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Amazon Linux 2023 : gnutls, gnutls-c++, gnutls-dane (ALAS2023-2026-1777)

critical Nessus Plugin ID 319825

Synopsis

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

Description

It is, therefore, affected by a vulnerability as referenced in the ALAS2023-2026-1777 advisory.

 A remotely triggerable underflow in the DTLS reassembly code led to a heap overrun. The issue was reported in the issue tracker as #1811 by Joshua Rogers of AISLE Research Team. (CVE-2026-33845)

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 'dnf update gnutls --releasever 2023.12.20260608' or or 'dnf update --advisory ALAS2023-2026-1777 --releasever 2023.12.20260608' to update your system.

See Also

https://alas.aws.amazon.com//AL2023/ALAS2023-2026-1777.html

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

https://explore.alas.aws.amazon.com/CVE-2026-33845.html

Plugin Details

Severity: Critical

ID: 319825

File Name: al2023_ALAS2023-2026-1777.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 6/8/2026

Updated: 6/8/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 6.0

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7

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

CVSS Score Source: CVE-2026-33845

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 7.9

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

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

Vulnerability Information

CPE: p-cpe:/a:amazon:linux:gnutls-c%2b%2b-debuginfo, p-cpe:/a:amazon:linux:gnutls-debuginfo, p-cpe:/a:amazon:linux:gnutls-debugsource, p-cpe:/a:amazon:linux:gnutls-utils, p-cpe:/a:amazon:linux:gnutls-utils-debuginfo, p-cpe:/a:amazon:linux:gnutls-dane-debuginfo, p-cpe:/a:amazon:linux:gnutls-devel, p-cpe:/a:amazon:linux:gnutls-dane, cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:gnutls, p-cpe:/a:amazon:linux:gnutls-c%2b%2b

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

Exploit Ease: No known exploits are available

Patch Publication Date: 6/8/2026

Vulnerability Publication Date: 4/30/2026

Reference Information

CVE: CVE-2026-33845

IAVA: 2026-A-0405