Improper Authentication Affecting kernel package, versions <0:4.14.268-205.500.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-2419659
- published 9 Mar 2022
- disclosed 23 Mar 2022
Introduced: 9 Mar 2022
CVE-2021-4197 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.268-205.500.amzn2 or higher.
This issue was patched in ALAS2-2022-1761.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel package and not the kernel package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
An unprivileged write to the file handler flaw in the Linux kernel's control groups and namespaces subsystem was found in the way users have access to some less privileged process that are controlled by cgroups and have higher privileged parent process. It is actually both for cgroup2 and cgroup1 versions of control groups. A local user could use this flaw to crash the system or escalate their privileges on the system.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-4197
- https://bugzilla.redhat.com/show_bug.cgi?id=2035652
- https://lore.kernel.org/lkml/20211209214707.805617-1-tj@kernel.org/T/
- https://security.netapp.com/advisory/ntap-20220602-0006/
- https://www.debian.org/security/2022/dsa-5127
- https://www.debian.org/security/2022/dsa-5173
- https://www.oracle.com/security-alerts/cpujul2022.html
- https://lore.kernel.org/lkml/20211209214707.805617-1-tj%40kernel.org/T/