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Amazon Linux 2 : shim (ALAS-2024-2484)

high Nessus Plugin ID 191524

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Synopsis

The remote Amazon Linux 2 host is missing a security update.

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2-2024-2484 advisory.

 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.
 (CVE-2023-40547)

Tenable has extracted the preceding description block directly from the tested product security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Solution

Run 'yum update shim' to update your system.

See Also

https://alas.aws.amazon.com/AL2/ALAS-2024-2484.html

https://alas.aws.amazon.com/cve/html/CVE-2023-40547.html

https://alas.aws.amazon.com/faqs.html

Plugin Details

Severity: High

ID: 191524

File Name: al2_ALAS-2024-2484.nasl

Version: 1.1

Type: local

Agent: unix

Published: 3/5/2024

Updated: 12/11/2024

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Critical

Score: 9.2

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5

Vector: CVSS2#AV:A/AC:H/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2023-40547

CVSS v3

Risk Factor: High

Base Score: 8.3

Temporal Score: 7.2

Vector: CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:shim-unsigned-x64-debuginfo, p-cpe:/a:amazon:linux:shim-unsigned-aa64, p-cpe:/a:amazon:linux:shim-unsigned-aa64-debuginfo, cpe:/o:amazon:linux:2, p-cpe:/a:amazon:linux:shim-unsigned-x64

Required KB Items: Host/local_checks_enabled, Host/AmazonLinux/release, Host/AmazonLinux/rpm-list

Exploit Ease: No known exploits are available

Patch Publication Date: 2/29/2024

Vulnerability Publication Date: 1/25/2024

Reference Information

CVE: CVE-2023-40547