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CVE-2019-0564

27
FAUCET Score

CVE-2019-0564 is a denial-of-service vulnerability affecting ASP.NET Core 2.1, where improper handling of web requests can lead to service disruption. This vulnerability carries a high CVSS score of 7.5, indicating it can be exploited remotely with low attack complexity to achieve a complete denial of service. While no public exploit code or active exploitation is reported, the vulnerability has garnered some community discussion and media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
2.1CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

7.5HIGH

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
3.6
CvssVersion
3.0

Exploit Intelligence

EPSS Score
8.39%
Probability of exploitation in next 30 days
EPSS Percentile
94.4%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0839 is in the 91st percentile among its peer group of 51,551 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.1 Mastodon, and 0.4 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (18)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: PowerShell Core 6.1
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.1
View patch
microsoftpatch availablevia msrc
Product: PowerShell Core 6.2
View patch
nugetpatch availablevia ghsa
Product: Microsoft.NETCore.AppFixed in: 2.2.1
nugetpatch availablevia ghsa
Product: Microsoft.NETCore.AppFixed in: 2.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 2.2.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AppFixed in: 2.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.2.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.WebSocketsFixed in: 2.2.1
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.AllFixed in: 2.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.WebSocketsFixed in: 2.1.7
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.Kestrel.CoreFixed in: 2.1.7
nugetpatch availablevia ghsa
Product: System.Net.WebSockets.WebSocketProtocolFixed in: 4.5.3
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet22-dotnet-0:2.2.102-1.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet22-0:2.2-2.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet21-dotnet-0:2.1.503-1.el7
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet21-0:2.1-6.el7
View patch

Vendor Advisories (3)

nugetGHSA-6px8-22w5-w334high

Denial of service in ASP.NET Core

May 14, 2022
microsoft2019-Jan/CVE-2019-0564Important

ASP.NET Core Denial of Service Vulnerability

Jan 8, 2019
redhatCVE-2019-0564Moderate

Core: Kestrel - WebSocket DoS via CancellationToken (CoreFX and ASP.NET)

Jan 8, 2019

References

access.redhat.com / errata/RHSA-2019:0040
Third Party Advisory
portal.msrc.microsoft.com / en-US/security-guidance/advisory/CVE-2019-0564
PatchVendor Advisory
securityfocus.com / bid/106413
Third Party AdvisoryVDB Entry