Out-of-bounds Write Affecting kernel package, versions <0:4.14.290-217.505.amzn2
Threat Intelligence
EPSS
0.04% (6th
percentile)
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Test your applications- Snyk ID SNYK-AMZN2-KERNEL-2988096
- published 20 Aug 2022
- disclosed 18 Jul 2022
Introduced: 18 Jul 2022
CVE-2021-33655 Open this link in a new tabHow to fix?
Upgrade Amazon-Linux:2 kernel to version 0:4.14.290-217.505.amzn2 or higher.
This issue was patched in ALAS2-2022-1833.
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.
When sending malicous data to kernel by ioctl cmd FBIOPUT_VSCREENINFO,kernel will write memory out of bounds.
References
- http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33655
- http://www.openwall.com/lists/oss-security/2022/07/19/2
- https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=086ff84617185393a0bbf25830c4f36412a7d3f4
- https://lists.debian.org/debian-lts-announce/2022/10/msg00000.html
- https://www.debian.org/security/2022/dsa-5191
CVSS Scores
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