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CVE

CVE-2023-38180

Microsoft .NET Core and Visual Studio Denial-of-Service Vulnerability

.NET and Visual Studio Denial of Service Vulnerability.

HIGH · CVSS 7.5 ⚠ CISA KEV EPSS 0.00882
Act now
  • Listed on CISA KEV (known exploited in the wild)
  • SSVC exploitation status: active
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules5 YARA rules0
⬢

Required Remediation

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

⬡

Weakness Classification

CWE-400Uncontrolled Resource Consumption
▤

Affected Products & Versions

7
microsoft .net>= 6.0.0 and < 6.0.21
microsoft .net>= 7.0.0 and < 7.0.10
microsoft asp.net core>= 2.1 and < 2.1.40
microsoft visual studio 2022>= 17.2.0 and < 17.2.18
microsoft visual studio 2022>= 17.4.0 and < 17.4.10
microsoft visual studio 2022>= 17.6.0 and < 17.6.6
fedoraproject fedoraall versions
▤

Affected Packages

5
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.AspNetCore.App.Runtime.win-arm64 HIGH fixed in 7.0.10
NuGet Microsoft.AspNetCore.App.Runtime.win-x64 HIGH fixed in 7.0.10
NuGet Microsoft.AspNetCore.App.Runtime.win-x86 HIGH fixed in 7.0.10
NuGet Microsoft.AspNetCore.Server.Kestrel.Transport.Libuv HIGH fixed in 6.0.21
NuGet Microsoft.AspNetCore.Server.Kestrel.Transport.Sockets HIGH fixed in 2.1.40
◈

Sigma Hunt Rules

5
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.
producthighUAC Bypass Using .NET Code Profiler on MMC
producthighPotential AMSI Bypass Via .NET Reflection
producthighETW Logging Tamper In .NET Processes Via CommandLine
producthighETW Logging Disabled In .NET Processes - Registry
producthighETW Logging Disabled In .NET Processes - Sysmon Registry
▣

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 NVD08 Aug 2023 · 07:15 PM
CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC triage · cisa-vulnrichment
Exploitation
active
Automatable
yes
Technical impact
partial
SSVC asks the questions that actually drive patch urgency: is it being exploited, can attacks be automated, and how total is the impact.
⚑

Vendor Advisories

13
siemens-csafSSA-341067
rhsaRHSA-2023:4645Important
rhsaRHSA-2023:4642Important
rhsaRHSA-2023:4641Important
rhsaRHSA-2023:4644Important
🔗

References & Sources

3
Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CL2L4WE5QRT7WEXANYXSKSU43APC5N2V/Mailing List
https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/NWVZFKTLNMNKPZ755EMRYIA6GHFOWGKY/Mailing List
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-38180US Government Resource
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