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TI-2020-00580 Aliases CVE-2020-0603GHSA-655q-9gvg-q4cm

Out-of-bounds write in Microsoft ASP.NET Core

Priority MEDIUM 58CWE-787Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-787 and the CVSS impact.

Summary

A remote code execution vulnerability exists in ASP.NET Core software when the software fails to handle objects in memory.An attacker who successfully exploited the vulnerability could run arbitrary code in the context of the current user, aka 'ASP.NET Core Remote Code Execution Vulnerability'.

Why it matters now

EPSS 0.22561 97th percentileScored 2026-11-07
Fix Fixed Microsoft.AspNetCore.All (NuGet): 2.1.15Microsoft.AspNetCore.App (NuGet): 3.1.1, 3.0.1, 2.1.15+10 more productsRed Hat: 2 advisories

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
MicrosoftASP.NET Core2.1; 3.0; 3.1—No fix listedCNA
—Microsoft.AspNetCore.All (NuGet)2.1.0 to before 2.1.152.1.15Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App (NuGet)3.0.0 to before 3.0.13.0.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App (NuGet)2.1.0 to before 2.1.152.1.15Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.Http.Connections (NuGet)1.0.0 to before 1.0.151.0.15Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.win-arm (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
—Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet)3.1.0 to before 3.1.13.1.1Patch availableGHSA-655q-9gvg-q4cm
  • ASP.NET Core VendorMicrosoft Affected 2.1; 3.0; 3.1 Fixed in — No fix listed CNA
  • Microsoft.AspNetCore.All (NuGet) Vendor— Affected 2.1.0 to before 2.1.15 Fixed in 2.1.15 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App (NuGet) Vendor— Affected 3.0.0 to before 3.0.1 Fixed in 3.0.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App (NuGet) Vendor— Affected 2.1.0 to before 2.1.15 Fixed in 2.1.15 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.Http.Connections (NuGet) Vendor— Affected 1.0.0 to before 1.0.15 Fixed in 1.0.15 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm
  • Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Vendor— Affected 3.1.0 to before 3.1.1 Fixed in 3.1.1 Patch available GHSA-655q-9gvg-q4cm

CPE configurations NVD · 5

CPEVersionsRoleVendor
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*2.1VulnerableMicrosoft
cpe:2.3:a:microsoft:asp.net_core:3.0:*:*:*:*:*:*:*3.0VulnerableMicrosoft
cpe:2.3:a:microsoft:asp.net_core:3.1:*:*:*:*:*:*:*3.1VulnerableMicrosoft
cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*8.0VulnerableRed Hat
cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:*8.1VulnerableRed Hat
  • cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:* Versions 2.1 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:asp.net_core:3.0:*:*:*:*:*:*:* Versions 3.0 Vulnerable ·Microsoft
  • cpe:2.3:a:microsoft:asp.net_core:3.1:*:*:*:*:*:*:* Versions 3.1 Vulnerable ·Microsoft
  • cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:* Versions 8.0 Vulnerable ·Red Hat
  • cpe:2.3:o:redhat:enterprise_linux_eus:8.1:*:*:*:*:*:*:* Versions 8.1 Vulnerable ·Red Hat

Remediation

  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.All (NuGet) Fixed in 2.1.15 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App (NuGet) Fixed in 3.0.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App (NuGet) Fixed in 2.1.15 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.Http.Connections (NuGet) Fixed in 1.0.15 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.linux-arm (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.linux-arm64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.linux-musl-arm64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.linux-musl-x64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.linux-x64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.osx-x64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.win-arm (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.win-x64 (NuGet) Fixed in 3.1.1 Advisory →
  • Fix · GHSA-655q-9gvg-q4cm Microsoft.AspNetCore.App.Runtime.win-x86 (NuGet) Fixed in 3.1.1 Advisory →

Red Hat 2 advisories

  • RHSA-2020:0134 Released 2020-01-16 · Red Hat rating Critical
    .NET Core on Red Hat Enterprise Linux security and bug fix update
    • .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet30-aspnetcore-runtime-3.0-3.0.2-3.el7, rh-dotnet30-aspnetcore-targeting-pack-3.0-3.0.2-3.el7, rh-dotnet30-dotnet-3.0.102-3.el7 +19
    • .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet30-aspnetcore-runtime-3.0-3.0.2-3.el7, rh-dotnet30-aspnetcore-targeting-pack-3.0-3.0.2-3.el7, rh-dotnet30-dotnet-3.0.102-3.el7 +19
    • .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet30-aspnetcore-runtime-3.0-3.0.2-3.el7, rh-dotnet30-aspnetcore-targeting-pack-3.0-3.0.2-3.el7, rh-dotnet30-dotnet-3.0.102-3.el7 +19
  • RHSA-2020:0130 Released 2020-01-16 · Red Hat rating Critical
    .NET Core on Red Hat Enterprise Linux security and bug fix update
    • Red Hat Enterprise Linux AppStream (v. 8) aspnetcore-runtime-3.0-3.0.2-2.el8_1, aspnetcore-targeting-pack-3.0-3.0.2-2.el8_1, dotnet-3.0.102-2.el8_1 +9

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Advisory ·

    Microsoft ASP.NET Core — RHSA-2020:0130

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2020-00579 Uncontrolled resource consumption in Microsoft ASP.NET CorePriority MEDIUM 44
    Show all 2 records → Advisory →
  • Advisory ·

    Microsoft ASP.NET Core — RHSA-2020:0134

    2 records Highest priority Priority MEDIUM 2 MEDIUM

    Other records, highest priority first

    • TI-2020-00579 Uncontrolled resource consumption in Microsoft ASP.NET CorePriority MEDIUM 44
    Show all 2 records → Advisory →

Vendor assessments

Red Hat

Red Hat rating: Critical. Red Hat's page for this CVE →

ProductStatusPlan or fix
.NET Core on Red Hat Enterprise Linux ComputeNode (v. 7)Fixed RHSA-2020:0134
.NET Core on Red Hat Enterprise Linux Server (v. 7)Fixed RHSA-2020:0134
.NET Core on Red Hat Enterprise Linux Workstation (v. 7)Fixed RHSA-2020:0134
Red Hat Enterprise Linux AppStream (v. 8)Fixed RHSA-2020:0130
Not affected: 3 products
  • .NET Core 2.1 on Red Hat Enterprise Linux
  • .NET Core 2.2 on Red Hat Enterprise Linux
  • Red Hat Enterprise Linux 8

Timeline

  1. 2026-10-02 Threatist record created from CVE-2020-0603
  2. 2026-10-03 Alias added: GHSA-655q-9gvg-q4cm

References

Patch 1

Advisory 3

Other 2

  • TI-2023-23979 The HTTP/2 protocol allows a denial of service (server resource consumption) because… KEVCVSS 3.1HIGH 7.5
  • TI-2023-19596 .NET and Visual Studio Denial of Service Vulnerability KEVCVSS 3.1HIGH 7.5
  • TI-2025-34970 ASP.NET Security Feature Bypass Vulnerability CVSS 3.1CRITICAL 9.9
  • TI-2024-14164 .NET Denial of Service Vulnerability CVSS 3.1HIGH 7.5
  • TI-2023-18092 ASP.NET Core Denial of Service Vulnerability CVSS 3.1HIGH 8.2
  • TI-2023-18392 ASP.NET Core Security Feature Bypass Vulnerability CVSS 3.1MEDIUM 6.2
See all 40 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences