Use After Free Affecting kernel package, versions <0:4.14.209-160.335.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1691907
- published 27 Sep 2021
- disclosed 12 Dec 2019
Introduced: 12 Dec 2019
CVE-2019-19770 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.209-160.335.amzn2 or higher.
This issue was patched in ALAS2-2020-1566.
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.
In the Linux kernel 4.19.83, there is a use-after-free (read) in the debugfs_remove function in fs/debugfs/inode.c (which is used to remove a file or directory in debugfs that was previously created with a call to another debugfs function such as debugfs_create_file). NOTE: Linux kernel developers dispute this issue as not being an issue with debugfs, instead this is an issue with misuse of debugfs within blktrace
References
- https://security.netapp.com/advisory/ntap-20200103-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19770
- https://bugzilla.kernel.org/show_bug.cgi?id=205713
- https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof@kernel.org/
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- http://lists.opensuse.org/opensuse-security-announce/2020-04/msg00035.html
- https://lore.kernel.org/linux-block/20200402000002.7442-1-mcgrof%40kernel.org/