Security Update for .NET Core SDK (July 2020)

high Nessus Plugin ID 138466

Synopsis

The remote Windows host is affected by a .NET Core SDK remote code execution (RCE) vulnerability.

Description

The Microsoft .NET Core SDK installation on the remote host is version 2.1.x < 2.1.516 / 2.1.613 / 2.1.808, or 3.1.x < 3.1.106 / 3.1.302. It is, therefore, affected by a remote code execution vulnerabilty. It is, therefore, affected by a remote code execution (RCE) vulnerability due to failing to check the source markup of XML file input. An unauthenticated, remote attacker can exploit this, by issuing specially crafted requests to applications that process certain types of XML, to execute arbitrary code in the context of the current user.

Solution

Refer to vendor documentation.

See Also

https://dotnet.microsoft.com/download/dotnet-core/3.1

http://www.nessus.org/u?43ad1c2a

https://github.com/dotnet/announcements/issues/159

Plugin Details

Severity: High

ID: 138466

File Name: smb_nt_ms20_jul_dotnet_core_sdk.nasl

Version: 1.10

Type: local

Agent: windows

Family: Windows

Published: 7/14/2020

Updated: 1/21/2022

Configuration: Enable paranoid mode

Supported Sensors: Frictionless Assessment Agent, Nessus Agent

Risk Information

VPR

Risk Factor: Critical

Score: 9

CVSS v2

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

CVSS Score Source: CVE-2020-1147

CVSS v3

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_core

Required KB Items: installed_sw/.NET Core SDK Windows, Settings/ParanoidReport

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 7/14/2020

Vulnerability Publication Date: 7/14/2020

CISA Known Exploited Dates: 5/3/2022

Exploitable With

Metasploit (SharePoint DataSet / DataTable Deserialization)

Reference Information

CVE: CVE-2020-1147