From patchwork Thu Nov 17 02:52:59 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Vivek Kumbhar X-Patchwork-Id: 15534 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 B6AE6C4332F for ; Thu, 17 Nov 2022 02:53:40 +0000 (UTC) Received: from mail-pj1-f49.google.com (mail-pj1-f49.google.com [209.85.216.49]) by mx.groups.io with SMTP id smtpd.web11.6551.1668653613140099870 for ; Wed, 16 Nov 2022 18:53:33 -0800 Authentication-Results: mx.groups.io; dkim=pass header.i=@mvista.com header.s=google header.b=IUe2dxDq; spf=pass (domain: mvista.com, ip: 209.85.216.49, mailfrom: vkumbhar@mvista.com) Received: by mail-pj1-f49.google.com with SMTP id gw22so442610pjb.3 for ; Wed, 16 Nov 2022 18:53:33 -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=t4hD7qzoZNNszW8DtAYmn1BWVKd1SZwiuvzhhqEksyI=; b=IUe2dxDq4dqlyMK2sgnc0RN5fWEFubMVY78CkuAFo/GQXxXqP/UMpHMSlsICmp9mst ks+Oh3VskD3uXD9ykDEVVf4C+qvfYEJi+ohS0TzLJTBEWITQqyHDAtXo1Dt2Fg8TJyPy 86rm5vKOB8ECl7JUTYR1HcVcahMkI+MB4zT1o= 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=t4hD7qzoZNNszW8DtAYmn1BWVKd1SZwiuvzhhqEksyI=; b=KZpKsnYTpf3FYlOuIkSZ4guJ6IKCvjl/H236CTXl8C/hpkyrRAVAV6lEeqm0aa8kVg 2kVXQuz6tY8zfNAo9qUYCoOwCHqA0s2PWj6OGmJ8BqZvhGm16KT60rPP1X5l13AZETcc vCvlQK2Vnsf1en74vEDtAr4e3nIG09ioEjSmG+e3AX95gxb6s2UgZEBnK1xh0RG9+Tt2 D9m7Hk4Zaoa3H14zY5oj4yomsOGU5OEDup+V+Ut0ce5ZvqrlRac9jrutNPNOO+yg/egQ InopmfzjpVevgFGmGPkXjDr8yLgHyO9GPnSiyh2oPaGe0dWxwoApq18YkNrmQiPAowIT vwpg== X-Gm-Message-State: ANoB5pn016UglqOs4YnVVtKisAkNvu/l6XqolHvAUhAhFcOpvrMp2C1G fkjyayDQLGQZSFJlP0r/tGXnbuXyEmr3LQ== X-Google-Smtp-Source: AA0mqf70hCJKTTdk4zjk/K98+lkOaQRjn6R2aZAu4vX0xf1aWEwFvPwPnMC43XpMNbN7IQxFpRIRLw== X-Received: by 2002:a17:90b:2744:b0:218:7675:ba83 with SMTP id qi4-20020a17090b274400b002187675ba83mr240256pjb.61.1668653612031; Wed, 16 Nov 2022 18:53:32 -0800 (PST) Received: from vivek-Latitude-3400.mvista.com ([116.73.95.148]) by smtp.gmail.com with ESMTPSA id j34-20020a635522000000b004761e544ec6sm8348553pgb.89.2022.11.16.18.53.30 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 16 Nov 2022 18:53:31 -0800 (PST) From: vkumbhar@mvista.com To: openembedded-core@lists.openembedded.org Cc: Vivek Kumbhar Subject: [OE-core][dunfell][PATCH] python: fix CVE-2022-42919 local privilege escalation via the multiprocessing forkserver start method Date: Thu, 17 Nov 2022 08:22:59 +0530 Message-Id: <20221117025259.132393-1-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, 17 Nov 2022 02:53:40 -0000 X-Groupsio-URL: https://lists.openembedded.org/g/openembedded-core/message/173398 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 | 71 +++++++++++++++++++ .../recipes-devtools/python/python3_3.10.7.bb | 1 + 2 files changed, 72 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..eb9056731b --- /dev/null +++ b/meta/recipes-devtools/python/python3/CVE-2022-42919.patch @@ -0,0 +1,71 @@ +From 0c318fdc38b8db3bce50d6e9a6ec8064b4ff5720 Mon Sep 17 00:00:00 2001 +From: Vivek Kumbhar +Date: Mon, 14 Nov 2022 11:33:48 +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) +Signed-off-by: Vivek Kumbhar +--- + 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..4a979eede3 100644 --- a/meta/recipes-devtools/python/python3_3.10.7.bb +++ b/meta/recipes-devtools/python/python3_3.10.7.bb @@ -42,6 +42,7 @@ SRC_URI:append:class-native = " \ file://0001-distutils-sysconfig-append-STAGING_LIBDIR-python-sys.patch \ file://12-distutils-prefix-is-inside-staging-area.patch \ file://0001-Don-t-search-system-for-headers-libraries.patch \ + file://CVE-2022-42919.patch \ " SRC_URI[sha256sum] = "6eed8415b7516fb2f260906db5d48dd4c06acc0cb24a7d6cc15296a604dcdc48"