Denial of Service (DoS) Affecting muhammara package, versions <2.6.0


0.0
high

Snyk CVSS

    Attack Complexity Low
    Availability High

    Threat Intelligence

    EPSS 0.1% (41st percentile)
Expand this section
NVD
7.5 high

Do your applications use this vulnerable package?

In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.

Test your applications
  • Snyk ID SNYK-JS-MUHAMMARA-3091137
  • published 31 Oct 2022
  • disclosed 31 Oct 2022
  • credit Julian Hille

How to fix?

Upgrade muhammara to version 2.6.0 or higher.

Overview

muhammara is a Create, read and modify PDF files and streams. A drop in replacement for hummusjs PDF library

Affected versions of this package are vulnerable to Denial of Service (DoS) when PDFStreamForResponse() is used with invalid data.

PoC

hummus = require('muhammara')
writer = new hummus.PDFStreamForResponse(null)
writer = hummus.createWriter(writer)
writer.end()

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