PT-2020-20072 · Npm · Json8-Merge-Patch

Published 2020-11-09 · Updated 2021-05-10 · CVE-2020-8268

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions json8-merge-patch versions prior to 1.0.3

Description The issue allows attackers to inject or modify methods and properties of the global object constructor due to a prototype pollution vulnerability in the json8-merge-patch npm package.

Recommendations For versions prior to 1.0.3, update to version 1.0.3 or later to resolve the issue. As a temporary workaround, consider restricting the use of the json8-merge-patch package until a patch is applied.

Exploit

Fix

Prototype Pollution

RCE

Weakness Enumeration

CWE-1321

CWE-471

CWE-20

Related Identifiers

CVE-2020-8268

GHSA-8V9X-9XQG-R8MR

Affected Products

Json8-Merge-Patch

References · 8

• 🔥 https://hackerone.com/reports/980649 · Exploit
• https://osv.dev/vulnerability/CVE-2020-8268 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-8268 · Security Note
• https://osv.dev/vulnerability/GHSA-8v9x-9xqg-r8mr · Vendor Advisory
• https://github.com/sonnyp/JSON8/commit/2e890261b66cbc54ae01d0c79c71b0fd18379e7e#diff-faa7bef039022bc7ca1c613331b2373950ddd3d65ebf25d1699fbdf89773a387 · Note
• https://github.com/sonnyp/JSON8/issues/113 · Note
• https://npmjs.com/package/json8-merge-patch · Note
• https://t.me/cibsecurity/16028 · Telegram Post