CVE-2022-42919 Affecting python39:3.9/python39-test package, versions <0:3.9.13-2.module_el8.7.0+3351+e02cdf9b


Severity

Recommended
0.0
high
0
10

Based on AlmaLinux security rating.

Threat Intelligence

EPSS
0.04% (12th percentile)

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  • Snyk IDSNYK-ALMALINUX8-PYTHON39-5620120
  • published28 May 2023
  • disclosed16 Nov 2022

Introduced: 16 Nov 2022

CVE-2022-42919  (opens in a new tab)

How to fix?

Upgrade AlmaLinux:8 python39:3.9/python39-test to version 0:3.9.13-2.module_el8.7.0+3351+e02cdf9b or higher.
This issue was patched in ALSA-2022:8492.

NVD Description

Note: Versions mentioned in the description apply only to the upstream python39:3.9/python39-test package and not the python39:3.9/python39-test package as distributed by AlmaLinux. See How to fix? for AlmaLinux:8 relevant fixed versions and status.

Python 3.9.x before 3.9.16 and 3.10.x before 3.10.9 on Linux allows local privilege escalation in a non-default configuration. The Python multiprocessing library, when used with the forkserver start method on Linux, allows pickles to be deserialized from any user in the same machine local network namespace, which in many system configurations means any user on the same machine. Pickles can execute arbitrary code. Thus, this allows for local user privilege escalation to the user that any forkserver process is running as. Setting multiprocessing.util.abstract_sockets_supported to False is a workaround. The forkserver start method for multiprocessing is not the default start method. This issue is Linux specific because only Linux supports abstract namespace sockets. CPython before 3.9 does not make use of Linux abstract namespace sockets by default. Support for users manually specifying an abstract namespace socket was added as a bugfix in 3.7.8 and 3.8.3, but users would need to make specific uncommon API calls in order to do that in CPython before 3.9.

References

CVSS Scores

version 3.1