PT-2021-15523 · Immer · Immer

Published 2021-09-01 · Updated 2021-09-10 · CVE-2021-23436

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions immer versions prior to 9.0.6

Description A type confusion issue can lead to a bypass when user-provided keys used in the path parameter are arrays. Specifically, this occurs because the condition (p === " proto " || p === "constructor") in the applyPatches function returns false if p is an array containing proto or constructor. This happens due to the === operator returning false when the operands have different types.

Recommendations For versions prior to 9.0.6, update to version 9.0.6 or later to resolve the issue.

Exploit

Fix

Type Confusion

Prototype Pollution

Weakness Enumeration

CWE-843

CWE-1321

Related Identifiers

CVE-2021-23436

GHSA-33F9-J839-RF8H

SNYK-JAVA-ORGWEBJARSNPM-1579266

SNYK-JS-IMMER-1540542

Affected Products

Immer

References · 8

• 🔥 https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579266 · Exploit
• 🔥 https://snyk.io/vuln/SNYK-JS-IMMER-1540542 · Exploit
• https://github.com/immerjs/immer/commit/fa671e55ee9bd42ae08cc239102b665a23958237 · Patch
• https://osv.dev/vulnerability/GHSA-33f9-j839-rf8h · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-23436 · Security Note
• https://osv.dev/vulnerability/CVE-2021-23436 · Vendor Advisory
• https://github.com/immerjs/immer · Note
• https://t.me/cvenotify/20527 · Telegram Post