CVE-2021-23926

Description

A flaw was found when parsing XML files using XMLBeans 2.6.0 or below. The underlying parser created by XMLBeans could be susceptible to XML External Entity (XXE) attacks. The highest threat from this vulnerability is to confidentiality and system availability.

Mitigation

Affected users are advised to update to Apache XMLBeans 3.0.0 or above, which fixes this vulnerability.

Common Vulnerability Scoring System (CVSS) Score Details

Info alert:Important note

CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).

CVSS v3 Score Breakdown

Red HatNVDcve.org
Base Score7.49.1N/A
Attack VectorNetworkNetworkN/A
Attack ComplexityHighLowN/A
Privileges RequiredNoneNoneN/A
User InteractionNoneNoneN/A
ScopeUnchangedUnchangedN/A
ConfidentialityHighHighN/A
Integrity ImpactNoneNoneN/A
Availability ImpactHighHighN/A

Vector

Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:H

NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Red Hat CVSS v3 Score Explanation

Recommended industry best practices would dictate that JVM and applications running in it are executed by a dedicated (non-admin) user with appropriately limited permissions, thereby limiting files and folders able to be exposed by the flaw. We feel this is better reflected by AC:L rather than AC:H, and have adjusted our scoring accordingly.

Understanding the Weakness (CWE)

CWE-776

Availability

Technical Impact: DoS: Resource Consumption (Other)

If parsed, recursive entity references allow the attacker to expand data exponentially, quickly consuming all system resources.

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