Information Exposure Affecting kernel-tools-devel package, versions <0:4.14.241-184.433.amzn2


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.05% (19th percentile)

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  • Snyk IDSNYK-AMZN2-KERNELTOOLSDEVEL-1702276
  • published27 Sept 2021
  • disclosed2 Aug 2021

Introduced: 2 Aug 2021

CVE-2021-34556  (opens in a new tab)
CWE-203  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2 kernel-tools-devel to version 0:4.14.241-184.433.amzn2 or higher.
This issue was patched in ALAS2-2021-1696.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-tools-devel package and not the kernel-tools-devel package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2 relevant fixed versions and status.

In the Linux kernel through 5.13.7, an unprivileged BPF program can obtain sensitive information from kernel memory via a Speculative Store Bypass side-channel attack because the protection mechanism neglects the possibility of uninitialized memory locations on the BPF stack.

CVSS Scores

version 3.1