Security Update for .NET Core (July 2020)

high Nessus Plugin ID 138465

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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 < 2.1.20 or 3.1.x < 3.1.6. It is, therefore, affected by a remote code execution (RCE) vulnerability due to failing to check the source markup of XML file input. An unauthenticated, remote attacker can exploit this, by issuing specially crafted requests to applications that process certain types of XML, to execute arbitrary code in the context of the current user.

Solution

Refer to vendor documentation.

Plugin Details

Severity: High

ID: 138465

File Name: smb_nt_ms20_jul_dotnet_core.nasl

Version: 1.13

Type: local

Agent: windows

Family: Windows

Published: 7/14/2020

Updated: 4/25/2023

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: High

Score: 7.4

CVSS v2

Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.6

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

CVSS Score Source: CVE-2020-1147

CVSS v3

Risk Factor: High

Base Score: 7.8

Temporal Score: 7.2

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

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/14/2020

Vulnerability Publication Date: 7/14/2020

CISA Known Exploited Vulnerability Due Dates: 5/3/2022

Exploitable With

Core Impact

Metasploit (SharePoint DataSet / DataTable Deserialization)

Reference Information

CVE: CVE-2020-1147

IAVA: 2020-A-0304-S

Detections

Analytics