From patchwork Thu Nov 24 12:28:13 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Kumbhar X-Patchwork-Id: 15899 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from aws-us-west-2-korg-lkml-1.web.codeaurora.org (localhost.localdomain [127.0.0.1]) by smtp.lore.kernel.org (Postfix) with ESMTP id 20982C43217 for ; Thu, 24 Nov 2022 12:28:40 +0000 (UTC) Received: from mail-pl1-f171.google.com (mail-pl1-f171.google.com [209.85.214.171]) by mx.groups.io with SMTP id smtpd.web10.22317.1669292910535243291 for ; Thu, 24 Nov 2022 04:28:30 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@mvista.com header.s=google header.b=NCx8J0R0; spf=pass (domain: mvista.com, ip: 209.85.214.171, mailfrom: vkumbhar@mvista.com) Received: by mail-pl1-f171.google.com with SMTP id b21so1344227plc.9 for ; Thu, 24 Nov 2022 04:28:30 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mvista.com; s=google; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:from:to:cc:subject:date:message-id:reply-to; bh=K12JvBxBZsqF7YaXNWmINwY92m0H74osMbHKf0qPXhc=; b=NCx8J0R00r1IsQ4FNDZNlo0FQTsmj1iP4wq03KwfaztVKEWDRZcBpHZ8/nzhpFxHlz h+jIiuKr8xZQ9quz1TTxfuOQkvEimuE42/JiZ7u1npSeinP+CdZqi8zt3VnNbvfUK6dL j6fP1CXUltiOACm0d1syOufbNctV4YzVwFVUM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=content-transfer-encoding:mime-version:message-id:date:subject:cc :to:from:x-gm-message-state:from:to:cc:subject:date:message-id :reply-to; bh=K12JvBxBZsqF7YaXNWmINwY92m0H74osMbHKf0qPXhc=; b=nzLqT6oSvJOPO87o1/72fECpI+iQBpVApn1JfLsYFwsPiWpWtr7WtsK6NSIBK/7Qzz rPgKNRhmdVIQU2PDsPzfQtVhbHl2Yo03aafa5wPlwZPKmkFOEH5jWEOu4RjDichuN9rR +fh47WO7MFkLE3MKGtSXApGDHzPxehmOUciziVNBw7p/Z+5dXb88+Gbjnh4b9BQr9k4M Si3drvjpweEmcHfc7ORWPB7eN3HcB/MztwDV/MXUsekiyOpvjGcoKfQzO1vzLl0xgGkY wvt/cM72YnWsv2HK/gUekexezgZd6NayeTC3sEnDFUoS/rSP5h6lJW84xkMdWvOw1sJ6 Vnag== X-Gm-Message-State: ANoB5pkgxIwNX/ci/lbAkQU5XB2jy/Tib6z5zq076ejaI71BCJzCXZV9 RRp3JoxOhMZyOuJBOZzycJsfst41gDTcjQ== X-Google-Smtp-Source: AA0mqf6tKdcNnO8osnxXN0Jn/d5ZnTjPmWuR0E2bcjwKdIwCn4HhNEUFl+kWWTDQ2DIg/6NQlssimA== X-Received: by 2002:a17:903:1054:b0:189:574d:e84f with SMTP id f20-20020a170903105400b00189574de84fmr3965780plc.9.1669292909772; Thu, 24 Nov 2022 04:28:29 -0800 (PST) Received: from vivek-Latitude-3400.mvista.com ([116.74.131.85]) by smtp.gmail.com with ESMTPSA id c194-20020a621ccb000000b0056a93838606sm1112038pfc.58.2022.11.24.04.28.28 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 24 Nov 2022 04:28:29 -0800 (PST) From: vkumbhar@mvista.com To: openembedded-core@lists.openembedded.org Cc: Vivek Kumbhar Subject: [OE-core][kirkstone][PATCH] python3: fix CVE-2022-42919 local privilege escalation via the multiprocessing forkserver start method Date: Thu, 24 Nov 2022 17:58:13 +0530 Message-Id: <20221124122813.81104-1-vkumbhar@mvista.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 List-Id: X-Webhook-Received: from li982-79.members.linode.com [45.33.32.79] by aws-us-west-2-korg-lkml-1.web.codeaurora.org with HTTPS for ; Thu, 24 Nov 2022 12:28:40 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/173745 From: Vivek Kumbhar Upstream-Status: Backport from https://github.com/python/cpython/commit/eae692eed18892309bcc25a2c0f8980038305ea2 Signed-off-by: Vivek Kumbhar --- .../python/python3/CVE-2022-42919.patch | 70 +++++++++++++++++++ .../recipes-devtools/python/python3_3.10.7.bb | 1 + 2 files changed, 71 insertions(+) create mode 100644 meta/recipes-devtools/python/python3/CVE-2022-42919.patch diff --git a/meta/recipes-devtools/python/python3/CVE-2022-42919.patch b/meta/recipes-devtools/python/python3/CVE-2022-42919.patch new file mode 100644 index 0000000000..6040724dae --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2022-42919.patch @@ -0,0 +1,70 @@ +From 87ef80926ea0ec960a220af89d8ff4db99417b03 