Information Exposure Affecting kernel-debuginfo package, versions <0:4.14.246-187.474.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-1703709
- published 27 Sep 2021
- disclosed 10 Mar 2022
Introduced: 27 Sep 2021
CVE-2021-3732 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo to version 0:4.14.246-187.474.amzn2 or higher.
This issue was patched in ALAS2-2021-1704.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kernel-debuginfo package and not the kernel-debuginfo package as distributed by Amazon-Linux.
See How to fix? for Amazon-Linux:2 relevant fixed versions and status.
A flaw was found in the Linux kernel's OverlayFS subsystem in the way the user mounts the TmpFS filesystem with OverlayFS. This flaw allows a local user to gain access to hidden files that should not be accessible.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-3732
- https://bugzilla.redhat.com/show_bug.cgi?id=1995249
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=427215d85e8d1476da1a86b8d67aceb485eb3631
- https://github.com/torvalds/linux/commit/427215d85e8d1476da1a86b8d67aceb485eb3631
- https://ubuntu.com/security/CVE-2021-3732