Origin Validation Error Affecting shim-x64 package, versions <0:15.8-2.el8_6


Severity

Recommended
0.0
high
0
10

Based on Red Hat Enterprise Linux security rating.

Threat Intelligence

EPSS
0.65% (80th percentile)

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  • Snyk IDSNYK-RHEL8-SHIMX64-6735263
  • published30 Apr 2024
  • disclosed23 Jan 2024

Introduced: 23 Jan 2024

CVE-2023-40547  (opens in a new tab)
CWE-346  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

Upgrade RHEL:8 shim-x64 to version 0:15.8-2.el8_6 or higher.
This issue was patched in RHSA-2024:2086.

NVD Description

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

A remote code execution vulnerability was found in Shim. The Shim boot support trusts attacker-controlled values when parsing an HTTP response. This flaw allows an attacker to craft a specific malicious HTTP request, leading to a completely controlled out-of-bounds write primitive and complete system compromise. This flaw is only exploitable during the early boot phase, an attacker needs to perform a Man-in-the-Middle or compromise the boot server to be able to exploit this vulnerability successfully.

CVSS Scores

version 3.1