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Improper Restriction of XML External Entity Reference in Apache NiFi

Critical severity GitHub Reviewed Published May 14, 2022 to the GitHub Advisory Database • Updated Sep 12, 2023

Package

maven org.apache.nifi:nifi-standard-processors (Maven)

Affected versions

>= 0.1.0, <= 1.5.0

Patched versions

1.6.0

Description

Apache NiFi External XML Entity issue in SplitXML processor. Malicious XML content could cause information disclosure or remote code execution. The fix to disable external general entity parsing and disallow doctype declarations was applied on the Apache NiFi 1.6.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

References

Published by the National Vulnerability Database May 23, 2018
Published to the GitHub Advisory Database May 14, 2022
Reviewed Jun 29, 2022
Last updated Sep 12, 2023

Severity

Critical

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

EPSS score

0.450%
(76th percentile)

Weaknesses

CVE ID

CVE-2018-1309

GHSA ID

GHSA-42wx-65g4-5cxv

Source code

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