Out-of-bounds Read Affecting shim-unsigned-ia32 package, versions <0:15.8-3.el7


Severity

Recommended
high

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.04% (5th percentile)

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  • Snyk IDSNYK-RHEL7-SHIMUNSIGNEDIA32-6190899
  • published25 Jan 2024
  • disclosed23 Jan 2024

Introduced: 23 Jan 2024

CVE-2023-40549  (opens in a new tab)
CWE-125  (opens in a new tab)

How to fix?

Upgrade RHEL:7 shim-unsigned-ia32 to version 0:15.8-3.el7 or higher.
This issue was patched in RHSA-2024:1959.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-unsigned-ia32 package and not the shim-unsigned-ia32 package as distributed by RHEL. See How to fix? for RHEL:7 relevant fixed versions and status.

An out-of-bounds read flaw was found in Shim due to the lack of proper boundary verification during the load of a PE binary. This flaw allows an attacker to load a crafted PE binary, triggering the issue and crashing Shim, resulting in a denial of service.

CVSS Scores

version 3.1