CVE-2021-3757

Prototype Pollution in immerjs/immer

Severity Score

9.8

*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

*Multiple Sources

Exploited in Wild

*KEV

Decision

*SSVC

Descriptions

immer is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

immer es vulnerable a una Modificación Controlada Inapropiada de Atributos de Prototipos de Objetos ("Contaminación de Prototipos")

A flaw was found in immer when manipulates object attributes such as _proto_, constructor and prototype. An attacker can manipulate these values by overwriting and polluting them. Those attributes would be inherited by JavaScript objects which could trigger exception handlers and leading into a denial of service attack.

*Credits: N/A

CVSS Scores

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

High

Attack Vector

Network

Attack Complexity

Low

Authentication

None

Confidentiality

Partial

Integrity

Partial

Availability

Partial

* Common Vulnerability Scoring System

SSVC

Decision:-

Exploitation

Automatable

Tech. Impact

* Organization's Worst-case Scenario

Timeline

2021-08-31 CVE Reserved
2021-09-02 CVE Published
2024-07-25 EPSS Updated
2024-08-03 CVE Updated
2024-08-03 First Exploit
---------- Exploited in Wild
---------- KEV Due Date

CWE

CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes
CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CAPEC

References (4)

URL	Tag	Source

URL	Date	SRC
https://huntr.dev/bounties/23d38099-71cd-42ed-a77a-71e68094adfa	2024-08-03

URL	Date	SRC
https://github.com/immerjs/immer/commit/fa671e55ee9bd42ae08cc239102b665a23958237	2022-09-10

URL	Date	SRC
https://access.redhat.com/security/cve/CVE-2021-3757	2021-11-29
https://bugzilla.redhat.com/show_bug.cgi?id=2000734	2021-11-29

Affected Vendors, Products, and Versions

Vendor		Product				Version		Other		Status
Vendor	Product	Version	Other	Status	<-- -->	Vendor	Product	Version	Other	Status
Immer Project Search vendor "Immer Project"		Immer Search vendor "Immer Project" for product "Immer"				<= 9.0.5 Search vendor "Immer Project" for product "Immer" and version " <= 9.0.5"		node.js		Affected