Type confusion in mpath

緊急 9.8CVE-2021-23438 · GHSA-p92x-r36w-9395 · 01/09/2021 公開 · 17/06/2026 更新

要点

CVE-2021-23438 は mpath (mpath project), mpath に影響する深刻度「緊急」 (CVSS 9.8) の脆弱性です。
今後30日間に悪用される確率（EPSS）：1.7%（全脆弱性の 77.6% より高い）。
対処：0.8.4 以降に更新してください。

パッケージ	影響を受けるバージョン	修正済みバージョン
mpath mpath_project	`< 0.8.4`	`0.8.4`
mpath npm	`< 0.8.4`	`0.8.4`

概要

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.

NVD の説明

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.