Security Updates for Microsoft .NET Framework (January 2020)

critical Nessus Plugin ID 132999

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New! Vulnerability Priority Rating (VPR)

Tenable calculates a dynamic VPR for every vulnerability. VPR combines vulnerability information with threat intelligence and machine learning algorithms to predict which vulnerabilities are most likely to be exploited in attacks. Read more about what VPR is and how it is different from CVSS.

VPR Score: 7.4

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.

Plugin Details

Severity: Critical

ID: 132999

File Name: smb_nt_ms20_jan_dotnet.nasl

Version: 1.3

Type: local

Agent: windows

Family: Windows : Microsoft Bulletins

Published: 1/16/2020

Updated: 3/26/2020

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

Risk Information

Risk Factor: Critical

VPR Score: 7.4

CVSS Score Source: CVE-2020-0646

CVSS v2.0

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 v3.0

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