CVE-2020-7787
React Adal JWT Token Validation Vulnerability (Code Injection)
Description
This affects all versions of package react-adal. 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.
INFO
Published Date :
Dec. 9, 2020, 5:15 p.m.
Last Modified :
Dec. 11, 2020, 5:01 p.m.
Source :
[email protected]
Remotely Exploitable :
Yes !
Impact Score :
4.2
Exploitability Score :
3.9
References to Advisories, Solutions, and Tools
Here, you will find a curated list of external links that provide in-depth
information, practical solutions, and valuable tools related to
CVE-2020-7787.
| URL | Resource |
|---|---|
| https://github.com/salvoravida/react-adal/pull/115 | Exploit Third Party Advisory |
| https://snyk.io/vuln/SNYK-JS-REACTADAL-1018907 | Exploit Third Party Advisory |
We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).
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The following list is the news that have been mention
CVE-2020-7787 vulnerability anywhere in the article.
The following table lists the changes that have been made to the
CVE-2020-7787 vulnerability over time.
Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.
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CVE Modified by [email protected]
May. 14, 2024
Action Type Old Value New Value -
Initial Analysis by [email protected]
Dec. 11, 2020
Action Type Old Value New Value Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:P/A:N) Changed Reference Type https://github.com/salvoravida/react-adal/pull/115 No Types Assigned https://github.com/salvoravida/react-adal/pull/115 Exploit, Third Party Advisory Changed Reference Type https://snyk.io/vuln/SNYK-JS-REACTADAL-1018907 No Types Assigned https://snyk.io/vuln/SNYK-JS-REACTADAL-1018907 Exploit, Third Party Advisory Added CWE NIST CWE-287 Added CPE Configuration OR *cpe:2.3:a:react-adal_project:react-adal:*:*:*:*:*:node.js:*:*
CWE - Common Weakness Enumeration
While CVE identifies
specific instances of vulnerabilities, CWE categorizes the common flaws or
weaknesses that can lead to vulnerabilities. CVE-2020-7787 is
associated with the following CWEs:
Common Attack Pattern Enumeration and Classification (CAPEC)
Common Attack Pattern Enumeration and Classification
(CAPEC)
stores attack patterns, which are descriptions of the common attributes and
approaches employed by adversaries to exploit the CVE-2020-7787
weaknesses.
Exploit Prediction
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.
0.50 }} 0.08%
score
0.76714
percentile