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
Configurations
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Configuration 2 (hide)
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History
03 May 2023, 11:15
| Type | Values Removed | Values Added |
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| Summary | 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. | |
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| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/P2LHWWEI5OBQ6RELULMVU6KMDYG4WZXH/ - Third Party Advisory | |
| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/R6KGIRHSENZ4QAB234Z36HVIDTRJ3MFI/ - Third Party Advisory | |
| References | (CONFIRM) https://security.netapp.com/advisory/ntap-20221209-0006/ - Third Party Advisory | |
| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XX6LLAXGZVZ327REY6MDZRMMP47LJ53P/ - Third Party Advisory | |
| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VCRKBB5Y5EWTJUNC7LK665WO64DDXSTN/ - Mailing List, Third Party Advisory | |
| References | (MISC) https://github.com/python/cpython/issues/97514#issuecomment-1310277840 - Third Party Advisory | |
| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/FKGCQPIVHEAIJ77R3RSNSQWYBUDVWDKU/ - Mailing List, Third Party Advisory | |
| References | (FEDORA) https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/PI5DYIED6U26BGX5IRZWNCP6TY4M2ZGZ/ - Mailing List, Third Party Advisory | |
| CPE | cpe:2.3:o:fedoraproject:fedora:36:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:37:*:*:*:*:*:*:* cpe:2.3:o:fedoraproject:fedora:35:*:*:*:*:*:*:* |
14 Dec 2022, 19:15
| Type | Values Removed | Values Added |
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| Summary | Python 3.9.x and 3.10.x through 3.10.8 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. | |
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01 Dec 2022, 07:15
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23 Nov 2022, 03:15
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08 Nov 2022, 15:03
| Type | Values Removed | Values Added |
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| CWE | NVD-CWE-noinfo | |
| CPE | cpe:2.3:a:python:python:*:*:*:*:*:*:*:* | |
| CVSS |
v2 : v3 : |
v2 : unknown
v3 : 7.8 |
| References | (MISC) https://github.com/python/cpython/issues/97514 - Third Party Advisory |
07 Nov 2022, 01:44
| Type | Values Removed | Values Added |
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| New CVE |
Information
Published : 2022-11-07 00:15
Updated : 2024-02-04 22:51
NVD link : CVE-2022-42919
Mitre link : CVE-2022-42919
CVE.ORG link : CVE-2022-42919
JSON object : View
Products Affected
fedoraproject
- fedora
python
- python
CWE