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Ubuntu 24.04 LTS / 25.10 : .NET vulnerability (USN-8215-1)

critical Nessus Plugin ID 310931

Synopsis

The remote Ubuntu host is missing a security update.

Description

The remote Ubuntu 24.04 LTS / 25.10 host has packages installed that are affected by a vulnerability as referenced in the USN-8215-1 advisory.

 It was discovered that the Microsoft.AspNetCore.DataProtection library in .NET did not properly verify cryptographic signatures under certain conditions. A remote attacker could possibly use this issue to elevate privileges.

Tenable has extracted the preceding description block directly from the Ubuntu 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

Update the affected packages.

See Also

https://ubuntu.com/security/notices/USN-8215-1

Plugin Details

Severity: Critical

ID: 310931

File Name: ubuntu_USN-8215-1.nasl

Version: 1.1

Type: Local

Agent: unix

Published: 4/29/2026

Updated: 4/29/2026

Supported Sensors: Nessus Agent, 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:C/A:N

CVSS Score Source: CVE-2026-40372

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:H/A:N

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

Vulnerability Information

CPE: p-cpe:/a:canonical:ubuntu_linux:dotnet-targeting-pack-10.0, cpe:/o:canonical:ubuntu_linux:25.10, cpe:/o:canonical:ubuntu_linux:24.04:-:lts, p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-host-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-aot-10.0, p-cpe:/a:canonical:ubuntu_linux:aspnetcore-runtime-dbg-10.0, p-cpe:/a:canonical:ubuntu_linux:aspnetcore-targeting-pack-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet10, p-cpe:/a:canonical:ubuntu_linux:dotnet-templates-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-dbg-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-10.0-source-built-artifacts, p-cpe:/a:canonical:ubuntu_linux:dotnet-apphost-pack-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-runtime-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-sdk-dbg-10.0, p-cpe:/a:canonical:ubuntu_linux:dotnet-hostfxr-10.0

Required KB Items: Host/cpu, Host/Debian/dpkg-l, Host/Ubuntu, Host/Ubuntu/release

Exploit Ease: No known exploits are available

Patch Publication Date: 4/28/2026

Vulnerability Publication Date: 4/21/2026

Reference Information

CVE: CVE-2026-40372

USN: 8215-1