Denial of Service (DoS)

Affecting github.com/tidwall/gjson package, versions <1.6.6

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Overview

github.com/tidwall/gjson is a provides a way to get values from a json document.

Affected versions of this package are vulnerable to Denial of Service (DoS). An Out-of-Bounds runtime panic can be triggered through JSON array characters such as [] or {}.

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

Remediation

Upgrade github.com/tidwall/gjson to version 1.6.6 or higher.

References

CVSS Score

4.8
medium severity
  • Attack Vector
    Network
  • Attack Complexity
    High
  • Privileges Required
    None
  • User Interaction
    None
  • Scope
    Unchanged
  • Confidentiality
    None
  • Integrity
    Low
  • Availability
    Low
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:L/E:P/RL:O/RC:C
Credit
abergmann
CVE
CVE-2020-36067
CWE
CWE-400
Snyk ID
SNYK-GOLANG-GITHUBCOMTIDWALLGJSON-1056415
Disclosed
07 Jan, 2021
Published
07 Jan, 2021