Auth bypass in Microsoft Azure Functions

CVE-2020-16904

<p>An elevation of privilege vulnerability exists in the way Azure Functions validate access keys.</p> <p>An unauthenticated attacker who successfully exploited this vulnerability could invoke an HTTP Function without proper authorization.</p> <p>This security update addresses the vulnerability by correctly validating access keys used to access HTTP Functions.</p>

Vulnerability class: Broken Access Control

EPSS: 0.034 (87.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

Affected products

Weakness classification (CWE)

References

Frequently asked questions

What is CVE-2020-16904?
CVE-2020-16904 is a medium-severity vulnerability in Microsoft Azure Functions, classified under Incorrect Authorization. CVSS score: 5.3/10. Published 2020-10-16.
How severe is CVE-2020-16904?
Medium severity. CVSS v3 base score is 5.3 out of 10.