Out-of-bounds Write Affecting shim-ia32 package, versions <0:15.8-4.0.1.el8


Severity

Recommended
0.0
high
0
10

Based on Oracle Linux security rating.

Threat Intelligence

EPSS
3.78% (88th percentile)

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  • Snyk IDSNYK-ORACLE8-SHIMIA32-6674306
  • published27 Apr 2024
  • disclosed25 Jan 2024

Introduced: 25 Jan 2024

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

How to fix?

Upgrade Oracle:8 shim-ia32 to version 0:15.8-4.0.1.el8 or higher.
This issue was patched in ELSA-2024-1902.

NVD Description

Note: Versions mentioned in the description apply only to the upstream shim-ia32 package and not the shim-ia32 package as distributed by Oracle. See How to fix? for Oracle: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 Base Scores

version 3.1