Out-of-bounds Read Affecting shim-unsigned-x64 package, versions <0:15.8-2.el8


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.05% (18th percentile)

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  • Snyk IDSNYK-RHEL8-SHIMUNSIGNEDX64-8146885
  • published2 Oct 2024
  • disclosed23 Jan 2024

Introduced: 23 Jan 2024

CVE-2023-40550  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade RHEL:8 shim-unsigned-x64 to version 0:15.8-2.el8 or higher.
This issue was patched in RHSA-2024:1883.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-unsigned-x64 package and not the shim-unsigned-x64 package as distributed by RHEL. See How to fix? for RHEL:8 relevant fixed versions and status.

An out-of-bounds read flaw was found in Shim when it tried to validate the SBAT information. This issue may expose sensitive data during the system's boot phase.

CVSS Base Scores

version 3.1