What is the CVSS score of CVE-2020-1597?

CVE-2020-1597 has a CVSS 3.1 base score of 7.5 (High). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. EPSS exploitation probability: 6.6%.

Is there a patch available for CVE-2020-1597?

Yes, a patch is available for CVE-2020-1597. Update the affected software to the latest version immediately.

Fedora CVE-2020-1597

HIGH

2020-08-17 secure@microsoft.com

Denial Of Service Microsoft Fedora Visual Studio 2017 Visual Studio 2019 Asp Net Core Fedoraproject

7.5

CVSS 3.1 · NVD

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Vulnerability Assessment

Impact	CVSS score of 7.5 (HIGH). Attack characteristics: network attack vector, low complexity, no privileges required, no user interaction not required.
Exploit ScenarioDerived	This vulnerability can be exploited remotely over the network. Successful exploitation could compromise the high-severity affected system.

This Week Schedule remediation this week. Why: HIGH severity (CVSS 7.0-8.9).

Patch available 6.6% exploitation probability (EPSS)

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AnalysisAI

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. Rated high severity (CVSS 7.5), this vulnerability is remotely exploitable, no authentication required, low attack complexity.

RemediationAI

A vendor patch is available. Apply the latest security update as soon as possible. Apply vendor patches when available. Implement network segmentation and monitoring as interim mitigations.

Affected Packages

nuget microsoft.aspnetcore.all fix: 2.1.21

nuget microsoft.aspnetcore.app fix: 2.1.21

nuget microsoft.aspnetcore.app.runtime.linux-arm fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.linux-arm64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.linux-musl-arm64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.linux-musl-x64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.linux-x64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.osx-x64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.win-arm fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.win-arm64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.win-x64 fix: 3.1.7

nuget microsoft.aspnetcore.app.runtime.win-x86 fix: 3.1.7

Source: OSV (Open Source Vulnerabilities)

Affects your stack

Affects 12 packages in nuget

Checking this CVE against your own stacks and servers is part of the Basic plan and up.

Technical ContextAI · show details

A denial of service vulnerability exists when ASP.NET Core improperly handles web requests. An attacker who successfully exploited this vulnerability could cause a denial of service against an ASP.NET Core web application. The vulnerability can be exploited remotely, without authentication. A remote unauthenticated attacker could exploit this vulnerability by issuing specially crafted requests to the ASP.NET Core application. The update addresses the vulnerability by correcting how the ASP.NET Core web application handles web requests. Affected products include: Microsoft Asp.Net Core, Microsoft Visual Studio 2017, Microsoft Visual Studio 2019, Fedoraproject Fedora.

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Exploit and PoC references, threat intelligence from 22 sources

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Severity by source

NVD PRIMARY 7.5 HIGH

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

DescriptionNVD

Threat Intelligence Overview

EPSS Score

6.6%

Top 7% exploitable

Data Quality

2 sources

Confidence: Low

NVD

CVE.org

EPSS

How this decision was reached

The engine reads each signal below and applies a fixed list of rules from top to bottom. The first rule that matches sets the recommended action – like a statement, every line is shown.

SignalValue

Severity HIGH

CISA KEV No

Public POC No

EPSS 6.6%

Patch available Yes

Active threat No

Deciding rule

HIGH severity (CVSS 7.0-8.9)

What every action level means

Emergency Immediate action required. Criteria: CRITICAL + in CISA KEV (actively exploited) without patch, OR CRITICAL + EPSS > 30% without patch, OR CRITICAL + active threat signals without patch.

Act Now Prioritize within 24-48h. Criteria: in KEV with patch available, OR CRITICAL + public POC, OR HIGH + EPSS > 10%, OR CRITICAL + active threat, OR any CRITICAL severity.

This Week Schedule remediation this week. Criteria: HIGH severity (CVSS 7.0-8.9). Patch within normal change window.

This Month Plan within 30 days. Criteria: MEDIUM severity (CVSS 4.0-6.9), lower exploitation probability. Include in regular patch cycle.

Monitor Track and reassess. Criteria: LOW severity (CVSS 0.1-3.9), minimal exploitation risk. No immediate action needed.

SSVC AssessmentENISA

SSVC Decision· derived

Scheduled

Exploitation· derived

None

System Exposure· derived

Open

Automatable· derived

Yes

Human Impact· derived

Medium

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +7

CVSS: +38

PoC: 0

Weaponized: 0

Threat intel: 0

Gov advisory: 0

Attack Technique

Denial of Service MEDIUM

Denial of Service attacks render applications or systems unavailable by overwhelming resources or triggering failure conditions.

Affected Products (CPE)NVD

cpe:2.3:a:microsoft:asp.net_core:2.1:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:asp.net_core:3.1:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:visual_studio_2017:*:*:*:*:*:*:*:*

cpe:2.3:a:microsoft:visual_studio_2019:*:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*

cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*

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References

Advisories & patches

PATCH https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-1597 REF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/WH5FQ5VT3JGHXFXOETHCTBWJUIAPGHHT/ REF https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZW4CBI26KSO3PRL3HLVVISXPPOYUHSXO/

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