CVE-2020-7787 – react-adal

Package

Manager: npm
Name: react-adal
Vulnerable Version: >=0 <0.5.1

Severity

Level: High

CVSS v3.1: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

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

EPSS: 0.00267 pctl0.49928

Details

Improper Authentication in react-adal This affects versions of react-adal < 0.5.1. It is possible for a specially crafted JWT token and request URL can cause the nonce, session and refresh values to be incorrectly validated, causing the application to treat an attacker-generated JWT token as authentic. The logical defect is caused by how the nonce, session and refresh values are stored in the browser local storage or session storage. Each key is automatically appended by ||. When the received nonce and session keys are generated, the list of values is stored in the browser storage, separated by ||, with || always appended to the end of the list. Since || will always be the last 2 characters of the stored values, an empty string ("") will always be in the list of the valid values. Therefore, if an empty session parameter is provided in the callback URL, and a specially-crafted JWT token contains an nonce value of "" (empty string), then adal.js will consider the JWT token as authentic.

Metadata

Created: 2021-04-13T15:22:37Z
Modified: 2021-04-09T19:38:58Z
Source: MANUAL
CWE IDs: ["CWE-287"]
Alternative ID: GHSA-7mpx-vg3c-cmr4
Finding: F039
Auto approve: 1