GHSA-m9hw-7xfv-wqg7 – json-logic-js

Package

Manager: npm
Name: json-logic-js
Vulnerable Version: >=0 <2.0.0

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N/E:P/RL:O/RC:R

CVSS v4.0: CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N

EPSS: N/A pctlN/A

Details

Prototype Pollution in json-logic-js Versions of json-logic-js prior to 2.0.0 are vulnerable to Prototype Pollution. The method operation allows a malicious user to modify the prototype of Object through the method property name. This causes modification of any existing property that will exist on all objects and leads to Remote Code Execution. The following rule creates a popup when run from a browser: ``` { "method": [ { "method": [ { "var": "__proto__.constructor.is.__proto__" }, "constructor", [ "var x = 'SECURITY!'; console.log(x, window.fetch); alert(x)" ] ] }, "call" ] } ```

Metadata

Created: 2020-11-12T19:36:14Z
Modified: 2020-11-12T19:35:53Z
Source: https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2020/11/GHSA-m9hw-7xfv-wqg7/GHSA-m9hw-7xfv-wqg7.json
CWE IDs: ["CWE-471"]
Alternative ID: N/A
Finding: F138
Auto approve: 1