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CVE-2022-42919: Fix quadratic time idna decoding.

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Descriptor: python-3.10.2 fix bug CVE-2022-42919
issue:https://gitee.com/openharmony/third_party_python/issues/I62CMH?from=project-issue

Signed-off-by: lsn1028 <longshining2@huawei.com>
This commit is contained in:
lsn1028 2022-11-22 14:58:17 +08:00
parent 4d5303825a
commit 446ac8c140
2 changed files with 15 additions and 5 deletions
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5
Lib/multiprocessing/connection.py
View File

@ -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-' %

15
Misc/NEWS.d/next/Security/2022-09-07-10-42-00.gh-issue-97514.Yggdsl.rst Normal file
View File

@ -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 <multiprocessing-start-methods>` is affected.
Abstract sockets have no permissions and could allow any user on the system in
the same `network namespace
<https://man7.org/linux/man-pages/man7/network_namespaces.7.html>`_ (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
<https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2022-42919>`_.