Security Update for .NET Core (January 2020)

high Nessus Plugin ID 132993
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 remote Windows host is affected by multiple .NET Core vulnerabilities.

Description

The Microsoft .NET Core installation on the remote host is version 3.0.x < 3.0.2 or 3.1.x < 3.1.1. It is, therefore, affected by multiple vulnerabilities:

- 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. 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-2020-0605, CVE-2020-0606)

Solution

Refer to vendor documentation.

See Also

http://www.nessus.org/u?4e287012

http://www.nessus.org/u?fa0a6c3c

https://github.com/dotnet/announcements/issues/148

https://github.com/dotnet/announcements/issues/149

Plugin Details

Severity: High

ID: 132993

File Name: smb_nt_ms20_jan_dotnet_core.nasl

Version: 1.5

Type: local

Agent: windows

Family: Windows

Published: 1/16/2020

Updated: 5/15/2020

Dependencies: microsoft_dotnet_core_win.nbin

Risk Information

CVSS Score Source: CVE-2020-0606

VPR

Risk Factor: Medium

Score: 6.7

CVSS v2

Risk Factor: High

Base Score: 9.3

Temporal Score: 6.9

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

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

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

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

Temporal Vector: 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: 1/14/2020

Vulnerability Publication Date: 1/14/2020

Reference Information

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

IAVA: 2020-A-0031-S