CVEs-PoC/2021/CVE-2021-23436.md

CVE-2021-23436

Description

This affects the package immer before 9.0.6. A type confusion vulnerability can lead to a bypass of CVE-2020-28477 when the user-provided keys used in the path parameter are arrays. In particular, this bypass is possible because the condition (p === "proto" || p === "constructor") in applyPatches_ returns false if p is ['proto'] (or ['constructor']). The === operator (strict equality operator) returns false if the operands have different type.

POC

Reference

• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579266
• https://snyk.io/vuln/SNYK-JAVA-ORGWEBJARSNPM-1579266
• https://snyk.io/vuln/SNYK-JS-IMMER-1540542
• https://snyk.io/vuln/SNYK-JS-IMMER-1540542

Github

• https://github.com/ARPSyndicate/cvemon
• https://github.com/broxus/ever-wallet-browser-extension
• https://github.com/broxus/ever-wallet-browser-extension-old
• https://github.com/dellalibera/dellalibera
• https://github.com/grafana/plugin-validator
• https://github.com/khulnasoft/plugin-validator