A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.

An update of the dotnet package has been released.

There are packages installed that are affected by a vulnerability referenced in the following CVE:

  - A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker
    who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web
    application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated
    attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core
    application. The update addresses the vulnerability by correcting how the ASP.NET Core web application
    handles web requests. (CVE-2020-1597)

The remote NewStart CGSL host, running version MAIN 6.02, has dotnet3.1 packages installed that are affected by a vulnerability:

  - A denial of service vulnerability exists when ASP.NET Core improperly handles web requests, aka 'ASP.NET     Core Denial of Service Vulnerability'. (CVE-2020-1597)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote CentOS Linux 8 host has packages installed that are affected by a vulnerability as referenced in the CESA-2020:3422 advisory.

  - dotnet: ASP.NET Core Resource Consumption Denial of Service (CVE-2020-1597)

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

Update to .NET Core SDK 3.1.107 and Runtime 3.1.7.

This fixes CVE-2020-1597

  - Release Notes:
    https://github.com/dotnet/core/blob/master/release-notes     /3.1/3.1.7/3.1.7.md

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

The remote Oracle Linux 8 host has packages installed that are affected by a vulnerability as referenced in the ELSA-2020-3422 advisory.

    [3.1.107-1.0.1]
    - Update patch to support 8.2 (alexander.burmashev@oracle.com)
    - support OL release scheme (alexander.burmashev@oracle.com)

    [3.1.107-1]
    - Update to .NET Core Runtime 3.1.7 and SDK 3.1.107
    - Resolves: RHBZ#1862593
    - Resolves: RHBZ#1861113

Tenable has extracted the preceding description block directly from the Oracle Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 8 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:3422 advisory.

    .NET Core is a managed-software framework. It implements a subset of the .NET framework APIs and several     new APIs, and it includes a CLR implementation.

    New versions of .NET Core that address security vulnerabilities are now available. The updated versions     are .NET Core SDK 3.1.107 and .NET Core Runtime 3.1.7.

    Security Fixes:

    * .NET Core: ASP.NET Core Resource Consumption Denial of Service (CVE-2020-1597)

    Default inclusions for applications built with .NET Core have been updated to reference the newest     versions and their security fixes.

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The remote Redhat Enterprise Linux 7 host has packages installed that are affected by a vulnerability as referenced in the RHSA-2020:3421 advisory.

    .NET Core is a managed-software framework. It implements a subset of the .NET framework APIs and several     new APIs, and it includes a CLR implementation.

    New versions of .NET Core that address a security vulnerability are now available. The updated versions     are .NET Core SDK 3.1.107 and .NET Core Runtime 3.1.7.

    Security Fix(es):

    * .NET Core: ASP.NET Core Resource Consumption Denial of Service (CVE-2020-1597)

    Default inclusions for applications built with .NET Core have been updated to reference the newest     versions and their security fixes.

    For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and     other related information, refer to the CVE page(s) listed in the References section.

Tenable has extracted the preceding description block directly from the Red Hat Enterprise Linux security advisory.

Note that Nessus has not tested for this issue but has instead relied only on the application's self-reported version number.

The Microsoft Visual Studio Products are missing security updates. It is, therefore, affected by a denial-of-service vulnerability:

  - A denial of service vulnerability exists when ASP.NET     Core improperly handles web requests. An attacker who     successfully exploited this vulnerability could cause a     denial of service against an ASP.NET Core web     application. The vulnerability can be exploited     remotely, without authentication. A remote     unauthenticated attacker could exploit this     vulnerability by issuing specially crafted requests to     the ASP.NET Core application. The update addresses the     vulnerability by correcting how the ASP.NET Core web     application handles web requests. (CVE-2020-1597)

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.

ID	Name	Product	Family	Severity
237067	Photon OS 4.0: Dotnet PHSA-2025-4.0-0804	Nessus	PhotonOS Local Security Checks	high
414395	SCA: security update for Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, Microsoft.AspNetCore.App.Runtime.linux-arm, Microsoft.AspNetCore.App.Runtime.linux-arm64, Microsoft.AspNetCore.App.Runtime.linux-musl-arm64, Microsoft.AspNetCore.App.Runtime.linux-musl-x64, Microsoft.AspNetCore.App.Runtime.linux-x64, Microsoft.AspNetCore.App.Runtime.osx-x64, Microsoft.AspNetCore.App.Runtime.win-arm, Microsoft.AspNetCore.App.Runtime.win-arm64, Microsoft.AspNetCore.App.Runtime.win-x64, Microsoft.AspNetCore.App.Runtime.win-x86 (GHSA-f8qx-mjcq-wfgx)	Tenable Cloud Security	SCA Checks	high
414395	SCA: security update for Microsoft.AspNetCore.All, Microsoft.AspNetCore.App, Microsoft.AspNetCore.App.Runtime.linux-arm, Microsoft.AspNetCore.App.Runtime.linux-arm64, Microsoft.AspNetCore.App.Runtime.linux-musl-arm64, Microsoft.AspNetCore.App.Runtime.linux-musl-x64, Microsoft.AspNetCore.App.Runtime.linux-x64, Microsoft.AspNetCore.App.Runtime.osx-x64, Microsoft.AspNetCore.App.Runtime.win-arm, Microsoft.AspNetCore.App.Runtime.win-arm64, Microsoft.AspNetCore.App.Runtime.win-x64, Microsoft.AspNetCore.App.Runtime.win-x86 (GHSA-f8qx-mjcq-wfgx)	Tenable Self-Hosted Container Security	SCA Checks	high
147356	NewStart CGSL MAIN 6.02 : dotnet3.1 Vulnerability (NS-SA-2021-0055)	Nessus	NewStart CGSL Local Security Checks	high
146005	CentOS 8 : .NET Core 3.1 (CESA-2020:3422)	Nessus	CentOS Local Security Checks	high
140555	Fedora 32 : dotnet-build-reference-packages / dotnet3.1 (2020-cad5d17c6d)	Nessus	Fedora Local Security Checks	high
139613	Oracle Linux 8 : .NET / Core / 3.1 (ELSA-2020-3422)	Nessus	Oracle Linux Local Security Checks	high
139515	RHEL 8 : .NET Core 3.1 (RHSA-2020:3422)	Nessus	Red Hat Local Security Checks	high
139511	RHEL 7 : .NET Core 3.1 security and bugfix update for Red Hat Enterprise Linux (Important) (RHSA-2020:3421)	Nessus	Red Hat Local Security Checks	high
139506	Security Updates for Microsoft Visual Studio Products (August 2020)	Nessus	Windows : Microsoft Bulletins	high
139496	Security Update for Microsoft ASP.NET Core (DoS) (August 2020)	Nessus	Windows	high

Detections

Analytics

CVE-2020-1597

high

Tenable Plugins

high

high

high

high

high

high

high

high

high

high

high