Time-of-check Time-of-use (TOCTOU) Affecting kernel-firmware-atheros package, versions <20220509-150400.4.25.1


Severity

Recommended
high

Based on SUSE Linux Enterprise Server security rating.

Threat Intelligence

EPSS
0.06% (26th percentile)

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  • Snyk IDSNYK-SLES154-KERNELFIRMWAREATHEROS-6128474
  • published15 Dec 2023
  • disclosed6 Dec 2023

Introduced: 6 Dec 2023

CVE-2023-20521  (opens in a new tab)
CWE-367  (opens in a new tab)

How to fix?

Upgrade SLES:15.4 kernel-firmware-atheros to version 20220509-150400.4.25.1 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream kernel-firmware-atheros package and not the kernel-firmware-atheros package as distributed by SLES. See How to fix? for SLES:15.4 relevant fixed versions and status.

TOCTOU in the ASP Bootloader may allow an attacker with physical access to tamper with SPI ROM records after memory content verification, potentially leading to loss of confidentiality or a denial of service.

CVSS Scores

version 3.1