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Amazon Linux 2023 : aws-cfn-bootstrap (ALAS2023-2026-1662)

high Nessus Plugin ID 315023

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Synopsis

The remote Amazon Linux 2023 host is missing a security update.

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1662 advisory.

 A flaw was found in OpenSSL. A remote attacker can exploit a stack buffer overflow vulnerability by supplying a crafted Cryptographic Message Syntax (CMS) message with an oversized Initialization Vector (IV) when parsing AuthEnvelopedData structures that use Authenticated Encryption with Associated Data (AEAD) ciphers such as AES-GCM. This can lead to a crash, causing a Denial of Service (DoS), or potentially allow for remote code execution. (CVE-2025-15467)

 Calling PKCS12_get_friendlyname() function on a maliciously crafted PKCS#12 file with a BMPString (UTF-16BE) friendly name containing non-ASCII BMP code point can trigger a one byte write before the allocated buffer. (CVE-2025-69419)

 A type confusion vulnerability exists in the TimeStamp Response verification code where an ASN1_TYPE union member is accessed without first validating the type, causing an invalid or NULL pointer dereference when processing a malformed TimeStamp Response file. (CVE-2025-69420)

 Processing a malformed PKCS#12 file can trigger a NULL pointer dereference in the PKCS12_item_decrypt_d2i_ex() function. (CVE-2025-69421)

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

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

Solution

Run 'dnf update aws-cfn-bootstrap --releasever 2023.11.20260514' or or 'dnf update --advisory ALAS2023-2026-1662 --releasever 2023.11.20260514' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1662.html

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

https://explore.alas.aws.amazon.com/CVE-2025-15467.html

https://explore.alas.aws.amazon.com/CVE-2025-69419.html

https://explore.alas.aws.amazon.com/CVE-2025-69420.html

https://explore.alas.aws.amazon.com/CVE-2025-69421.html

Plugin Details

Severity: High

ID: 315023

File Name: al2023_ALAS2023-2026-1662.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 5/16/2026

Updated: 5/16/2026

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

Risk Information

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.1

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

CVSS Score Source: CVE-2025-69421

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:aws-cfn-bootstrap, cpe:/o:amazon:linux:2023

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 5/15/2026

Vulnerability Publication Date: 4/9/2024

Reference Information

CVE: CVE-2025-15467, CVE-2025-69419, CVE-2025-69420, CVE-2025-69421