Denial of Service (DoS) Affecting json package, versions <1.1.0



CVSS assessment made by Snyk's Security Team

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  • Snyk ID SNYK-RUBY-JSON-20000
  • published 20 May 2007
  • disclosed 20 May 2007
  • credit Unknown

Introduced: 20 May 2007

CVE NOT AVAILABLE CWE-400 Open this link in a new tab


The json gem is a JSON implementation as a Ruby extension in C. Affected versions of this Gem contain an overflow condition. This is triggered when user-supplied input is not properly validated while handling specially crafted data. This can allow a remote attacker to cause a stack-based buffer overflow, resulting in a denial of service, or potentially allowing the execution of arbitrary code.


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

CVSS Scores

version 3.1
Expand this section


7.5 high
  • Attack Vector (AV)
  • Attack Complexity (AC)
  • Privileges Required (PR)
  • User Interaction (UI)
  • Scope (S)
  • Confidentiality (C)
  • Integrity (I)
  • Availability (A)