Out-of-bounds Write Affecting kernel package, versions <0:4.14.181-140.257.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-1680116
- published 27 Sep 2021
- disclosed 27 Nov 2019
How to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.181-140.257.amzn2 or higher.
This issue was patched in ALAS2-2020-1431.
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 before 5.2, a setxattr operation, after a mount of a crafted ext4 image, can cause a slab-out-of-bounds write access because of an ext4_xattr_set_entry use-after-free in fs/ext4/xattr.c when a large old_size value is used in a memset call, aka CID-345c0dbf3a30.
References
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=345c0dbf3a30
- https://security.netapp.com/advisory/ntap-20200103-0001/
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2019-19319
- https://www.debian.org/security/2020/dsa-4698
- https://bugzilla.suse.com/show_bug.cgi?id=1158021
- https://github.com/bobfuzzer/CVE/tree/master/CVE-2019-19319
- https://lists.debian.org/debian-lts-announce/2020/06/msg00011.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00012.html
- https://lists.debian.org/debian-lts-announce/2020/06/msg00013.html
- http://lists.opensuse.org/opensuse-security-announce/2020-03/msg00021.html
- https://usn.ubuntu.com/4391-1/