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Full vulnerability report · 2023
CVE-2023-36038High confidence

ASP.NET Core Denial of Service Vulnerability

Microsoft · ASP.NET Core 8.0

8.2HighCVSS 3.1
Recommended action
Within 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
Direct vendor intelligence

Authoritative vendor CSAF and VEX advisories

Structured product status and remediation from the issuing vendor. Product-state explanations are always visible; large lists can be searched or downloaded.

1 current
SSA-341067 · CSAF 2.0 · revision 1 · interimSiemens ProductCERTSSA-341067: Multiple vulnerabilities in third-party components in ST7 ScadaConnect before V1.1
1 known affected

The vendor explicitly identifies these products as affected by this CVE.

  • ST7 ScadaConnect (6NH7997-5DA10-0AA0)
Summary
ASP.NET Core Denial of Service Vulnerability
Remediation
Update to V1.1 or later version
Optional official sources

National CERT insights
?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

Select the national-authority views to include. The exact source language is shown on each matched advisory. Your choice is remembered on this device and encoded in the shareable URL.

Official European source

ENISA European Vulnerability Database

Official EUVD identifiers, advisory evidence and known-exploited context. Missing fields are not treated as evidence of low risk.

1 current
ENISA EUVD identifier

EUVD-2023-40022

No EUVD known-exploited evidence

ENISA has published the identifier mapping but no EUVD description has been stored yet.

EUVD state
Present in the current official mapping
Known exploitation
Not present in the current ENISA EUVD known-exploited dataset. This is not proof of no exploitation.
ENISA score
Not supplied in the stored EUVD record
Advisory evidence
No linked advisory details stored yet
Recommended actionWithin 7 days

High technical severity with public exploit material referenced by a structured source; prioritise exposed affected systems while verifying vendor guidance.

Patch available
01

What, why and how

ASP.NET Core Denial of Service Vulnerability

What

ASP.NET Core Denial of Service Vulnerability

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

What

ASP.NET Core Denial of Service Vulnerability

Why

The product does not properly control the allocation and maintenance of a limited resource.

How

An attacker operating through a network path may attempt exploitation without authentication or user interaction. If successful, the issue may disrupt the affected service.

02

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material
?Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.
Reference recorded

CISA Vulnrichment records proof-of-concept exploitation in its SSVC data. BlackTree has not independently executed or validated exploit material.

Likely attack path
a network path → Uncontrolled Resource Consumption → disrupt the affected service
Attack surface
Network
Privileges required
None: unauthenticated exploitation is possible
User interaction
None
Attack complexity
Low: no specialised conditions are recorded
Security boundary
Unchanged: impact remains within the vulnerable component's security authority
Weakness
?CWE means Common Weakness Enumeration: a standard category for the underlying weakness.
CWE-400 ↗

CWE-400: Uncontrolled Resource Consumption. The product does not properly control the allocation and maintenance of a limited resource.

CVSS vector
?CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H/E:U/RL:O/RC:C

Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.

AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UINoneUser interaction: No action by another user is required.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.ILowIntegrity impact: A successful attack can cause a limited loss.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land
No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.
NetworkUnauthenticatedDenial of serviceCWE-400Public exploit reference
A

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

BSI · German · WID-SEC-W-2023-2895Microsoft 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.

Official advisory
CERT-FR · French · CERTFR-2024-AVI-0478Multiples vulnérabilités dans les produits Siemens

ord?id=CVE-2023-33170 Référence CVE CVE-2023-3446 https://www.cve.org/CVERecord?id=CVE-2023-3446 Référence CVE CVE-2023-35390 https://www.cve.org/CVERecord?id=CVE-2023-35390 Référence CVE CVE-2023-35391 https://www.cve.org/CVERecord?id=CVE-2023-35391 Référence CVE CVE-2023-35788 https://www.cve.org/CVERecord?id=CVE-2023-35788 Référence CVE CVE-2023-35823 https://www.cve.org/CVERecord?id=CVE-2023-35823 Référence CVE CVE-2023-35824 https://www.cve.org/CVERecord?id=CVE-2023-35824 Référence CVE CVE-2023-35828 https://www.cve.org/CVERecord?id=CVE-2023-35828 Référence CVE CVE-2023-35829 https://www.cve.org/CVERecord?id=CVE-2023-35829 Référence CVE CVE-2023-36038 https://www.cve.org/CVERecord?id=CVE-2023-36038 Référence CVE CVE-2023-36049 https://www.cve.org/CVERecord?id=CVE-2023-36049 Référence CVE CVE-2023-36435 https://www.cve.org/CVERecord?id=CVE-2023-36435 Référence CVE CVE-2023-36558 https://www.cve.org/CVERecord?id=CVE-2023-36558 Référence CVE CVE-2023-36792 https://www.cve.org/CVERecord?id=CVE-2023-36792 Référence CVE CVE-2023-36793 https://www.cve.org/CVERecord?id=CVE-2023-36793 Référence CVE CVE-2023-36794 https://www.cve.org/CVERecord?id=CVE-2023-36794 Référence CVE CVE-2023-36796 https://www.cve.org/CVERecord?id=CVE-2023-36796 Référence CVE CVE-2023-36799 https://www.cve.org/CVERecord?id=

