Security Updates for Microsoft .NET Framework (July 2020)

high Nessus Plugin ID 138464
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The Microsoft .NET Framework installation on the remote host is missing a security update.


The Microsoft .NET Framework installation on the remote host is missing a security update. It is, therefore, affected by the following vulnerability :

- A remote code execution vulnerability exists in .NET Framework, Microsoft SharePoint, and Visual Studio when the software fails to check the source markup of XML file input. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the process responsible for deserialization of the XML content. (CVE-2020-1147)


Microsoft has released security updates for Microsoft .NET Framework.

See Also

Plugin Details

Severity: High

ID: 138464

File Name: smb_nt_ms20_jul_dotnet.nasl

Version: 1.10

Type: local

Agent: windows

Published: 7/14/2020

Updated: 1/21/2022

Dependencies: smb_check_dotnet_rollup.nasl, smb_hotfixes.nasl, ms_bulletin_checks_possible.nasl, microsoft_net_framework_installed.nasl

Risk Information

CVSS Score Source: CVE-2020-1147


Risk Factor: Critical

Score: 9


Risk Factor: Medium

Base Score: 6.8

Temporal Score: 5.9

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

Temporal Vector: E:H/RL:OF/RC:C


Risk Factor: High

Base Score: 7.8

Temporal Score: 7.5

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

Temporal Vector: E:H/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:.net_framework

Required KB Items: SMB/MS_Bulletin_Checks/Possible

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/14/2020

Vulnerability Publication Date: 7/14/2020

Exploitable With

Metasploit (SharePoint DataSet / DataTable Deserialization)

Reference Information

CVE: CVE-2020-1147

IAVA: 2020-A-0305-S

MSKB: 4565489, 4565508, 4565511, 4565513, 4565627, 4565628, 4565630, 4565631, 4565633, 4566466, 4566467, 4566468, 4566469, 4566516, 4566517, 4566518, 4566519, 4566520

MSFT: MS20-4565489, MS20-4565508, MS20-4565511, MS20-4565513, MS20-4565627, MS20-4565628, MS20-4565630, MS20-4565631, MS20-4565633, MS20-4566466, MS20-4566467, MS20-4566468, MS20-4566469, MS20-4566516, MS20-4566517, MS20-4566518, MS20-4566519, MS20-4566520