python3-flask: patch CVE-2023-30861

Details: https://nvd.nist.gov/vuln/detail/CVE-2023-30861

Pick the patch referenced by the NVD report.

Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>

meta-python/recipes-devtools/python/python3-flask/CVE-2023-30861.patch

@@ -0,0 +1,94 @@
+From 32cc429640d7307caa2075d15b0634fd886c6381 Mon Sep 17 00:00:00 2001
+From: David Lord <davidism@gmail.com>
+Date: Mon, 1 May 2023 08:01:32 -0700
+Subject: [PATCH] set `Vary: Cookie` header consistently for session
+
+CVE: CVE-2023-30861
+Upstream-Status: Backport [https://github.com/pallets/flask/commit/afd63b16170b7c047f5758eb910c416511e9c965]
+Signed-off-by: Gyorgy Sarvari <skandigraun@gmail.com>
+---
+ src/flask/sessions.py | 10 ++++++----
+ tests/test_basic.py   | 23 +++++++++++++++++++++++
+ 2 files changed, 29 insertions(+), 4 deletions(-)
+
+diff --git a/src/flask/sessions.py b/src/flask/sessions.py
+index 4e19270..039e30c 100644
+--- a/src/flask/sessions.py
++++ b/src/flask/sessions.py
+@@ -385,6 +385,10 @@ class SecureCookieSessionInterface(SessionInterface):
+         samesite = self.get_cookie_samesite(app)
+         httponly = self.get_cookie_httponly(app)
+ 
++        # Add a "Vary: Cookie" header if the session was accessed at all.
++        if session.accessed:
++            response.vary.add("Cookie")
++
+         # If the session is modified to be empty, remove the cookie.
+         # If the session is empty, return without setting the cookie.
+         if not session:
+@@ -397,13 +401,10 @@ class SecureCookieSessionInterface(SessionInterface):
+                     samesite=samesite,
+                     httponly=httponly,
+                 )
++                response.vary.add("Cookie")
+ 
+             return
+ 
+-        # Add a "Vary: Cookie" header if the session was accessed at all.
+-        if session.accessed:
+-            response.vary.add("Cookie")
+-
+         if not self.should_set_cookie(app, session):
+             return
+ 
+@@ -419,3 +420,4 @@ class SecureCookieSessionInterface(SessionInterface):
+             secure=secure,
+             samesite=samesite,
+         )
++        response.vary.add("Cookie")
+diff --git a/tests/test_basic.py b/tests/test_basic.py
+index 2a177e9..2da7699 100644
+--- a/tests/test_basic.py
++++ b/tests/test_basic.py
+@@ -558,6 +558,11 @@ def test_session_vary_cookie(app, client):
+     def setdefault():
+         return flask.session.setdefault("test", "default")
+ 
++    @app.route("/clear")
++    def clear():
++        flask.session.clear()
++        return ""
++
+     @app.route("/vary-cookie-header-set")
+     def vary_cookie_header_set():
+         response = flask.Response()
+@@ -590,11 +595,29 @@ def test_session_vary_cookie(app, client):
+     expect("/get")
+     expect("/getitem")
+     expect("/setdefault")
++    expect("/clear")
+     expect("/vary-cookie-header-set")
+     expect("/vary-header-set", "Accept-Encoding, Accept-Language, Cookie")
+     expect("/no-vary-header", None)
+ 
+ 
++def test_session_refresh_vary(app, client):
++    @app.get("/login")
++    def login():
++        flask.session["user_id"] = 1
++        flask.session.permanent = True
++        return ""
++
++    @app.get("/ignored")
++    def ignored():
++        return ""
++
++    rv = client.get("/login")
++    assert rv.headers["Vary"] == "Cookie"
++    rv = client.get("/ignored")
++    assert rv.headers["Vary"] == "Cookie"
++
++
+ def test_flashes(app, req_ctx):
+     assert not flask.session.modified
+     flask.flash("Zap")

meta-python/recipes-devtools/python/python3-flask_2.1.1.bb

@@ -6,6 +6,7 @@ HOMEPAGE = "https://github.com/mitsuhiko/flask/"
 LICENSE = "BSD-3-Clause"
 LIC_FILES_CHKSUM = "file://LICENSE.rst;md5=ffeffa59c90c9c4a033c7574f8f3fb75"
 
+SRC_URI += "file://CVE-2023-30861.patch"
 SRC_URI[sha256sum] = "a8c9bd3e558ec99646d177a9739c41df1ded0629480b4c8d2975412f3c9519c8"
 
 PYPI_PACKAGE = "Flask"