CVE-2020-1108: .NET Core & .NET Framework Denial of Service Vulnerability

Published May 12, 2020
·
Updated

.NET Core & .NET Framework Denial of Service Vulnerability

Other sources

A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against a .NET Core or .NET Framework 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 .NET Core or .NET Framework application. The update addresses the vulnerability by correcting how the .NET Core or .NET Framework web application handles web requests.

— Microsoft

Affected Software

210 affected componentsFixes available
Microsoft .NET=5.0-preview1
Microsoft .NET=5.0-preview2
Microsoft .NET=5.0-preview3
Microsoft .NET Core>=2.1<=2.1.18
Microsoft .NET Core>=3.0<=3.1.4
Microsoft .NET Framework=2.0-sp2
Microsoft .NET Framework=3.0-sp2
Microsoft .NET Framework=4.6
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=sp2
Microsoft .NET Framework=3.5
Microsoft Windows 8.1
Microsoft Windows 8.1
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
Microsoft Windows 10=1607
Microsoft Windows 10=1607
Microsoft Windows Server 2016
Microsoft Windows 10
Microsoft Windows 10
Microsoft Windows 10=1709
Microsoft Windows 10=1709
Microsoft Windows 10=1709
Microsoft Windows 10=1803
Microsoft Windows 10=1803
Microsoft Windows 10=1809
Microsoft Windows Server 2019
Microsoft Windows 10=1909
Microsoft Windows 10=1909
Microsoft Windows 10=1903
Microsoft Windows 10=1903
Microsoft Windows 10=1903
Microsoft Windows 10=1909
Microsoft .NET Framework=3.5.1
Microsoft Windows 7=sp1
Microsoft Windows 7=sp1
Microsoft Windows 10=1803
Microsoft Windows RT 8.1
Microsoft .NET Core=2.1
Microsoft .NET Core=3.1
Microsoft Visual Studio 2017=15.9
Microsoft Visual Studio 2019=16.0
Microsoft Visual Studio 2019=16.4
Microsoft Visual Studio 2019=16.5
Microsoft PowerShell=7.0
Microsoft PowerShell Core=6.2
Microsoft .NET Framework=3.5, =4.8
Microsoft .NET Framework=3.5.1
Microsoft .NET Framework=3.5, =4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.8
Microsoft .NET Framework=4.6, =4.6.1, =4.6.2, =4.7, =4.7.1, =4.7.2
Microsoft .NET Framework=4.6, =4.6.1, =4.6.2, =4.7, =4.7.1, =4.7.2
Microsoft .NET Framework=4.6, =4.6.1, =4.6.2, =4.7, =4.7.1, =4.7.2
Microsoft .NET 5.0
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6, =4.6.1, =4.6.2, =4.7, =4.7.1, =4.7.2
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=3.5, =4.6, =4.6.1, =4.6.2
Microsoft PowerShell 7.0
Microsoft .NET Framework=3.5, =4.7.2
Microsoft .NET Framework=3.5, =4.7.1, =4.7.2
Microsoft PowerShell Core=6.2
Microsoft Visual Studio 2019 (includes 16.0 - 16.3)=16.4
Microsoft Visual Studio 2019=16.0
Microsoft Visual Studio 2017 (includes 15.0 - 15.8)=15.9
Microsoft .NET Framework=3.5
Microsoft .NET Framework=3.5
Microsoft .NET Core=3.1
Microsoft .NET Core=2.1
Microsoft .NET Framework=3.0
Microsoft .NET Framework=4.6
Microsoft Visual Studio 2019=16.5
Microsoft .NET Framework=2.0
Microsoft .NET Framework=3.5, =4.6.2, =4.7, =4.7.1, =4.7.2
Microsoft .NET Framework=3.5, =4.7.2
All of the following
Any of the following
Microsoft .NET Framework=2.0-sp2
Microsoft .NET Framework=3.0-sp2
Microsoft .NET Framework=4.6
Any of the following
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2008=sp2
All of the following
Microsoft .NET Framework=3.5
Any of the following
Microsoft Windows 8.1
Microsoft Windows 8.1
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows Server 2012
Microsoft Windows Server 2012=r2
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1607
Microsoft Windows 10=1607
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Microsoft Windows Server 2016
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Any of the following
Microsoft Windows 10
Microsoft Windows 10
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1709
Microsoft Windows 10=1709
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft Windows 10=1709
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1803
Microsoft Windows 10=1803
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1809
Microsoft Windows Server 2019
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1909
Microsoft Windows 10=1909
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1903
Microsoft Windows 10=1903
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 10=1903
Microsoft Windows 10=1909
All of the following
Any of the following
Microsoft .NET Framework=3.5.1
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Any of the following
Microsoft Windows 7=sp1
Microsoft Windows 7=sp1
All of the following
Any of the following
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft Windows 8.1
All of the following
Any of the following
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Microsoft Windows 8.1
All of the following
Microsoft .NET Framework=4.5.2
Any of the following
Microsoft Windows Server 2008=sp2
Microsoft Windows Server 2012=r2
All of the following
Microsoft .NET Framework=4.5.2
Microsoft Windows Server 2008=sp2
All of the following
Any of the following
Microsoft .NET Framework=3.5
Microsoft .NET Framework=4.7.2
Microsoft Windows 10=1803
All of the following
Microsoft .NET Framework=4.5.2
Any of the following
Microsoft Windows 7=sp1
Microsoft Windows 7=sp1
All of the following
Any of the following
Microsoft .NET Framework=4.5.2
Microsoft .NET Framework=4.6
Microsoft .NET Framework=4.6.1
Microsoft .NET Framework=4.6.2
Microsoft .NET Framework=4.7
Microsoft .NET Framework=4.7.1
Microsoft .NET Framework=4.7.2
Microsoft .NET Framework=4.8
Microsoft Windows RT 8.1

Remediation

Recommended actions to resolve this vulnerability, in priority order.

  1. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4552931
  2. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556403
  3. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556441
  4. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556404
  5. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556405
  6. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556401
  7. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4552926
  8. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4552929
  9. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4552928
  10. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556406
  11. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556826
  12. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556807
  13. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556812
  14. Upgrade

    Upgrade to a fixed release to a version that resolves this vulnerability.

    Patch KB4556813

Event History

May 12, 2020
CVE Published
via Microsoft·02:00 PM
Data Sourced
via Microsoft·02:00 PM
DescriptionSeverityWeaknessAffected Software
Updated
via Microsoft·02:00 PM
Affected Software
Updated
via Microsoft·02:00 PM
Description
May 21, 2020
CVE Published
via MITRE·10:53 PM
Data Sourced
via MITRE·10:53 PM
Description
Data Sourced
via NVD·11:15 PM
RemedyDescriptionSeverityAffected Software

Frequently Asked Questions

1

What is the vulnerability ID of this denial of service vulnerability?

The vulnerability ID of this denial of service vulnerability is CVE-2020-1108.

2

What is the severity level of CVE-2020-1108?

CVE-2020-1108 has a severity level of high, with a CVSS score of 7.5.

3

Which software is affected by CVE-2020-1108?

CVE-2020-1108 affects .NET Core, .NET Framework, and other related software versions.

4

How does CVE-2020-1108 manifest as a vulnerability?

CVE-2020-1108 is a denial of service vulnerability that occurs due to improper handling of web requests in .NET Core and .NET Framework.

5

Where can I find more information about CVE-2020-1108?

More information about CVE-2020-1108 can be found at the following reference link: [CVE-2020-1108](https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1108).

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