Security Update for .NET Core SDK (June 2021)

medium Nessus Plugin ID 150365


The remote Windows host is affected by a .NET Core SDK denial of service vulnerability.


The Microsoft .NET Core SDK installation on the remote host is version 3.1.x prior to 3.1.116, 3.1.2xx prior to 3.1.410, 5.x prior to 5.0.204, or 5.0.3xx prior to 5.0.301. It is, therefore, affected by a denial of service vulnerability. An unauthenticated, remote attacker can exploit this to cause the application to stop responding.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.


Update .NET Core SDK, remove vulnerable packages and refer to vendor advisory.

See Also

Plugin Details

Severity: Medium

ID: 150365

File Name: smb_nt_ms21_jun_dotnet_core_sdk.nasl

Version: 1.6

Type: local

Agent: windows

Family: Windows

Published: 6/8/2021

Updated: 12/27/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information


Risk Factor: Medium

Score: 4.4


Risk Factor: Medium

Base Score: 5

Temporal Score: 4.1

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

CVSS Score Source: CVE-2021-31957


Risk Factor: Medium

Base Score: 5.9

Temporal Score: 5.5

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:.net_core

Required KB Items: installed_sw/.NET Core SDK Windows

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 6/8/2021

Vulnerability Publication Date: 6/8/2021

Reference Information

CVE: CVE-2021-31957

IAVA: 2021-A-0274-S