Denial of Service (DoS) Affecting microsoft.aspnetcore.server.kestrel.transport.libuv Open this link in a new tab package, versions [,2.0.3) [2.1.0-preview1-final,2.1.0-rc1-final)


0.0
high
  • Attack Complexity

    Low

  • User Interaction

    Required

  • Confidentiality

    High

  • Integrity

    High

  • Availability

    High

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  • snyk-id

    SNYK-DOTNET-MICROSOFTASPNETCORESERVERKESTRELTRANSPORTLIBUV-60243

  • published

    9 May 2018

  • disclosed

    12 Mar 2018

  • credit

    Unknown

Introduced: 12 Mar 2018

CWE-400 Open this link in a new tab

Overview

microsoft.aspnetcore.server.kestrel.transport.libuv is a Libuv transport for the ASP.NET Core Kestrel cross-platform web server.

Affected versions of the package are vulnerable to Denial of Service attacks. A specially crafted request can cause excess resource consumption.

Details

Denial of Service (DoS) describes a family of attacks, all aimed at making a system inaccessible to its intended and legitimate users.

Unlike other vulnerabilities, DoS attacks usually do not aim at breaching security. Rather, they are focused on making websites and services unavailable to genuine users resulting in downtime.

One popular Denial of Service vulnerability is DDoS (a Distributed Denial of Service), an attack that attempts to clog network pipes to the system by generating a large volume of traffic from many machines.

When it comes to open source libraries, DoS vulnerabilities allow attackers to trigger such a crash or crippling of the service by using a flaw either in the application code or from the use of open source libraries.

Two common types of DoS vulnerabilities:

  • High CPU/Memory Consumption- An attacker sending crafted requests that could cause the system to take a disproportionate amount of time to process. For example, commons-fileupload:commons-fileupload.

  • Crash - An attacker sending crafted requests that could cause the system to crash. For Example, npm ws package

Remediation

Upgrade microsoft.aspnetcore.server.kestrel.transport.libuv to version 2.0.3,2.1.0-rc1-final or higher.

References