# CVE-2020-1161: ASP.NET Core Denial of Service Vulnerability

CVE-2020-1161 is fixed in 11 products on 1 platform, first by RHSA-2020:2250, released May 21, 2020. It is not reported as exploited. Patch Radar priority: High.

- Web page: https://patchblox.com/security/cve/CVE-2020-1161
- Priority: High
- CVSS: 7.5 (Important)
- EPSS: 0.0531
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Vendor exploitability assessment: Exploitation Less Likely
- Published: May 12, 2020
- Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2020-1161

## 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 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | aspnetcore-runtime-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | aspnetcore-targeting-pack-3.1 RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | aspnetcore-targeting-pack-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet RHEL 8 | 0:3.1.104-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet ol 8 | 0:3.1.104-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-apphost-pack-3.1 RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-apphost-pack-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-host RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-host ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-hostfxr-3.1 RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-hostfxr-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-runtime-3.1 RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-runtime-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-sdk-3.1 RHEL 8 | 0:3.1.104-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-sdk-3.1 ol 8 | 0:3.1.104-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-targeting-pack-3.1 RHEL 8 | 0:3.1.4-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-targeting-pack-3.1 ol 8 | 0:3.1.4-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | dotnet-templates-3.1 RHEL 8 | 0:3.1.104-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | dotnet-templates-3.1 ol 8 | 0:3.1.104-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |
| Linux | netstandard-targeting-pack-2.1 RHEL 8 | 0:3.1.104-2.el8_2 | [RHSA-2020:2250](https://patchblox.com/security/data/fix/linux/rhsa-2020-2250.md) | May 21, 2020 |
| Linux | netstandard-targeting-pack-2.1 ol 8 | 0:3.1.104-2.0.2.el8_2 | [ELSA-2020-2250](https://patchblox.com/security/data/fix/linux/elsa-2020-2250.md) | Jun 9, 2020 |

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