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CVE-2022-42919

Public on

Last Modified: UTC

ImportantImportant ImpactWhat does this mean?
7.8CVSS v3 Base ScoreCVSS Score Breakdown


INSIGHTS VULNERABILITY ANALYSIS

View exposed systems


DESCRIPTION

A vulnerability found in Python. The flaw occurs when used with the forkserver
start method on Linux. The Python multiprocessing library allows Python pickles
to be deserialized from any user in the same machine's local network namespace
in many system configurations, which means any user on the same machine. Pickles
can execute arbitrary code. This flaw allows local user privilege escalation to
the user that any Python multiprocessing forkserver process is running.

A vulnerability found in Python. The flaw occurs when used with the forkserver
start method on Linux. The Python multiprocessing library allows Python pickles
to be deserialized from any user in the same machine's local network namespace
in many system configurations, which means any user on the same machine. Pickles
can execute arbitrary code. This flaw allows local user privilege escalation to
the user that any Python multiprocessing forkserver process is running.




ADDITIONAL INFORMATION

 * Bugzilla 2138705: CVE-2022-42919 python: local privilege escalation via the
   multiprocessing forkserver start method
 * CWE-269: Improper Privilege Management
 * FAQ: Frequently asked questions about CVE-2022-42919


EXTERNAL REFERENCES

https://github.com/python/cpython/issues/97514

https://github.com/python/cpython/issues/97514


AFFECTED PACKAGES AND ISSUED RED HAT SECURITY ERRATA

Search:

PlatformPackageStateErrataRelease DateRed Hat Software
Collectionsrh-python38-pythonNot affectedRed Hat Enterprise Linux
8python39:3.9FixedRHSA-2022:8492Red Hat Enterprise Linux 8.4 Extended Update
Supportpython39:3.9FixedRHSA-2022:8492Red Hat Enterprise Linux 8.6 Extended
Update Supportpython39:3.9FixedRHSA-2022:8492Red Hat Enterprise Linux
8python38:3.8/python38Not affectedRed Hat Enterprise Linux
8python36:3.6/python36Not affectedRed Hat Enterprise Linux
9python3.9FixedRHSA-2022:8493Red Hat Enterprise Linux 9.0 Extended Update
Supportpython3.9FixedRHSA-2022:8493Red Hat Enterprise Linux 7python3Not
affectedRed Hat Enterprise Linux 8python3Not affected

Show 102550100 entries
FirstPrevious12NextLast
Showing 1 to 10 of 15 entries


Unless explicitly stated as not affected, all previous versions of packages in
any minor update stream of a product listed here should be assumed vulnerable,
although may not have been subject to full analysis.


COMMON VULNERABILITY SCORING SYSTEM (CVSS) SCORE DETAILS


CVSS V3 SCORE BREAKDOWN

Red HatNVDCVSS v3 Base Score7.87.8Attack VectorLocalLocalAttack
ComplexityLowLowPrivileges RequiredLowLowUser
InteractionNoneNoneScopeUnchangedUnchangedConfidentiality
ImpactHighHighIntegrity ImpactHighHighAvailability ImpactHighHigh


CVSS V3 VECTOR

Red Hat: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

NVD: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


ACKNOWLEDGEMENTS

Red Hat would like to thank Devin Jeanpierre (Google) for reporting this issue.


FREQUENTLY ASKED QUESTIONS


WHY IS RED HAT'S CVSS V3 SCORE OR IMPACT DIFFERENT FROM OTHER VENDORS?

For open source software shipped by multiple vendors, the CVSS base scores may
vary for each vendor's version depending on the version they ship, how they ship
it, the platform, and even how the software is compiled. This makes scoring of
vulnerabilities difficult for third-party vulnerability databases such as NVD
that only provide a single CVSS base score for each vulnerability. Red Hat
scores reflect how a vulnerability affects our products specifically.

For more information, see https://access.redhat.com/solutions/762393.


MY PRODUCT IS LISTED AS "UNDER INVESTIGATION" OR "AFFECTED", WHEN WILL RED HAT
RELEASE A FIX FOR THIS VULNERABILITY?

 * "Under investigation" doesn't necessarily mean that the product is affected
   by this vulnerability. It only means that our Analysis Team is still working
   on determining whether the product is affected and how it is affected.
 * "Affected" means that our Analysis Team has determined that this product is
   affected by this vulnerability and might release a fix to address this in the
   near future.


WHAT CAN I DO IF MY PRODUCT IS LISTED AS "WILL NOT FIX"?

This depends mostly on the Impact of the vulnerability and the Life Cycle phase
in which your product is currently in. Overall, you have the following options:
 * Upgrade to a supported product version that includes a fix for this
   vulnerability (recommended)
 * Apply a mitigation (if one exists)
 * Open a support case to request a prioritization of releasing a fix for this
   vulnerability


I HAVE A RED HAT PRODUCT BUT IT IS NOT IN THE ABOVE LIST, IS IT AFFECTED?

The listed products were found to include one or more of the components that
this vulnerability affects. These products underwent a thorough evaluation to
determine their affectedness by this vulnerability. Note that layered products
(such as container-based offerings) that consume affected components from any of
the products listed in this table may be affected and are not represented.


WHY IS MY SECURITY SCANNER REPORTING MY PRODUCT AS VULNERABLE TO THIS
VULNERABILITY EVEN THOUGH MY PRODUCT VERSION IS FIXED OR NOT AFFECTED?

In order to maintain code stability and compatibility, Red Hat usually does not
rebase packages to entirely new versions. Instead, we backport fixes and new
features to an older version of the package we distribute. This can result in
some security scanners that only consider the package version to report the
package as vulnerable. To avoid this, we suggest that you use an OVAL-compatible
security scanner like OpenSCAP.

For more information, see https://www.redhat.com/en/blog/determining-your-risk.

Not sure what something means? Check out our Security Glossary.

This page is generated automatically and has not been checked for errors or
omissions.

For clarification or corrections please contact Red Hat Product Security.

Last Modified: UTC

CVE description copyright © 2021


Red Hat


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