Security Update for .NET Core (January 2020)

high Nessus Plugin ID 132993
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: 6.7

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

Risk Factor: High

VPR Score: 6.7

CVSS Score Source: CVE-2020-0606

CVSS v2.0

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 v3.0

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