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CVE

CVE-2023-38171

Microsoft QUIC Denial of Service Vulnerability

Microsoft QUIC Denial of Service Vulnerability.

HIGH · CVSS 7.5 EPSS 0.08301
Schedule remediation
  • EPSS percentile: top 8% of all CVEs by exploitation likelihood
  • SSVC automatable: yes - attacks can be scripted at scale
  • CVSS base score ≥ 7.0
Sigma rules5 YARA rules0
⬡

Weakness Classification

CWE-476NULL Pointer Dereference
▤

Affected Products & Versions

7
microsoft .net>= 7.0.0 and < 7.0.12
microsoft visual studio 2022>= 17.2.0 and < 17.2.20
microsoft visual studio 2022>= 17.4.0 and < 17.4.12
microsoft visual studio 2022>= 17.6.0 and < 17.6.8
microsoft visual studio 2022>= 17.7.0 and < 17.7.5
microsoft windows 11 22h2< 10.0.22621.2428
microsoft windows server 2022all versions
▤

Affected Packages

2
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.Native.Quic.MsQuic.OpenSSL HIGH fixed in 2.2.3
NuGet Microsoft.Native.Quic.MsQuic.Schannel HIGH fixed in 2.2.3
◈

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 NVD10 Oct 2023 · 06:15 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
none
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

3
siemens-csafSSA-341067
msrcCVE-2023-38171Denial of Service
cisa-csafcisa-csaf-csaf_files-OT-white-2024-icsa-24-165-04
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