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XML External Entity Reference in Apache NiFi

Moderate severity GitHub Reviewed Published May 17, 2022 to the GitHub Advisory Database • Updated Jan 30, 2023

Package

maven org.apache.nifi:nifi (Maven)

Affected versions

>= 1.0.0, < 1.4.0

Patched versions

1.4.0

Description

An authorized user could upload a template which contained malicious code and accessed sensitive files via an XML External Entity (XXE) attack. The fix to properly handle XML External Entities was applied on the Apache NiFi 1.4.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

References

Published by the National Vulnerability Database Oct 10, 2017
Published to the GitHub Advisory Database May 17, 2022
Reviewed Nov 1, 2022
Last updated Jan 30, 2023

Severity

Moderate

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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
None
Availability
None

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:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

EPSS score

0.047%
(19th percentile)

Weaknesses

CVE ID

CVE-2017-12623

GHSA ID

GHSA-qj7f-j6h9-g5rq

Source code

No known source code
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