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Denial of Service (DoS) Affecting github.com/projectcontour/contour/internal/dag Open this link in a new tab package, versions <1.17.1

0.0
high

  • Attack Complexity

    Low

  • Scope

    Changed

  • Availability

    High

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  • snyk-id

    SNYK-GOLANG-GITHUBCOMPROJECTCONTOURCONTOURINTERNALDAG-1325535

  • published

    25 Jul 2021

  • disclosed

    25 Jul 2021

  • credit

    josh-ferrell

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Introduced: 25 Jul 2021

CVE-2021-32783 Open this link in a new tab
CWE-441 Open this link in a new tab

How to fix?

Upgrade github.com/projectcontour/contour/internal/dag to version 1.17.1 or higher.

Overview

Affected versions of this package are vulnerable to Denial of Service (DoS) via a crafted ExternalName type service that could be used to access Envoy's admin interface.

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