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Missing Authentication for Critical Function in Apache NiFi

High severity GitHub Reviewed Published Jan 6, 2022 to the GitHub Advisory Database • Updated Feb 1, 2023

Package

maven org.apache.nifi:nifi (Maven)

Affected versions

>= 1.0.0, <= 1.11.4

Patched versions

1.12.0-RC1

Description

In Apache NiFi 1.0.0 to 1.11.4, the NiFi download token (one-time password) mechanism used a fixed cache size and did not authenticate a request to create a download token, only when attempting to use the token to access the content. An unauthenticated user could repeatedly request download tokens, preventing legitimate users from requesting download tokens.

References

Published by the National Vulnerability Database Oct 1, 2020
Reviewed Mar 29, 2021
Published to the GitHub Advisory Database Jan 6, 2022
Last updated Feb 1, 2023

Severity

High

CVSS overall score

This score calculates overall vulnerability severity from 0 to 10 and is based on the Common Vulnerability Scoring System (CVSS).
/ 10

CVSS v3 base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS v3 base metrics

Attack vector: More severe the more the remote (logically and physically) an attacker can be in order to exploit the vulnerability.
Attack complexity: More severe for the least complex attacks.
Privileges required: More severe if no privileges are required.
User interaction: More severe when no user interaction is required.
Scope: More severe when a scope change occurs, e.g. one vulnerable component impacts resources in components beyond its security scope.
Confidentiality: More severe when loss of data confidentiality is highest, measuring the level of data access available to an unauthorized user.
Integrity: More severe when loss of data integrity is the highest, measuring the consequence of data modification possible by an unauthorized user.
Availability: More severe when the loss of impacted component availability is highest.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS score

0.126%
(49th percentile)

Weaknesses

CVE ID

CVE-2020-9487

GHSA ID

GHSA-3pp3-77j6-8ph6

Source code

No known source code
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