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Improper Restriction of XML External Entity Reference in com.h2database:h2.

High severity GitHub Reviewed Published Dec 16, 2021 to the GitHub Advisory Database • Updated Aug 18, 2023

Package

maven com.h2database:h2 (Maven)

Affected versions

>= 1.4.198, < 2.0.202

Patched versions

2.0.202

Description

H2 is an embeddable RDBMS written in Java. The package com.h2database:h2 from 1.4.198 and before 2.0.202 are vulnerable to XML External Entity (XXE) Injection via the org.h2.jdbc.JdbcSQLXML class object, when it receives parsed string data from org.h2.jdbc.JdbcResultSet.getSQLXML() method. If it executes the getSource() method when the parameter is DOMSource.class it will trigger the vulnerability.

References

Published by the National Vulnerability Database Dec 10, 2021
Reviewed Dec 14, 2021
Published to the GitHub Advisory Database Dec 16, 2021
Last updated Aug 18, 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
Low
User interaction
None
Scope
Unchanged
Confidentiality
High
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:L/UI:N/S:U/C:H/I:N/A:H

EPSS score

1.036%
(85th percentile)

Weaknesses

CVE ID

CVE-2021-23463

GHSA ID

GHSA-7rpj-hg47-cx62

Source code

Credits

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