# CVE-2020-1597: ASP.NET Core Denial of Service Vulnerability

CVE-2020-1597 is fixed in 11 products on 1 platform, first by RHSA-2020:3422, released August 11, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1597
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0656
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: yes
- Vendor exploitability assessment: Exploitation Less Likely
- Published: Aug 11, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1597

## Description

<p>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.</p> <p>A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application.</p> <p>The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests.</p>

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | aspnetcore-runtime-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | aspnetcore-runtime-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | aspnetcore-targeting-pack-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | aspnetcore-targeting-pack-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet RHEL 8 | 0:3.1.107-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet ol 8 | 0:3.1.107-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-apphost-pack-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-apphost-pack-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-host RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-host ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-hostfxr-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-hostfxr-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-runtime-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-runtime-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-sdk-3.1 RHEL 8 | 0:3.1.107-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-sdk-3.1 ol 8 | 0:3.1.107-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-targeting-pack-3.1 RHEL 8 | 0:3.1.7-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-targeting-pack-3.1 ol 8 | 0:3.1.7-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | dotnet-templates-3.1 RHEL 8 | 0:3.1.107-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | dotnet-templates-3.1 ol 8 | 0:3.1.107-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |
| Linux | netstandard-targeting-pack-2.1 RHEL 8 | 0:3.1.107-1.el8_2 | [RHSA-2020:3422](https://patchblox.com/security/data/fix/linux/rhsa-2020-3422.md) | Aug 11, 2020 |
| Linux | netstandard-targeting-pack-2.1 ol 8 | 0:3.1.107-1.0.1.el8_2 | [ELSA-2020-3422](https://patchblox.com/security/data/fix/linux/elsa-2020-3422.md) | Aug 16, 2020 |

---

Data as of 2026-11-08T00:53:09Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data

Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.