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0947Multiples vulnérabilités dans les produits Microsoft

mbre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36021 Bulletin de sécurité Microsoft CVE-2023-36030 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36030 Bulletin de sécurité Microsoft CVE-2023-36031 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36031 Bulletin de sécurité Microsoft CVE-2023-36035 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36035 Bulletin de sécurité Microsoft CVE-2023-36037 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36037 Bulletin de sécurité Microsoft CVE-2023-36038 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36038 Bulletin de sécurité Microsoft CVE-2023-36039 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36039 Bulletin de sécurité Microsoft CVE-2023-36041 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36041 Bulletin de sécurité Microsoft CVE-2023-36042 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36042 Bulletin de sécurité Microsoft CVE-2023-36043 du 14 novembre 2023 https://msrc.microsoft.com/update-guide/vulnerability/CVE-2023-36043 Bulletin de sécurité

Official advisory
CERT-FR · French · CERTFR-2023-AVI-0945Multiples vulnérabilités dans Microsoft .Net

De multiples vulnérabilités ont été corrigées dans Microsoft .Net . Elles permettent à un attaquant de provoquer un déni de service, une élévation de privilèges et un contournement de la fonctionnalité de sécurité.

Official advisory
NCSC-NL · Dutch · NCSC-2024-0246Kwetsbaarheden verholpen in Siemens producten

De kwetsbaarheden stellen een kwaadwillende mogelijk in staat aanvallen uit te voeren die kunnen leiden tot de volgende categorieën schade: - Denial-of-Service (DoS) - Manipulatie van gegevens - Omzeilen van beveiligingsmaatregel - (Remote) code execution (Administrator/Root rechten) - (Remote) code execution (Gebruikersrechten) - Toegang tot systeemgegevens - Verhoogde gebruikersrechten De kwaadwillende heeft hiervoor toegang nodig tot de productieomgeving. Het is goed gebruik een dergelijke omgeving niet publiek toegankelijk te hebben.

Official advisory
03

Patch and workaround

Operational remediation based on structured source evidence.

Status
?Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.
Patch available
Affected
ST7 ScadaConnect (6NH7997-5DA10-0AA0)
Fixed
An authoritative update reference is available, but the fixed version is not recorded in the structured CVE fields. Check the linked vendor advisory for the applicable release.
Action
Update to V1.1 or later version
Workaround
No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.
04

Evidence and provenance

Published 14 Nov 2023 · Last source change 9 Oct 2025, 00:00 UTC · CWE-400 · Uncontrolled Resource Consumption

CVE recordCVE.org · 5.1
CVSS sourceCNA
EPSS source
?The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.
FIRST · tracked since 2026-08-14
European sourceENISA EUVD · EUVD-2023-40022
Product sourceVendor CSAF · Siemens ProductCERT
Remediation sourceVendor CSAF · Siemens ProductCERT
CWE sourceOther authority
NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates →

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

Material fields only · duplicate refreshes suppressed · history retained for the configured operational retention period
CVE published
Fixed release or patch reference recorded
ENISA EUVD · EUVD-2023-40022↗Vendor CSAF · Siemens ProductCERT↗CISA Vulnrichment SSVC evidence↗CVE authority or vendor reference↗Official CVE record (CNA and ADP data)↗NVD record↗
Technical terms and abbreviations used in this report
CVE
Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS
Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS
Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE
Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA
CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP
Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD
National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT
A computer security incident response team that publishes warnings or coordinates incident response.
PoC
Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF
Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL
Living off the land: abuse of legitimate tools or system functions during an attack.
Free version - for non-commercial use only.CVE-2023-36038 · cve.blacktree.nl