CVE-2023-38171

Microsoft QUIC Denial of Service Vulnerability

CVE-2023-38171 is fixed in 9 products on 2 platforms, first by PowerShell Preview 7.4.0.1, released December 20, 2022. It is not reported as exploited, but the vendor rates exploitation more likely. Patch Radar priority: Urgent.

UrgentFixed on 2 platforms

CVSS

7.5

Important

Exploitation

More likely

Vendor assessment

CISA KEV

Not listed

Not in the Known Exploited Vulnerabilities catalog

EPSS

0.7105

99th percentile

Microsoft QUIC Denial of Service Vulnerability

Where it's fixed

Product	Fixed in	Fix	Released
Microsoft
.NET 7.0		KB5032875	Dec 12, 2023
Windows 11 Version 22H2 for ARM64-based Systems	22621.2428	KB5031354	Oct 10, 2023
Windows 11 Version 22H2 for x64-based Systems	22621.2428	KB5031354	Oct 10, 2023
Windows 11 version 21H2 for ARM64-based Systems	22000.2538	KB5031358	Oct 10, 2023
Windows 11 version 21H2 for x64-based Systems	22000.2538	KB5031358	Oct 10, 2023
Windows Server 2022	20348.2031	KB5031364	Oct 10, 2023
Windows Server 2022 (Server Core installation)	20348.2031	KB5031364	Oct 10, 2023
Windows apps
PowerShell	7.3.9.0	PowerShell 7.3.9.0	Oct 26, 2023
PowerShell Preview	7.4.0.1	PowerShell Preview 7.4.0.1	Dec 20, 2022

Details

Published
October 10, 2023
Weakness
NULL Pointer Dereference
Vendor advisory
https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-38171

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