Mon Sep 17 00:00:00 2001 +From: Vivek Kumbhar +Date: Thu, 24 Nov 2022 17:44:18 +0530 +Subject: [PATCH] CVE-2022-42919 + +Upstream-Status: Backport [https://github.com/python/cpython/commit/eae692eed18892309bcc25a2c0f8980038305ea2] +CVE: CVE-2022-42919 +Signed-off-by: Vivek Kumbhar + +[3.10] gh-97514: Don't use Linux abstract sockets for multiprocessing (GH-98501) (GH-98503) + +Linux abstract sockets are insecure as they lack any form of filesystem +permissions so their use allows anyone on the system to inject code into +the process. + +This removes the default preference for abstract sockets in +multiprocessing introduced in Python 3.9+ via +https://github.com/python/cpython/pull/18866 while fixing +https://github.com/python/cpython/issues/84031. + +Explicit use of an abstract socket by a user now generates a +RuntimeWarning. If we choose to keep this warning, it should be +backported to the 3.7 and 3.8 branches. +(cherry picked from commit 49f61068f49747164988ffc5a442d2a63874fc17) +--- + Lib/multiprocessing/connection.py | 5 ----- + .../2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst | 15 +++++++++++++++ + 2 files changed, 15 insertions(+), 5 deletions(-) + create mode 100644 Misc/NEWS.d/next/Security/2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst + +diff --git a/Lib/multiprocessing/connection.py b/Lib/multiprocessing/connection.py +index 510e4b5..8e2facf 100644 +--- a/Lib/multiprocessing/connection.py ++++ b/Lib/multiprocessing/connection.py +@@ -73,11 +73,6 @@ def arbitrary_address(family): + if family == 'AF_INET': + return ('localhost', 0) + elif family == 'AF_UNIX': +- # Prefer abstract sockets if possible to avoid problems with the address +- # size. When coding portable applications, some implementations have +- # sun_path as short as 92 bytes in the sockaddr_un struct. +- if util.abstract_sockets_supported: +- return f"\0listener-{os.getpid()}-{next(_mmap_counter)}" + return tempfile.mktemp(prefix='listener-', dir=util.get_temp_dir()) + elif family == 'AF_PIPE': + return tempfile.mktemp(prefix=r'\\.\pipe\pyc-%d-%d-' % +diff --git a/Misc/NEWS.d/next/Security/2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst b/Misc/NEWS.d/next/Security/2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst +new file mode 100644 +index 0000000..02d95b5 +--- /dev/null ++++ b/Misc/NEWS.d/next/Security/2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst +@@ -0,0 +1,15 @@ ++On Linux the :mod:`multiprocessing` module returns to using filesystem backed ++unix domain sockets for communication with the *forkserver* process instead of ++the Linux abstract socket namespace. Only code that chooses to use the ++:ref:`"forkserver" start method ` is affected. ++ ++Abstract sockets have no permissions and could allow any user on the system in ++the same `network namespace ++`_ (often the ++whole system) to inject code into the multiprocessing *forkserver* process. ++This was a potential privilege escalation. Filesystem based socket permissions ++restrict this to the *forkserver* process user as was the default in Python 3.8 ++and earlier. ++ ++This prevents Linux `CVE-2022-42919 ++`_. +-- +2.25.1 + diff --git a/meta/recipes-devtools/python/python3_3.10.7.bb b/meta/recipes-devtools/python/python3_3.10.7.bb index 404a582135..2d230793ef 100644 --- a/meta/recipes-devtools/python/python3_3.10.7.bb +++ b/meta/recipes-devtools/python/python3_3.10.7.bb @@ -35,6 +35,7 @@ SRC_URI = "http://www.python.org/ftp/python/${PV}/Python-${PV}.tar.xz \ file://0001-setup.py-Do-not-detect-multiarch-paths-when-cross-co.patch \ file://deterministic_imports.patch \ file://0001-Avoid-shebang-overflow-on-python-config.py.patch \ + file://CVE-2022-42919.patch \ " SRC_URI:append:class-native = " \