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CVE-2023-38180

70
FAUCET Score

CVE-2023-38180 is a Denial of Service vulnerability impacting Microsoft .NET, ASP.NET Core, and Visual Studio products, including Fedora Project distributions. With a CVSS score of 7.5 (High), this network-exploitable vulnerability requires no user interaction and can lead to a complete denial of service. It is actively exploited in the wild, as confirmed by its presence in CISA's KEV catalog, and has garnered significant community discussion and media coverage, despite a lack of public exploit code.

Impacted Technologies

VendorProductVersion(s)CPE
>= 6.0.0, < 6.0.21CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
>= 7.0.0, < 7.0.10CPE matchmatch criteria
cpe:2.3:a:microsoft:.net:*:*:*:*:*:*:*:*
>= 2.1, < 2.1.40CPE matchmatch criteria
cpe:2.3:a:microsoft:asp.net_core:*:*:*:*:*:*:*:*
>= 17.2.0, < 17.2.18CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*
>= 17.4.0, < 17.4.10CPE matchmatch criteria
cpe:2.3:a:microsoft:visual_studio_2022:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

7.5HIGH

CVSS:3.1/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
3.1

Exploit Intelligence

EPSS Score
14.69%
Probability of exploitation in next 30 days
EPSS Percentile
96.3%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Added to KEV · Aug 9, 2023
This CVE's current EPSS score of 0.1469 is in the 95th 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 (23)

microsoftpatch availablevia nvd_reference
View patch
microsoftpatch availablevia msrc
Product: ASP.NET Core 2.1Fixed in: 2.1.40
View patch
microsoftpatch availablevia msrc
Product: .NET 6.0Fixed in: 6.0.21
View patch
microsoftpatch availablevia msrc
Product: .NET 7.0Fixed in: 7.0.10
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.2Fixed in: 17.2.18
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.4Fixed in: 17.4.10
View patch
microsoftpatch availablevia msrc
Product: Microsoft Visual Studio 2022 version 17.6Fixed in: 17.6.6
View patch
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x86Fixed in: 6.0.21
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.Kestrel.Transport.LibuvFixed in: 2.1.40
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.Kestrel.Transport.SocketsFixed in: 2.1.40
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-arm64Fixed in: 7.0.10
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x64Fixed in: 7.0.10
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x86Fixed in: 7.0.10
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.Server.Kestrel.Transport.LibuvFixed in: 6.0.21
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-arm64Fixed in: 6.0.21
nugetpatch availablevia ghsa
Product: Microsoft.AspNetCore.App.Runtime.win-x64Fixed in: 6.0.21
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9.0 Extended Update SupportFixed in: dotnet6.0-0:6.0.121-1.el9_0
View patch
redhatpatch availablevia redhat_api
Product: .NET Core on Red Hat Enterprise LinuxFixed in: rh-dotnet60-dotnet-0:6.0.121-1.el7_9
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: dotnet7.0-0:7.0.110-1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8Fixed in: dotnet6.0-0:6.0.121-1.el8_8
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 8.6 Extended Update SupportFixed in: dotnet6.0-0:6.0.121-1.el8_6
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: dotnet7.0-0:7.0.110-1.el9_2
View patch
redhatpatch availablevia redhat_api
Product: Red Hat Enterprise Linux 9Fixed in: dotnet6.0-0:6.0.121-1.el9_2
View patch

Vendor Advisories (3)

nugetGHSA-vmch-3w2x-vhgqhigh

.NET Denial of Service Vulnerability

Aug 9, 2023
microsoft2023-Aug/CVE-2023-38180Important

.NET and Visual Studio Denial of Service Vulnerability

Aug 8, 2023
redhatCVE-2023-38180Important

dotnet: Kestrel vulnerability to slow read attacks leading to Denial of Service attack

Aug 8, 2023

References

cisa.gov / known-exploited-vulnerabilities-catalog
US Government Resource
lists.fedoraproject.org / archives/list/[email protected]/message/CL2L4WE5QRT7WEXANYXSKSU43APC5N2V
Mailing List
lists.fedoraproject.org / archives/list/[email protected]/message/NWVZFKTLNMNKPZ755EMRYIA6GHFOWGKY
Mailing List
msrc.microsoft.com / update-guide/vulnerability/CVE-2023-38180
PatchVendor Advisory