Home/CVE/A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests, aka '.NET Cor
CVE

CVE-2020-1108

A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests, aka '.NET Cor

A denial of service vulnerability exists when .NET Core or .NET Framework improperly handles web requests, aka '.NET Core & .NET Framework Denial of Service Vulnerability'.

HIGH · CVSS 7.5 EPSS 0.03788
Schedule remediation
  • CVSS base score ≥ 7.0
Sigma rules15 YARA rules0
▤

Affected Products & Versions

9
microsoft .netall versions
microsoft .net core>= 2.1 and <= 2.1.18
microsoft .net core>= 3.0 and <= 3.1.4
microsoft .net frameworkall versions
microsoft .net coreall versions
microsoft visual studio 2017all versions
microsoft visual studio 2019all versions
microsoft powershellall versions
▤

Affected Packages

12
Language-ecosystem packages (from OSV) tied to this CVE, with the version that fixes it - the dependency-level detail NVD doesn’t carry.
NuGet Microsoft.NETCore.App HIGH fixed in 2.1.18
NuGet Microsoft.NETCore.App.Runtime.linux-arm HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.linux-arm64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.linux-musl-arm64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.linux-musl-x64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.linux-x64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.osx-x64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.rhel.6-x64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.win-arm HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.win-arm64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.win-x64 HIGH fixed in 3.1.4
NuGet Microsoft.NETCore.App.Runtime.win-x86 HIGH fixed in 3.1.4
◈

Sigma Hunt Rules

15
Exact rules name this CVE ID. Product rules name an affected product in their title. Related rules cover techniques used by actors who exploited this CVE. Showing the most relevant matches; the complete related set is on the full drill-down.
productmediumPowerShell Core DLL Loaded Via Office Application
productmediumPowerShell Core DLL Loaded By Non PowerShell Process
productcriticalBad Opsec Powershell Code Artifacts
productcriticalSuspicious PowerShell Mailbox Export to Share - PS
productcriticalSuspicious PowerShell Mailbox Export to Share
productcriticalHackTool - Empire PowerShell UAC Bypass
▣

Scoring & Timeline

7.5
HIGH · CVSS v3.1 · secure@microsoft.com
View on NVD
Attack Vector
Network Adjacent Local Physical
Attack Complexity
Low High
Privileges Required
None Low High
User Interaction
None Required
Scope
Unchanged Changed
Confidentiality
None Low High
Integrity
None Low High
Availability
None Low High
Published to NVD21 May 2020 · 11:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
⚑

Vendor Advisories

9
msrcCVE-2020-1108Denial of Service
rhsaRHSA-2020:2475Important
rhsaRHSA-2020:2146Important
rhsaRHSA-2020:2476Important
rhsaRHSA-2020:2143Important
🔗

References & Sources

1
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1108PatchVendor Advisory
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