diff --git a/CVE-2022-42919-loc-priv-mulitproc-forksrv.patch b/CVE-2022-42919-loc-priv-mulitproc-forksrv.patch new file mode 100644 index 0000000..e616e48 --- /dev/null +++ b/CVE-2022-42919-loc-priv-mulitproc-forksrv.patch @@ -0,0 +1,59 @@ +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 --- + Misc/NEWS.d/next/Security/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 + +--- 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-' % +--- /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/python311.changes b/python311.changes index 025047b..d99ad2a 100644 --- a/python311.changes +++ b/python311.changes @@ -1,3 +1,11 @@ +------------------------------------------------------------------- +Fri Nov 4 14:59:53 UTC 2022 - Matej Cepl + +- Add CVE-2022-42919-loc-priv-mulitproc-forksrv.patch to avoid + CVE-2022-42919 (bsc#1204886) avoiding Linux specific local + privilege escalation via the multiprocessing forkserver start + method. + ------------------------------------------------------------------- Tue Oct 25 08:39:47 UTC 2022 - Matej Cepl diff --git a/python311.spec b/python311.spec index 2d3cba8..b3ed512 100644 --- a/python311.spec +++ b/python311.spec @@ -169,6 +169,9 @@ Patch36: support-expat-CVE-2022-25236-patched.patch # PATCH-FIX-UPSTREAM 98437-sphinx.locale._-as-gettext-in-pyspecific.patch gh#python/cpython#98366 mcepl@suse.com # this patch makes things totally awesome Patch37: 98437-sphinx.locale._-as-gettext-in-pyspecific.patch +# PATCH-FIX-UPSTREAM CVE-2022-42919-loc-priv-mulitproc-forksrv.patch bsc#1204886 mcepl@suse.com +# Avoid Linux specific local privilege escalation via the multiprocessing forkserver start method +Patch38: CVE-2022-42919-loc-priv-mulitproc-forksrv.patch BuildRequires: autoconf-archive BuildRequires: automake BuildRequires: fdupes @@ -436,6 +439,7 @@ other applications. %patch35 -p1 %patch36 -p1 %patch37 -p1 +%patch38 -p1 # drop Autoconf version requirement sed -i 's/^AC_PREREQ/dnl AC_PREREQ/' configure.ac