GitHub Advisoryadvisory · npm

GHSA-p92x-r36w-9395 Type confusion in mpath

MEDIUM Published 2021-09-02 Modified 2023-09-07 Official page ↗
Aliases
CVE-2021-23438
Ecosystem
npm
Packages
mpath
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L
Weaknesses
CWE-843
Reviewed
2021-09-02

Affected packages

• npm mpath: < 0.8.4 → fixed in 0.8.4

Description

This affects the package mpath before 0.8.4. A type confusion vulnerability can lead to a bypass of CVE-2018-16490. In particular, the condition `ignoreProperties.indexOf(parts[i]) !== -1` returns `-1` if `parts[i]` is `['__proto__']`. This is because the method that has been called if the input is an array is `Array.prototype.indexOf()` and not `String.prototype.indexOf()`. They behave differently depending on the type of the input.

Related

Alias · CVE (1)

  • CVE-2021-23438 This affects the package mpath before 0.8.4. vulnerability

Weakness · CWE (1)

  • CWE-843 Access of Resource Using Incompatible Type weakness

References