CVE-2017-11770 — Vulnerability in Microsoft.NETCore.App — CVE Details

HIGH

Improper Certificate Validation

Published April 12, 2022Updated November 8, 2023Source: osv

Summary

.NET Core 1.0, 1.1, and 2.0 allow an unauthenticated attacker to remotely cause a denial of service attack against a .NET Core web application by improperly parsing certificate data. A denial of service vulnerability exists when .NET Core improperly handles parsing certificate data, aka ".NET CORE Denial Of Service Vulnerability".

Advisory Timeline

First published April 12, 2022 (1645 days ago).
Last revised November 8, 2023 — 575 days after initial publication.

Remediation

Upgrade to the fixed version using your package manager.

NuGet

Update Microsoft.NETCore.App to 2.0.3 or later

dotnet add package Microsoft.NETCore.App --version 2.0.3

NuGet

Update System.Security.Cryptography.X509Certificates to 4.1.2 or later

dotnet add package System.Security.Cryptography.X509Certificates --version 4.1.2

After upgrading, run your dependency scanner again to confirm the vulnerability is resolved.

Affected Packages (2)

Affects 1 ecosystem: nuget (2).

Package	Ecosystem	Affected	Fixed In
Microsoft.NETCore.App	nuget	1.0.0, 1.0.1, 1.0.10, 1.0.11 (+29 more)	2.0.3
System.Security.Cryptography.X509Certificates	nuget	4.1.0, 4.1.0-rc2-24027, 4.1.1	4.1.2

Vulnerability Classification

Common Weakness Enumeration (CWE) identifiers for this vulnerability type.

CWE-295
Improper Certificate ValidationMITRE

CVSS Score Breakdown

What the CVSS (Common Vulnerability Scoring System) 7.5 score means for each attack dimension.

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References

Frequently Asked Questions

What is CVE-2017-11770?: Improper Certificate Validation This vulnerability has been assigned a severity rating of HIGH (CVSS score: 7.5/10).
How do I check if my project is affected by CVE-2017-11770?: CVE-2017-11770 affects Microsoft.NETCore.App and System.Security.Cryptography.X509Certificates. Use GeekWala's free vulnerability scanner to check your dependencies against CVE-2017-11770 and 200,000+ other known vulnerabilities.

Severity & Exploitability

CVSS Score

7.5

High exploitability or significant impact. Prioritize remediation within days.

Also Known As

GHSA-7mfr-774f-w5r9

Related CVEs

CVE-2019-0545
HIGH
Exposure of Sensitive Information in System.Net.Http
CVE-2020-1108
HIGH
.NET Core & .NET Framework Denial of Service Vulnerability
CVE-2019-0564
HIGH
Denial of service in ASP.NET Core
CVE-2017-8585
HIGH
Improper Input Validation in Microsoft.NETCore.App
CVE-2020-1147
HIGH
.NET Framework, SharePoint Server, and Visual Studio Remote Code Execution Vulnerability
CVE-2021-1721
MEDIUM
Denial of service in .NET core
CVE-2021-34485
MEDIUM
.NET Core Information Disclosure Vulnerability
CVE-2019-0657
MEDIUM
Improper Input Validation in .Net Framework API's

Check if you're affected

Scan your dependencies to see if this vulnerability affects your projects.

Scan Your Dependencies