Amazon Linux 2023 : aspnetcore-runtime-8.0, aspnetcore-runtime-dbg-8.0, aspnetcore-targeting-pack-8.0 (ALAS2023-2026-2095)

high Nessus Plugin ID 341905

Synopsis

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

Description

It is, therefore, affected by multiple vulnerabilities as referenced in the ALAS2023-2026-2095 advisory.

Inconsistent interpretation of http requests ('http request/response smuggling') in .NET allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-62899)

Improper removal of sensitive information before storage or transfer in .NET allows an unauthorized attacker to disclose information over a network. (CVE-2026-62900)

Unchecked input for loop condition in .NET allows an unauthorized attacker to deny service over a network.
(CVE-2026-62901)

Uncaught exception in .NET allows an authorized attacker to elevate privileges locally. (CVE-2026-62909)

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 dotnet8.0 --releasever 2023.12.20260831' or or 'dnf update --advisory ALAS2023-2026-2095 --releasever 2023.12.20260831' to update your system.

Plugin Details

Severity: High

ID: 341905

File Name: al2023_ALAS2023-2026-2095.nasl

Version: 1.1

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 8/31/2026

Updated: 8/31/2026

Supported Sensors: Agentless Assessment, Continuous Assessment, Frictionless Assessment Agent, Frictionless Assessment AWS, Nessus Agent, Tenable Cloud Security, Tenable Self-Hosted Container Security, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 5

Percentile: 93.75

CVSS v2

Risk Factor: Medium

Base Score: 6

Temporal Score: 4.4

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

CVSS Score Source: CVE-2026-62909

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 6.8

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

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

Vulnerability Information

CPE: cpe:/o:amazon:linux:2023, p-cpe:/a:amazon:linux:aspnetcore-runtime-8.0, p-cpe:/a:amazon:linux:aspnetcore-runtime-dbg-8.0, p-cpe:/a:amazon:linux:aspnetcore-targeting-pack-8.0, p-cpe:/a:amazon:linux:dotnet-apphost-pack-8.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-apphost-pack-8.0, p-cpe:/a:amazon:linux:dotnet-host-debuginfo, p-cpe:/a:amazon:linux:dotnet-host, p-cpe:/a:amazon:linux:dotnet-hostfxr-8.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-hostfxr-8.0, p-cpe:/a:amazon:linux:dotnet-runtime-8.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-runtime-8.0, p-cpe:/a:amazon:linux:dotnet-runtime-dbg-8.0, p-cpe:/a:amazon:linux:dotnet-sdk-8.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-sdk-8.0-source-built-artifacts, p-cpe:/a:amazon:linux:dotnet-sdk-8.0, p-cpe:/a:amazon:linux:dotnet-sdk-dbg-8.0, p-cpe:/a:amazon:linux:dotnet-targeting-pack-8.0, p-cpe:/a:amazon:linux:dotnet-templates-8.0, p-cpe:/a:amazon:linux:dotnet8.0-debuginfo, p-cpe:/a:amazon:linux:dotnet8.0-debugsource, p-cpe:/a:amazon:linux:dotnet, p-cpe:/a:amazon:linux:netstandard-targeting-pack-2.1

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

Exploit Ease: No known exploits are available

Patch Publication Date: 8/31/2026

Vulnerability Publication Date: 8/11/2026

Reference Information

CVE: CVE-2026-62899, CVE-2026-62900, CVE-2026-62901, CVE-2026-62909

IAVA: 2026-A-0833

Detections

Analytics