Amazon Linux 2023 : aspnetcore-runtime-9.0, aspnetcore-runtime-dbg-9.0, aspnetcore-targeting-pack-9.0 (ALAS2023-2026-2048)

critical Nessus Plugin ID 337201

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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 ALAS2023-2026-2048 advisory.

Authentication bypass by assumed-immutable data in ASP.NET Core allows an authorized attacker to elevate privileges over a network. (CVE-2026-47303)

Improper verification of cryptographic signature in .NET allows an unauthorized attacker to bypass a security feature over a network. (CVE-2026-47304)

Improper validation of specified type of input in .NET Framework allows an unauthorized attacker to deny service over a network. (CVE-2026-50524)

Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network. (CVE-2026-50525)

Improper link resolution before file access ('link following') in .NET allows an authorized attacker to perform tampering locally. (CVE-2026-50526)

Stack-based buffer overflow in .NET Framework allows an unauthorized attacker to deny service over a network. (CVE-2026-50527)

Allocation of resources without limits or throttling in .NET Framework allows an unauthorized attacker to deny service over a network. (CVE-2026-50648)

Deserialization of untrusted data in .NET allows an unauthorized attacker to execute code locally.
(CVE-2026-50649)

Allocation of resources without limits or throttling in .NET allows an unauthorized attacker to deny service over a network. (CVE-2026-50651)

Access of resource using incompatible type ('type confusion') in .NET Core allows an unauthorized attacker to deny service over a network. (CVE-2026-57108)

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 dotnet9.0 --releasever 2023.12.20260817' or or 'dnf update --advisory ALAS2023-2026-2048 --releasever 2023.12.20260817' to update your system.

Plugin Details

Severity: Critical

ID: 337201

File Name: al2023_ALAS2023-2026-2048.nasl

Version: 1.2

Type: Local

Agent: unix

Family: Amazon Linux Local Security Checks

Published: 8/18/2026

Updated: 8/19/2026

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

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.14

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

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

CVSS Score Source: CVE-2026-47304

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 8.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/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-9.0, p-cpe:/a:amazon:linux:aspnetcore-runtime-dbg-9.0, p-cpe:/a:amazon:linux:aspnetcore-targeting-pack-9.0, p-cpe:/a:amazon:linux:dotnet-apphost-pack-9.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-apphost-pack-9.0, p-cpe:/a:amazon:linux:dotnet-host-debuginfo, p-cpe:/a:amazon:linux:dotnet-host, p-cpe:/a:amazon:linux:dotnet-hostfxr-9.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-hostfxr-9.0, p-cpe:/a:amazon:linux:dotnet-runtime-9.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-runtime-9.0, p-cpe:/a:amazon:linux:dotnet-runtime-dbg-9.0, p-cpe:/a:amazon:linux:dotnet-sdk-9.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-sdk-9.0-source-built-artifacts, p-cpe:/a:amazon:linux:dotnet-sdk-9.0, p-cpe:/a:amazon:linux:dotnet-sdk-aot-9.0-debuginfo, p-cpe:/a:amazon:linux:dotnet-sdk-aot-9.0, p-cpe:/a:amazon:linux:dotnet-sdk-dbg-9.0, p-cpe:/a:amazon:linux:dotnet-targeting-pack-9.0, p-cpe:/a:amazon:linux:dotnet-templates-9.0, p-cpe:/a:amazon:linux:dotnet9.0-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: 8/17/2026

Vulnerability Publication Date: 7/14/2026

Reference Information

CVE: CVE-2026-47303, CVE-2026-47304, CVE-2026-50524, CVE-2026-50525, CVE-2026-50526, CVE-2026-50527, CVE-2026-50648, CVE-2026-50649, CVE-2026-50651, CVE-2026-57108

IAVA: 2026-A-0726-S

Detections

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