Denial of Service (DoS) Affecting rack package, versions <1.4.6 >=1.5.0, <1.5.4 >=1.6.0, <1.6.2


0.0
medium

Snyk CVSS

    Attack Complexity Low

    Threat Intelligence

    EPSS 6.66% (94th percentile)
Expand this section
NVD
5.3 medium
Expand this section
Red Hat
4.3 medium

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  • Snyk ID SNYK-RUBY-RACK-20230
  • published 18 Oct 2016
  • disclosed 15 Jun 2015
  • credit Tomek Rabczak

How to fix?

Upgrade rack to versions 1.4.6, 1.5.4, 1.6.2 or higher.

Overview

rack is a minimal, modular and adaptable interface for developing web applications in Ruby.

Affected versions of this package are vulnerable to Denial of Service attacks by a carefully crafted request leading to a SystemStackError error.

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