immerjs/immer · Security
Prototype Pollution in immer
- GHSA ID
- GHSA-33f9-j839-rf8h
- CVE ID
- CVE-2021-23436
- Severity
- critical
- Published
- Updated
- CVSS
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- CVSS v3
- 9.8 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
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.
CWEs
- CWE-843 · Access of Resource Using Incompatible Type ('Type Confusion')
- CWE-1321 · Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')