CVE-2023-23931: Don't allow update_into to mutate immutable objects, resolves rhbz#2172404
+
 * Tue Jun 08 2021 Christian Heimes <cheimes@redhat.com> - 3.2.1-5
 - Rebuild for RHEL 8.5
 - Resolves: rhbz#1933071