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Amazon Linux 2023 : golang-github-burntsushi-toml-test, golang-github-burntsushi-toml-test-devel (ALAS2023-2026-1876)

medium Nessus Plugin ID 322112

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-1876 advisory.

 (*x509.Certificate).VerifyHostname previously called matchHostnames in a loop over all DNS Subject Alternative Name (SAN) entries. This caused strings.Split(host, .) to execute repeatedly on the same input hostname. With a large DNS SAN list, verification costs scaled quadratically based on the number of SAN entries multiplied by the hostname's label count. Because x509.Verify validates hostnames before building the certificate chain, this overhead occurred even for untrusted certificates. (CVE-2026-27145)

 Decoding a maliciously-crafted MIME header containing many invalid encoded-words can consume excessive CPU. (CVE-2026-42504)

 When returning errors, functions in the net/textproto package would include its input as part of the error. This might allow an attacker to inject misleading content to errors that are printed or logged.
 (CVE-2026-42507)

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 golang-github-burntsushi-toml-test --releasever 2023.12.20260622' or or 'dnf update --advisory ALAS2023-2026-1876 --releasever 2023.12.20260622' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1876.html

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

https://explore.alas.aws.amazon.com/CVE-2026-27145.html

https://explore.alas.aws.amazon.com/CVE-2026-42504.html

https://explore.alas.aws.amazon.com/CVE-2026-42507.html

Plugin Details

Severity: Medium

ID: 322112

File Name: al2023_ALAS2023-2026-1876.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/22/2026

Updated: 6/22/2026

Supported Sensors: Nessus Agent, Continuous Assessment, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5.0

CVSS v2

Risk Factor: Medium

Base Score: 6.1

Temporal Score: 4.5

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

CVSS Score Source: CVE-2026-27145

CVSS v3

Risk Factor: Medium

Base Score: 6.5

Temporal Score: 5.7

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:golang-github-burntsushi-toml-test-devel, p-cpe:/a:amazon:linux:golang-github-burntsushi-toml-test-debuginfo, p-cpe:/a:amazon:linux:golang-github-burntsushi-toml-test-debugsource, p-cpe:/a:amazon:linux:golang-github-burntsushi-toml-test, cpe:/o:amazon:linux:2023

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/22/2026

Vulnerability Publication Date: 6/2/2026

Reference Information

CVE: CVE-2026-27145, CVE-2026-42504, CVE-2026-42507

IAVB: 2026-B-0146