Incorrect Authorization Affecting kernel-tools package, versions <0:4.14.232-123.381.amzn1


Severity

Recommended
low

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-AMZN201803-KERNELTOOLS-1726124
  • published27 Sept 2021
  • disclosed6 May 2021

Introduced: 6 May 2021

CVE-2021-31829  (opens in a new tab)
CWE-863  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2018.03 kernel-tools to version 0:4.14.232-123.381.amzn1 or higher.
This issue was patched in ALAS-2021-1503.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools package and not the kernel-tools package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2018.03 relevant fixed versions and status.

kernel/bpf/verifier.c in the Linux kernel through 5.12.1 performs undesirable speculative loads, leading to disclosure of stack content via side-channel attacks, aka CID-801c6058d14a. The specific concern is not protecting the BPF stack area against speculative loads. Also, the BPF stack can contain uninitialized data that might represent sensitive information previously operated on by the kernel.

CVSS Scores

version 3.1