diff --git a/SOURCES/00391-cve-2022-42919.patch b/SOURCES/00391-cve-2022-42919.patch new file mode 100644 index 0000000..0e67857 --- /dev/null +++ b/SOURCES/00391-cve-2022-42919.patch @@ -0,0 +1,64 @@ +From 85178d5849a4d9b5b46e7b91b1ebad7425139b44 Mon Sep 17 00:00:00 2001 +From: "Gregory P. Smith" +Date: Thu, 20 Oct 2022 15:30:09 -0700 +Subject: [PATCH] gh-97514: Don't use Linux abstract sockets for + multiprocessing (GH-98501) + +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) + +Co-authored-by: Gregory P. Smith +--- + 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 510e4b5aba44..8e2facf92a94 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 000000000000..02d95b570520 +--- /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 ++`_. diff --git a/SPECS/python39.spec b/SPECS/python39.spec index d24124a..064ac29 100644 --- a/SPECS/python39.spec +++ b/SPECS/python39.spec @@ -17,7 +17,7 @@ URL: https://www.python.org/ #global prerel ... %global upstream_version %{general_version}%{?prerel} Version: %{general_version}%{?prerel:~%{prerel}} -Release: 1%{?dist} +Release: 2%{?dist} License: Python # Exclude i686 arch. Due to a modularity issue it's being added to the @@ -425,6 +425,16 @@ Patch378: 00378-support-expat-2-4-5.patch # Tracker bug: https://bugzilla.redhat.com/show_bug.cgi?id=2075390 Patch382: 00382-cve-2015-20107.patch +# 00391 # +# CVE-2022-42919 +# +# Local privilege escalation via the multiprocessing forkserver start method. +# +# Upstream: https://github.com/python/cpython/issues/97514 +# +# Tracker bug: https://bugzilla.redhat.com/show_bug.cgi?id=2138705 +Patch391: 00391-cve-2022-42919.patch + # (New patches go here ^^^) # # When adding new patches to "python" and "python3" in Fedora, EL, etc., @@ -837,6 +847,7 @@ rm Lib/ensurepip/_bundled/*.whl %apply_patch -q %{PATCH353} %apply_patch -q %{PATCH378} %apply_patch -q %{PATCH382} +%apply_patch -q %{PATCH391} # Remove all exe files to ensure we are not shipping prebuilt binaries # note that those are only used to create Microsoft Windows installers @@ -2003,6 +2014,10 @@ fi # ====================================================== %changelog +* Mon Nov 07 2022 Lumír Balhar - 3.9.14-2 +- Fix for CVE-2022-42919 +Resolves: rhbz#2138705 + * Mon Sep 12 2022 Charalampos Stratakis - 3.9.14-1 - Update to 3.9.14 - Security fixes for CVE-2020-10735 and CVE-2021-28861