Security Update for Microsoft .NET Core SDK (February 2024)

high Nessus Plugin ID 190486

Synopsis

The remote Windows host is affected by multiple Microsoft .NET Core SDK vulnerabilities.

Description

The version of .NET Core SDK installed on the remote host is 6.x prior to 6.0.27, 7.x prior to 7.0.16 or 8.x prior to 8.0.2. It is, therefore, affected by multiple vulnerabilities as referenced in the February 2024 advisory:

- A vulnerability exists in ASP.NET applications using SignalR where a malicious client can result in a denial-of-service. (CVE-2024-21386)

- A denial-of-service vulnerability exists in .NET with OpenSSL support when parsing X509 certificates.
(CVE-2024-21404)

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

Solution

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

See Also

https://dotnet.microsoft.com/en-us/download/dotnet/6.0

https://dotnet.microsoft.com/en-us/download/dotnet/7.0

https://dotnet.microsoft.com/en-us/download/dotnet/8.0

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2024-21386

https://msrc.microsoft.com/update-guide/en-US/advisory/CVE-2024-21404

http://www.nessus.org/u?c1164fe6

http://www.nessus.org/u?94253799

http://www.nessus.org/u?4010ce73

http://www.nessus.org/u?fa29660f

http://www.nessus.org/u?e8058f91

http://www.nessus.org/u?0b5f551d

Plugin Details

Severity: High

ID: 190486

File Name: smb_nt_ms24_feb_dotnet_core_sdk.nasl

Version: 1.4

Type: local

Agent: windows

Family: Windows

Published: 2/13/2024

Updated: 4/8/2024

Configuration: Enable paranoid mode

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: High

Base Score: 7.8

Temporal Score: 5.8

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

CVSS Score Source: CVE-2024-21404

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

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

Vulnerability Information

CPE: cpe:/a:microsoft:.net_core

Required KB Items: installed_sw/.NET Core SDK Windows, Settings/ParanoidReport

Exploit Ease: No known exploits are available

Patch Publication Date: 2/13/2024

Vulnerability Publication Date: 2/13/2024

Reference Information

CVE: CVE-2024-21386, CVE-2024-21404

IAVA: 2024-A-0089-S

MSKB: 5035119, 5035120, 5035121