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CVE-2022-42919 Detail

Current Description

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.


View Analysis Description

Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score
NIST: NVD
Base Score:  7.8 HIGH
Vector:  CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: NVD Analysts have published a CVSS score for this CVE based on publicly available information at the time of analysis. The CNA has not provided a score within the CVE List.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://github.com/python/cpython/compare/v3.10.8...v3.10.9
https://github.com/python/cpython/compare/v3.9.15...v3.9.16
https://github.com/python/cpython/issues/97514 Third Party Advisory 
https://github.com/python/cpython/issues/97514#issuecomment-1310277840
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FKGCQPIVHEAIJ77R3RSNSQWYBUDVWDKU/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2LHWWEI5OBQ6RELULMVU6KMDYG4WZXH/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PI5DYIED6U26BGX5IRZWNCP6TY4M2ZGZ/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/QLUGZSEAO3MBWGKCUSMKQIRYJZKJCIOB/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6KGIRHSENZ4QAB234Z36HVIDTRJ3MFI/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/RDK3ZZBRYFO47ET3N4BNTKVXN47U6ICY/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCRKBB5Y5EWTJUNC7LK665WO64DDXSTN/
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XX6LLAXGZVZ327REY6MDZRMMP47LJ53P/
https://security.netapp.com/advisory/ntap-20221209-0006/

Weakness Enumeration

CWE-ID CWE Name Source
NVD-CWE-noinfo Insufficient Information cwe source acceptance level NIST  

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Change History

11 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-42919
NVD Published Date:
11/06/2022
NVD Last Modified:
01/17/2023
Source:
MITRE