Security Update for Microsoft ASP.NET Core (September 2020)

high Nessus Plugin ID 140425

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Synopsis

The Microsoft ASP.NET Core installations on the remote host contain vulnerable packages.

Description

The Microsoft ASP.NET Core installation on the remote host is version 2.1.x < 2.1.22, or 3.1.x < 3.1.8. It is, therefore, affected by a security feature bypass vulnerability in the way ASP.NET Core parses encoded cookie names. An unauthenticated, remote attacker can exploit this issue, by sending a specially crafted cookies to the ASP.NET Core application to set a second cookie.

Solution

Update ASP.NET Core, remove vulnerable packages and refer to vendor advisory.

Plugin Details

Severity: High

ID: 140425

File Name: smb_nt_ms20_sep_aspdotnet_core.nasl

Version: 1.8

Type: local

Agent: windows

Family: Windows

Published: 9/8/2020

Updated: 12/6/2022

Configuration: Enable thorough checks

Supported Sensors: Frictionless Assessment Agent, Nessus Agent, Nessus

Risk Information

VPR

Risk Factor: Medium

Score: 4.4

CVSS v2

Risk Factor: Medium

Base Score: 5

Temporal Score: 3.7

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:P/A:N

CVSS Score Source: CVE-2020-1045

CVSS v3

Risk Factor: High

Base Score: 7.5

Temporal Score: 6.5

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

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

CPE: cpe:/a:microsoft:asp.net_core

Required KB Items: installed_sw/ASP .NET Core Windows

Exploit Ease: No known exploits are available

Patch Publication Date: 9/8/2020

Vulnerability Publication Date: 9/8/2020

Reference Information

CVE: CVE-2020-1045

IAVA: 2020-A-0415-S

Detections

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