Use After Free Affecting kernel-debuginfo package, versions <0:4.14.209-160.335.amzn2
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Test your applications- Snyk ID SNYK-AMZN2-KERNELDEBUGINFO-1691820
- published 27 Sep 2021
- disclosed 2 Dec 2020
Introduced: 2 Dec 2020
CVE-2020-25656 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel-debuginfo 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-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. A use-after-free was found in the way the console subsystem was using ioctls KDGKBSENT and KDSKBSENT. A local user could use this flaw to get read memory access out of bounds. The highest threat from this vulnerability is to data confidentiality.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2020-25656
- https://bugzilla.redhat.com/show_bug.cgi?id=1888726
- https://lkml.org/lkml/2020/10/16/84
- https://lkml.org/lkml/2020/10/29/528
- https://lists.debian.org/debian-lts-announce/2020/12/msg00015.html
- https://lists.debian.org/debian-lts-announce/2020/12/msg00027.html
- https://www.starwindsoftware.com/security/sw-20210325-0006/