PT-2023-9612 · Microsoft+7 · .Net Framework+7

Johan Gorter · Published 2023-01-10 · Updated 2025-09-04 · CVE-2023-21538

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions Microsoft .NET (affected versions not specified)

Description The issue is related to flaws in the deserialization mechanism of the Microsoft .NET platform. It allows a remote attacker to cause a denial of service.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

Deserialization of Untrusted Data

Weakness Enumeration

CWE-502

Related Identifiers

ALSA-2023:0077

ALSA-2023:0079

ALT-PU-2023-1425

ALT-PU-2023-1426

ALT-PU-2023-4594

ALT-PU-2023-4595

ALT-PU-2024-16792

ALT-PU-2024-16794

BDU:2024-08772

BIT-DOTNET-2023-21538

BIT-DOTNET-SDK-2023-21538

BIT-POWERSHELL-2023-21538

CESA-2023_0079

CVE-2023-21538

GHSA-8F7F-VQG5-JRV9

RHSA-2023:0077

RHSA-2023:0078

RHSA-2023:0079

RHSA-2023_0077

RHSA-2023_0079

RLSA-2023:0077

RLSA-2023:0079

USN-5798-1

Affected Products

Alt Linux

Almalinux

Centos

Linuxmint

.Net Framework

Red Hat

Rocky Linux

Ubuntu

References · 41

• https://linux.oracle.com/errata/ELSA-2023-0079.html · Vendor Advisory
• https://osv.dev/vulnerability/BIT-powershell-2023-21538 · Vendor Advisory
• https://linux.oracle.com/errata/ELSA-2023-0077.html · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2023-21538 · Security Note
• https://osv.dev/vulnerability/UBUNTU-CVE-2023-21538 · Vendor Advisory
• https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-21538 · Vendor Advisory
• https://errata.almalinux.org/9/ALSA-2023-0077.html · Vendor Advisory
• https://osv.dev/vulnerability/ALSA-2023:0077 · Vendor Advisory
• https://errata.almalinux.org/8/ALSA-2023-0079.html · Vendor Advisory
• https://osv.dev/vulnerability/USN-5798-1 · Vendor Advisory
• https://errata.rockylinux.org/RLSA-2023:0079 · Vendor Advisory
• https://osv.dev/vulnerability/RLSA-2023:0077 · Vendor Advisory
• https://lists.fedoraproject.org/archives/list/[e-mail]/message/ZI27LYW5C4Z4644WYIQWOXBZL7WIP2X6 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-dotnet-2023-21538 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-8f7f-vqg5-jrv9 · Vendor Advisory