Bug 2035652 (CVE-2021-4197) - CVE-2021-4197 kernel: cgroup: Use open-time creds and namespace for migration perm checks
Summary: CVE-2021-4197 kernel: cgroup: Use open-time creds and namespace for migration...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2021-4197
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
medium
medium
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 2035668 2035766 2035767 2035768 2075018 2075019 2075020 2075021 2075022 2075023
Blocks: 2030983 2036691
TreeView+ depends on / blocked
 
Reported: 2021-12-26 13:49 UTC by Alex
Modified: 2023-02-02 12:03 UTC (History)
46 users (show)

Fixed In Version: Linux kernel 5.17-rc1
Clone Of:
Environment:
Last Closed: 2022-05-11 13:46:30 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHBA-2022:2229 0 None None None 2022-05-12 11:27:05 UTC
Red Hat Product Errata RHBA-2022:4630 0 None None None 2022-05-18 11:46:52 UTC
Red Hat Product Errata RHBA-2022:4693 0 None None None 2022-05-19 05:11:18 UTC
Red Hat Product Errata RHBA-2022:4969 0 None None None 2022-06-08 18:40:27 UTC
Red Hat Product Errata RHBA-2022:5088 0 None None None 2022-06-16 11:23:47 UTC
Red Hat Product Errata RHBA-2022:5744 0 None None None 2022-07-27 17:36:45 UTC
Red Hat Product Errata RHSA-2022:1975 0 None None None 2022-05-10 14:40:43 UTC
Red Hat Product Errata RHSA-2022:1988 0 None None None 2022-05-10 14:46:47 UTC
Red Hat Product Errata RHSA-2022:5626 0 None None None 2022-07-19 21:06:07 UTC
Red Hat Product Errata RHSA-2022:5633 0 None None None 2022-07-19 21:07:48 UTC

Description Alex 2021-12-26 13:49:57 UTC 
In cgroups (control groups) functionality of Linux Kernel found potential security weakness that may allow scenarios where a less privileged process tricks a more privileged one into writing into a fd that it created. This could lead to local escalation of privilege for the containers or other processes that uses cgroups in such a way. User interaction is not needed for exploitation.

Reference and upstream patch:
https://lore.kernel.org/lkml/20211209214707.805617-1-tj@kernel.org/T/
Comment 3 Alex 2021-12-26 16:48:08 UTC 
Created kernel tracking bugs for this issue:

Affects: fedora-all [bug 2035668]
Comment 11 errata-xmlrpc 2022-05-10 14:40:39 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1975 https://access.redhat.com/errata/RHSA-2022:1975
Comment 12 errata-xmlrpc 2022-05-10 14:46:43 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2022:1988 https://access.redhat.com/errata/RHSA-2022:1988
Comment 13 Product Security DevOps Team 2022-05-11 13:46:25 UTC 
This bug is now closed. Further updates for individual products will be reflected on the CVE page(s):

https://access.redhat.com/security/cve/cve-2021-4197
Comment 14 errata-xmlrpc 2022-07-19 21:06:03 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:5626 https://access.redhat.com/errata/RHSA-2022:5626
Comment 15 errata-xmlrpc 2022-07-19 21:07:46 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8.4 Extended Update Support

Via RHSA-2022:5633 https://access.redhat.com/errata/RHSA-2022:5633
Note You need to log in before you can comment on or make changes to this bug.