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Fencer Vulns
high 7.5

CVE-2020-1108 json

.NET Core & .NET Framework Denial of Service Vulnerability

published 2020-05-21 6 y ago modified 2026-09-08 2 mo ago also BIT-dotnet-2020-1108 , BIT-dotnet-sdk-2020-1108 , BIT-powershell-2020-1108 , EUVD-2022-2252 , GHSA-3w5p-jhp5-c29q

cvss
7.5
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.5%
EPSS 6.5% chance of exploitation in 30 days, percentile 93%
public exploits
0
none known

Summary

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.

Patch / fix

  • nuget Microsoft.NETCore.App 2.1.18
  • nuget Microsoft.NETCore.App.Runtime.linux-arm 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.linux-arm64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.linux-musl-arm64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.linux-musl-x64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.linux-x64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.osx-x64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.rhel.6-x64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.win-arm 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.win-arm64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.win-x64 3.1.4
  • nuget Microsoft.NETCore.App.Runtime.win-x86 3.1.4
  • dotnet3.1 RHEL 8 3.1.104-2.el8_2
  • dotnet RHEL 8 3.1.104-2.el8_2
  • dotnet-host RHEL 8 3.1.4-2.el8_2
  • dotnet-sdk-3.1 RHEL 8 3.1.104-2.el8_2
  • dotnet-hostfxr-3.1 RHEL 8 3.1.4-2.el8_2
  • dotnet-runtime-3.1 RHEL 8 3.1.4-2.el8_2
  • dotnet-templates-3.1 RHEL 8 3.1.104-2.el8_2
  • aspnetcore-runtime-3.1 RHEL 8 3.1.4-2.el8_2

red hat advisories RHSA-2020:2250RHSA-2020:2249RHSA-2020:2475RHSA-2020:2471RHSA-2020:2476RHSA-2020:2450

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2020-1108 updated cvss 7.5

dotnet: Denial of service via untrusted input

  • Red Hat .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet21 2.1-17.el7, rh-dotnet21 2.1-18.el7, rh-dotnet21-runtime 2.1-17.el7, rh-dotnet21-runtime 2.1-18.el7, rh-dotnet21-dotnet 2.1.514-2.el7, rh-dotnet21-dotnet 2.1.515-1.el7, +30 more Red Hat .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet21 2.1-17.el7, rh-dotnet21 2.1-18.el7, rh-dotnet21-runtime 2.1-17.el7, rh-dotnet21-runtime 2.1-18.el7, rh-dotnet21-dotnet 2.1.514-2.el7, rh-dotnet21-dotnet 2.1.515-1.el7, +30 more Red Hat .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet21 2.1-17.el7, rh-dotnet21 2.1-18.el7, rh-dotnet21-runtime 2.1-17.el7, rh-dotnet21-runtime 2.1-18.el7, rh-dotnet21-dotnet 2.1.514-2.el7, rh-dotnet21-dotnet 2.1.515-1.el7, +30 more
    fixed: vendor fix RHSA-2020:2146
  • Red Hat Enterprise Linux AppStream (v. 8) dotnet 2.1.514-2.el8_2, dotnet 2.1.515-1.el8_2, dotnet 3.1.104-2.el8_2, dotnet 3.1.105-2.el8_2, dotnet-host 3.1.4-2.el8_2, dotnet-host 3.1.5-2.el8_2, +28 more
    fixed: vendor fix RHSA-2020:2250
  • Red Hat Enterprise Linux 8 dotnet, dotnet3.0, dotnet-host, dotnet-sdk-3.0, dotnet-hostfxr-3.0, dotnet-runtime-3.0, +6 more
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

6.46% chance of exploitation in the next 30 days, higher than 93% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 2.0 5.0 AV:N/AC:L/Au:N/C:N/I:N/A:P
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.NETCore.App
>=2.1.0, <2.1.18
2.1.18
nuget Microsoft.NETCore.App.Runtime.linux-arm
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.linux-arm64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.linux-musl-arm64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.linux-musl-x64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.linux-x64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.osx-x64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.rhel.6-x64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.win-arm
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.win-arm64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.win-x64
>=3.1.0, <3.1.4
3.1.4
nuget Microsoft.NETCore.App.Runtime.win-x86
>=3.1.0, <3.1.4
3.1.4
bitnami dotnet
>=5.0-preview1.0, <=5.0-preview1.0
>=5.0-preview2.0, <=5.0-preview2.0
>=5.0-preview3.0, <=5.0-preview3.0
 no fix listed
bitnami dotnet-sdk
>=5.0-preview1.0, <=5.0-preview1.0
>=5.0-preview2.0, <=5.0-preview2.0
>=5.0-preview3.0, <=5.0-preview3.0
 no fix listed
bitnami powershell
>=7.0.0, <=7.0.0
 no fix listed

Affected products

  • Microsoft .NET 5.0
  • Microsoft .NET Core 2.1
  • Microsoft .NET Core 3.1
  • Microsoft Microsoft .NET Framework 2.0 Service Pack 2
  • Microsoft Microsoft .NET Framework 3.0 Service Pack 2
  • Microsoft Microsoft .NET Framework 3.5
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.6/4.6.1/4.6.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.7.2
  • Microsoft Microsoft .NET Framework 3.5 AND 4.8
  • Microsoft Microsoft .NET Framework 3.5.1
  • Microsoft Microsoft .NET Framework 4.5.2
  • Microsoft Microsoft .NET Framework 4.6
  • Microsoft Microsoft .NET Framework 4.6/4.6.1/4.6.2/4.7/4.7.1/4.7.2
  • Microsoft Microsoft .NET Framework 4.8
  • Microsoft Microsoft Visual Studio 2017 version 15.9 (includes 15.0 - 15.8)
  • Microsoft Microsoft Visual Studio 2019 version 16.0
  • Microsoft Microsoft Visual Studio 2019 version 16.4 (includes 16.0 - 16.3)
  • Microsoft Microsoft Visual Studio 2019 version 16.5
  • Microsoft PowerShell 7.0
  • Microsoft PowerShell Core 6.2

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.