Security Update for .NET Core (March 2021)

high Nessus Plugin ID 147946

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Synopsis

The remote Windows host is affected by a .NET Core remote code execution (RCE) vulnerability.

Description

The Microsoft .NET Core installation on the remote host is version 2.1.x prior to 2.1.26, 3.1.x prior to 3.1.13, or 5.x prior to 5.0.4. It is, therefore, affected by a remote code execution vulnerability. An unauthenticated, remote attacker can exploit this to bypass authentication and execute arbitrary commands.

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

Solution

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

Plugin Details

Severity: High

ID: 147946

File Name: smb_nt_ms21_mar_dotnet_core.nasl

Version: 1.4

Type: local

Agent: windows

Family: Windows

Published: 3/22/2021

Updated: 1/9/2024

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

CVSS Score Source: CVE-2021-26701

CVSS v3

Risk Factor: High

Base Score: 8.1

Temporal Score: 7.1

Vector: CVSS:3.0/AV:N/AC:H/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:/a:microsoft:.net_core

Required KB Items: installed_sw/.NET Core Windows

Exploit Ease: No known exploits are available

Patch Publication Date: 3/12/2021

Vulnerability Publication Date: 2/9/2021

Reference Information

CVE: CVE-2021-26701

IAVA: 2021-A-0091-S

Detections

Analytics