Security Updates for Microsoft .NET Framework (January 2020)

critical Nessus Plugin ID 132999
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.

Synopsis

The Microsoft .NET Framework installation on the remote host is affected by multiple vulnerabilities.

Description

The Microsoft .NET Framework installation on the remote host is missing security updates. It is, therefore, affected by multiple vulnerabilities :

- A remote code execution vulnerability exists when the Microsoft .NET Framework fails to validate input properly. An attacker who successfully exploited this vulnerability could take control of an affected system.
An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights.
(CVE-2020-0646)

- A remote code execution vulnerability exists in .NET software when the software fails to check the source markup of a file. An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user. If the current user is logged on with administrative user rights, an attacker could take control of the affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
(CVE-2020-0605, CVE-2020-0606)

Solution

Microsoft has released security updates for Microsoft .NET Framework.

See Also

http://www.nessus.org/u?71a4b34c

http://www.nessus.org/u?6dd1d619

https://support.microsoft.com/en-us/help/4535103/kb4535103

https://support.microsoft.com/en-us/help/4535102/kb4535102

https://support.microsoft.com/en-us/help/4535105/kb4535105

https://support.microsoft.com/en-us/help/4535104/kb4535104

http://www.nessus.org/u?d6758a7c

http://www.nessus.org/u?e147f537

http://www.nessus.org/u?0f331705

http://www.nessus.org/u?2fd98f0c

https://support.microsoft.com/en-us/help/4534977/kb4534977

https://support.microsoft.com/en-us/help/4534976/kb4534976

http://www.nessus.org/u?4bff0836

http://www.nessus.org/u?3c9c3e46

http://www.nessus.org/u?56c0e39b

https://support.microsoft.com/en-us/help/4534979/kb4534979

https://support.microsoft.com/en-us/help/4534978/kb4534978

Plugin Details

Severity: Critical

ID: 132999

File Name: smb_nt_ms20_jan_dotnet.nasl

Version: 1.6

Type: local

Agent: windows

Published: 1/16/2020

Updated: 11/30/2021

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-2020-0646

VPR

Risk Factor: High

Score: 8.4

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 8.3

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

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

CVSS v3

Risk Factor: Critical

Base Score: 9.8

Temporal Score: 9.1

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

Temporal Vector: E:F/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: 1/14/2020

Vulnerability Publication Date: 1/14/2020

Exploitable With

Metasploit (SharePoint Workflows XOML Injection)

Reference Information

CVE: CVE-2020-0605, CVE-2020-0606, CVE-2020-0646

MSKB: 4532935, 4535101, 4535103, 4535102, 4535105, 4535104, 4532933, 4534271, 4532938, 4534306, 4534977, 4534976, 4532936, 4534276, 4534293, 4534979, 4534978

MSFT: MS20-4532935, MS20-4535101, MS20-4535103, MS20-4535102, MS20-4535105, MS20-4535104, MS20-4532933, MS20-4534271, MS20-4532938, MS20-4534306, MS20-4534977, MS20-4534976, MS20-4532936, MS20-4534276, MS20-4534293, MS20-4534979, MS20-4534978

IAVA: 2020-A-0028-S