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Fencer Vulns
high 7.5

CVE-2023-38180 kev in the critical feed json

.NET and Visual Studio Denial of Service Vulnerability

published 2023-08-08 3 y ago modified 2026-09-08 2 mo ago also BIT-aspnet-core-2023-38180 , BIT-dotnet-2023-38180 , BIT-dotnet-sdk-2023-38180 , EUVD-2023-2363 , GHSA-vmch-3w2x-vhgq

cvss
7.5
version 3.1, CNA
cisa kev
Exploited
added 2023-08-09
epss
14.1%
EPSS 14.1% chance of exploitation in 30 days, percentile 96%
public exploits
0
none known

Summary

.NET and Visual Studio Denial of Service Vulnerability

Patch / fix

cisa required action Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

  • nuget Microsoft.AspNetCore.App.Runtime.win-arm64 6.0.21, 7.0.10
  • nuget Microsoft.AspNetCore.App.Runtime.win-x64 6.0.21, 7.0.10
  • nuget Microsoft.AspNetCore.App.Runtime.win-x86 6.0.21, 7.0.10
  • nuget Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv 2.1.40, 6.0.21
  • nuget Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets 2.1.40
  • bitnami aspnet-core 2.1.40
  • bitnami dotnet 6.0.21, 7.0.10
  • bitnami dotnet-sdk 6.0.21, 7.0.10
  • Microsoft .NET 6.0 6.0.21
  • Microsoft .NET 7.0 7.0.10
  • Microsoft ASP.NET Core 2.1 2.1.40
  • Microsoft Microsoft Visual Studio 2022 version 17.2 17.2.18
  • Microsoft Microsoft Visual Studio 2022 version 17.4 17.4.10
  • Microsoft Microsoft Visual Studio 2022 version 17.6 17.6.6
  • dotnet6 Ubuntu 22.04 LTS 6.0.121-0ubuntu1~22.04.1
  • dotnet7 Ubuntu 22.04 LTS 7.0.110-0ubuntu1~22.04.1

ubuntu advisories UBUNTU-CVE-2023-38180

Ubuntu security data © Canonical Ltd., from https://github.com/canonical/ubuntu-security-notices via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

  • dotnet6.0 RHEL 8 6.0.121-1.el8_8
  • dotnet-sdk-6.0 RHEL 8 6.0.121-1.el8_8
  • dotnet-hostfxr-6.0 RHEL 8 6.0.21-1.el8_8
  • dotnet-runtime-6.0 RHEL 8 6.0.21-1.el8_8
  • dotnet-templates-6.0 RHEL 8 6.0.121-1.el8_8
  • aspnetcore-runtime-6.0 RHEL 8 6.0.21-1.el8_8
  • dotnet-apphost-pack-6.0 RHEL 8 6.0.21-1.el8_8
  • dotnet-targeting-pack-6.0 RHEL 8 6.0.21-1.el8_8

red hat advisories RHSA-2023:4640RHSA-2023:4645RHSA-2023:4643RHSA-2023:4639RHSA-2023:4642RHSA-2023:4644

  • dotnet-host AlmaLinux 9 7.0.10-1.el9_2
  • dotnet-sdk-7.0 AlmaLinux 9 7.0.110-1.el9_2
  • dotnet-hostfxr-7.0 AlmaLinux 9 7.0.10-1.el9_2
  • dotnet-runtime-7.0 AlmaLinux 9 7.0.10-1.el9_2
  • dotnet-templates-7.0 AlmaLinux 9 7.0.110-1.el9_2
  • aspnetcore-runtime-7.0 AlmaLinux 9 7.0.10-1.el9_2
  • dotnet-apphost-pack-7.0 AlmaLinux 9 7.0.10-1.el9_2
  • dotnet-targeting-pack-7.0 AlmaLinux 9 7.0.10-1.el9_2

almalinux advisories ALSA-2023:4642ALSA-2023:4643ALSA-2023:4644ALSA-2023:4645

  • dotnet7.0 Rocky Linux 8 7.0.110-1.el8_8
  • dotnet6.0 Rocky Linux 8 6.0.121-1.el8_8

