Denial of Service (DoS) Affecting github.com/antchfx/xmlquery Open this link in a new tab package, versions <1.3.1


0.0
high
  • Exploit Maturity

    Proof of concept

  • Attack Complexity

    Low

  • Availability

    High

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  • snyk-id

    SNYK-GOLANG-GITHUBCOMANTCHFXXMLQUERY-608944

  • published

    14 Sep 2020

  • disclosed

    30 Aug 2020

  • credit

    dwisiswant0

Introduced: 30 Aug 2020

CWE-400 Open this link in a new tab

How to fix?

Upgrade github.com/antchfx/xmlquery to version 1.3.1 or higher.

Overview

github.com/antchfx/xmlquery is a package to extract data from XML documents using XPath expression.

Affected versions of this package are vulnerable to Denial of Service (DoS) via xmlquery.(*Node).InnerText. The LoadURL function allows all response types/formats to be parsed (other than XML), so that it can proceed to the next process without validation.

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