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ALSA-2023:7253 — Moderate: dotnet8.0 security update

Affected: AlmaLinux:9: aspnetcore-runtime-8.0, AlmaLinux:9: aspnetcore-targeting-pack-8.0, AlmaLinux:9: dotnet-apphost-pack-8.0, AlmaLinux:9: dotnet-host, AlmaLinux:9: dotnet-hostfxr-8.0, AlmaLinux:9: dotnet-runtime-8.0, AlmaLinux:9: dotnet-sdk-8.0, AlmaLinux:9: dotnet-sdk-8.0-source-built-artifacts, AlmaLinux:9: dotnet-targeting-pack-8.0, AlmaLinux:9: dotnet-templates-8.0 and 1 more

.NET is a managed-software framework. It implements a subset of the .NET framework APIs and several new APIs, and it includes a CLR implementation.

Security Fix(es):

* dotnet: Arbitrary File Write and Deletion Vulnerability: FormatFtpCommand (CVE-2023-36049) * dotnet: ASP.NET Security Feature Bypass Vulnerability in Blazor forms (CVE-2023-36558)

For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

bdu:2023-08245

BIT-dotnet-2023-36558 — ASP.NET Core Security Feature Bypass Vulnerability

Affected: Bitnami: dotnet

ASP.NET Core Security Feature Bypass Vulnerability

certfr-2023-avi-0945 — De multiples vulnérabilités ont été corrigées dans Microsoft .Net. Elles permettent à un at…

certfr-2023-avi-0945

CLEANSTART-2025-XJ39887 — ASP

Affected: CleanStart: dotnet6-build, CleanStart: dotnet6-runtime

CVE-2023-36558 affects multiple packages. ASP. See references for individual vulnerability details.

EUVD-2026-254525

fkie_cve-2023-36558

ASP.NET Core Security Feature Bypass Vulnerability

GHSA-3fx3-85r4-8j3w — Microsoft Security Advisory CVE-2023-36558: .NET Security Feature Bypass Vulnerability

Affected: NuGet: Microsoft.AspNetCore.Components

# Microsoft Security Advisory CVE-2023-36558: .NET Security Feature Bypass Vulnerability

## <a name="executive-summary"></a>Executive summary

Microsoft is releasing this security advisory to provide information about a vulnerability in ASP.NET Core 6.0, ASP.NET Core 7.0 and, ASP.NET Core 8.0 RC2. This advisory also provides guidance on what developers can do to update their applications to address this vulnerability.

A security feature bypass vulnerability exists in ASP.NET where an unauthenticated user is able to bypass validation on Blazor server forms which could trigger unintended actions.

## Announcement

Announcement for this issue can be found at https://github.com/dotnet/announcements/issues/288

### <a name="mitigation-factors"></a>Mitigation factors

This vulnerability only affects ASP.NET Core Blazor apps. Other application types, including ASP.NET Core apps which do not utilize Blazor, are not affected.

## <a name="affected-software"></a>Affected software

* Any ASP.NET Core Blazor 6.0 application running on .NET 6.0.24 or earlier. * Any ASP.NET Core Blazor 7.0 application running on .NET 7.0.13 or earlier. * Any ASP.NET Core Blazor 8.0 application running on .NET 8.0 RC2.

If your application uses the following package versions, ensure you update to the latest version of .NET.

### <a name=".NET 7"></a>.NET 8.0

Package name | Affected version | Patched version ------------ | ---------------- | ------------------------- [Microsoft.AspNetCore.Components](…

gsd-2023-36558

ICSA-24-165-04 — Siemens ST7 ScadaConnect

An issue was discovered in libxml2 before 2.10.3. When parsing a multi-gigabyte XML document with the XML_PARSE_HUGE parser option enabled, several integer counters can overflow. This results in an attempt to access an array at a negative 2GB offset, typically leading to a segmentation fault. An issue was discovered in libxml2 before 2.10.3. Certain invalid XML entity definitions can corrupt a hash table key, potentially leading to subsequent logic errors. In one case, a double-free can be provoked. A security vulnerability has been identified in all supported versions of OpenSSL related to the verification of X.509 certificate chains that include policy constraints. Attackers may be able to exploit this vulnerability by creating a malicious certificate chain that triggers exponential use of computational resources, leading to a denial-of-service (DoS) attack on affected systems. Policy processing is disabled by default but can be enabled by passing the `-policy` argument to the command line utilities or by calling the `X509_VERIFY_PARAM_set1_policies()` function. Applications that use a non-default option when verifying certificates may be vulnerable to an attack from a malicious CA to circumvent certain checks. Invalid certificate policies in leaf certificates are silently ignored by OpenSSL and other certificate policy checks are skipped for that certificate. A malicious CA could use this to deliberately assert invalid certificate policies in order to circumvent…

msrc_CVE-2023-36558 — ASP.NET Core Security Feature Bypass Vulnerability

msrc_CVE-2023-36558

RHSA-2023:7253 — Red Hat Security Advisory: dotnet8.0 security update

dotnet: Arbitrary File Write and Deletion Vulnerability: FormatFtpCommand dotnet: ASP.NET Security Feature Bypass Vulnerability in Blazor forms

RHSA-2023:7259 — Red Hat Security Advisory: .NET 6.0 security, bug fix, and enhancement update

dotnet: Arbitrary File Write and Deletion Vulnerability: FormatFtpCommand dotnet: ASP.NET Security Feature Bypass Vulnerability in Blazor forms

UBUNTU-CVE-2023-36558

Affected: Ubuntu:22.04:LTS: dotnet6, Ubuntu:22.04:LTS: dotnet7

ASP.NET Core Security Feature Bypass Vulnerability

WID-SEC-W-2023-2895 — Microsoft Entwicklerwerkzeuge: Mehrere Schwachstellen

Ein entfernter Angreifer kann mehrere Schwachstellen in Microsoft .NET Framework, Microsoft ASP.NET, Microsoft Visual Studio und Microsoft Visual Studio Code ausnutzen, um Sicherheitsmechanismen zu umgehen, um seine Privilegien zu erhöhen und um einen Denial of Service Zustand herbeizuführen.