rocky linux advisories RLSA-2023:4643RLSA-2023:4645

  • dotnet6-build Alpine 3.20, Alpine 3.19, Alpine 3.18 6.0.121-r0
  • dotnet7-build Alpine 3.19, Alpine 3.18 7.0.110-r0
  • dotnet6-runtime Alpine 3.20, Alpine 3.19, Alpine 3.18 6.0.21-r0
  • dotnet7-runtime Alpine 3.19, Alpine 3.18 7.0.10-r0

alpine advisories ALPINE-CVE-2023-38180

Alpine secdb © Alpine Linux, from https://secdb.alpinelinux.org via OSV; changed: normalised to fixed package versions per release. CC BY-SA 4.0

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-2023-38180 updated cvss 7.5

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

  • Red Hat .NET Core on Red Hat Enterprise Linux ComputeNode (v. 7) rh-dotnet60-dotnet 6.0.121-1.el7_9, rh-dotnet60-dotnet-host 6.0.21-1.el7_9, rh-dotnet60-dotnet-sdk-6.0 6.0.121-1.el7_9, rh-dotnet60-dotnet-hostfxr-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-runtime-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-templates-6.0 6.0.121-1.el7_9, +6 more Red Hat .NET Core on Red Hat Enterprise Linux Server (v. 7) rh-dotnet60-dotnet 6.0.121-1.el7_9, rh-dotnet60-dotnet-host 6.0.21-1.el7_9, rh-dotnet60-dotnet-sdk-6.0 6.0.121-1.el7_9, rh-dotnet60-dotnet-hostfxr-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-runtime-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-templates-6.0 6.0.121-1.el7_9, +6 more Red Hat .NET Core on Red Hat Enterprise Linux Workstation (v. 7) rh-dotnet60-dotnet 6.0.121-1.el7_9, rh-dotnet60-dotnet-host 6.0.21-1.el7_9, rh-dotnet60-dotnet-sdk-6.0 6.0.121-1.el7_9, rh-dotnet60-dotnet-hostfxr-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-runtime-6.0 6.0.21-1.el7_9, rh-dotnet60-dotnet-templates-6.0 6.0.121-1.el7_9, +6 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4641
  • Red Hat CodeReady Linux Builder EUS (v.8.6) dotnet 6.0.121-1.el8_6, dotnet6.0 6.0.121-1.el8_6, dotnet-host 6.0.21-1.el8_6, dotnet-sdk-6.0 6.0.121-1.el8_6, dotnet-hostfxr-6.0 6.0.21-1.el8_6, dotnet-runtime-6.0 6.0.21-1.el8_6, +7 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4640
  • Red Hat CodeReady Linux Builder EUS (v.9.0) dotnet6.0 6.0.121-1.el9_0, dotnet-host 6.0.21-1.el9_0, dotnet-sdk-6.0 6.0.121-1.el9_0, dotnet-hostfxr-6.0 6.0.21-1.el9_0, dotnet-runtime-6.0 6.0.21-1.el9_0, dotnet-templates-6.0 6.0.121-1.el9_0, +6 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4639
  • Red Hat Enterprise Linux AppStream (v. 8) dotnet 7.0.110-1.el8_8, dotnet6.0 6.0.121-1.el8_8, dotnet7.0 7.0.110-1.el8_8, dotnet-host 7.0.10-1.el8_8, dotnet-sdk-6.0 6.0.121-1.el8_8, dotnet-sdk-7.0 7.0.110-1.el8_8, +17 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4645
  • Red Hat Enterprise Linux AppStream (v. 9) dotnet6.0 6.0.121-1.el9_2, dotnet7.0 7.0.110-1.el9_2, dotnet-host 7.0.10-1.el9_2, dotnet-sdk-6.0 6.0.121-1.el9_2, dotnet-sdk-7.0 7.0.110-1.el9_2, dotnet-hostfxr-6.0 6.0.21-1.el9_2, +16 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4644
  • Red Hat Enterprise Linux AppStream EUS (v.8.6) dotnet 6.0.121-1.el8_6, dotnet6.0 6.0.121-1.el8_6, dotnet-host 6.0.21-1.el8_6, dotnet-sdk-6.0 6.0.121-1.el8_6, dotnet-hostfxr-6.0 6.0.21-1.el8_6, dotnet-runtime-6.0 6.0.21-1.el8_6, +7 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4640
  • Red Hat Enterprise Linux AppStream EUS (v.9.0) dotnet6.0 6.0.121-1.el9_0, dotnet-host 6.0.21-1.el9_0, dotnet-sdk-6.0 6.0.121-1.el9_0, dotnet-hostfxr-6.0 6.0.21-1.el9_0, dotnet-runtime-6.0 6.0.21-1.el9_0, dotnet-templates-6.0 6.0.121-1.el9_0, +6 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4639
  • Red Hat Enterprise Linux CRB (v. 8) dotnet 7.0.110-1.el8_8, dotnet6.0 6.0.121-1.el8_8, dotnet7.0 7.0.110-1.el8_8, dotnet-host 7.0.10-1.el8_8, dotnet-sdk-6.0 6.0.121-1.el8_8, dotnet-sdk-7.0 7.0.110-1.el8_8, +17 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4645
show 1 more
  • Red Hat Enterprise Linux CRB (v. 9) dotnet6.0 6.0.121-1.el9_2, dotnet7.0 7.0.110-1.el9_2, dotnet-host 7.0.10-1.el9_2, dotnet-sdk-6.0 6.0.121-1.el9_2, dotnet-sdk-7.0 7.0.110-1.el9_2, dotnet-hostfxr-6.0 6.0.21-1.el9_2, +16 more
    fixed: vendor fix “If your application is running behind a reverse proxy, or Web Application Firewall, which has its own mitigations against HTTP based attacks this issue may be mitigated by the proxy or WAF.” RHSA-2023:4644

