Security Update for Microsoft ASP.NET Core (DoS) (August 2020)

Medium Nessus Plugin ID 139496

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's different from CVSS.

VPR Score: 4.4


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


The Microsoft ASP.NET Core installation on the remote host is version 2.1.x < 2.1.21, or 3.1.x < 3.1.7. It is, therefore, affected by a denial of service (DoS) vulnerability when ASP.NET Core improperly handles web requests. An unauthenticated, remote attacker can exploit this issue, via sending a specially crafted requests to the ASP.NET Core application to cause the application to stop responding.


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

See Also

Plugin Details

Severity: Medium

ID: 139496

File Name: smb_nt_ms20_aug_aspdotnet_core.nasl

Version: 1.5

Type: local

Agent: windows

Family: Windows

Published: 2020/08/11

Updated: 2020/09/11

Dependencies: 104667

Risk Information

Risk Factor: Medium

VPR Score: 4.4

CVSS Score Source: CVE-2020-1597

CVSS v2.0

Base Score: 5

Temporal Score: 3.7

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

Temporal Vector: CVSS2#E:U/RL:OF/RC:C

CVSS v3.0

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:N/A:H

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

Vulnerability Information

CPE: cpe:/a:microsoft:aspnet_core

Required KB Items: installed_sw/ASP .NET Core Windows

Exploit Ease: No known exploits are available

Patch Publication Date: 2020/08/11

Vulnerability Publication Date: 2020/08/11

Reference Information

CVE: CVE-2020-1597

IAVA: 2020-A-0354-S