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

cisa ICSA-24-165-04 updated cvss 7.5

Siemens ST7 ScadaConnect

Facts from CISA's republication of the vendor's own advisory (CSAF); the linked advisory is the authoritative source. CISA notification · csaf

Timeline

  1. Published
  2. Added to CISA KEV
  3. CISA patch deadline
  4. CISA SSVC: exploitation active

Known exploited

Added
3 y ago
Patch by
2023-08-30 (3 y ago)
Ransomware
Not known
Required action
Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.
Vendor, product
Microsoft, .NET Core and Visual Studio
CISA name
Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability

CISA SSVC

Exploitation
Active, exploited in the wild
Automatable
yes
Technical impact
partial
Assessed
2 y ago

Exploit prediction

14.13% chance of exploitation in the next 30 days, higher than 96% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:P/RL:O/RC:C
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:H
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
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.AspNetCore.App.Runtime.win-arm64
>=7.0.0, <7.0.10
>=6.0.0, <6.0.21
7.0.10
6.0.21
nuget Microsoft.AspNetCore.App.Runtime.win-x64
>=7.0.0, <7.0.10
>=6.0.0, <6.0.21
7.0.10
6.0.21
nuget Microsoft.AspNetCore.App.Runtime.win-x86
>=7.0.0, <7.0.10
>=6.0.0, <6.0.21
7.0.10
6.0.21
nuget Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv
>=6.0.0, <6.0.21
<2.1.40
6.0.21
2.1.40
nuget Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets
<2.1.40
2.1.40
bitnami aspnet-core
>=2.1.0, <2.1.40
2.1.40
bitnami dotnet
>=6.0.0, <6.0.21
>=7.0.0, <7.0.10
6.0.21
7.0.10
bitnami dotnet-sdk
>=6.0.0, <6.0.21
>=7.0.0, <7.0.10
6.0.21
7.0.10

Affected products

  • Microsoft .NET 6.0
  • Microsoft .NET 7.0
  • Microsoft ASP.NET Core 2.1
  • Microsoft Microsoft Visual Studio 2022 version 17.2
  • Microsoft Microsoft Visual Studio 2022 version 17.4
  • Microsoft Microsoft Visual Studio 2022 version 17.6

Classification

Weakness
  • CWE-400 Uncontrolled Resource Consumption

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.