External resource access via unrestricted XML entities
Published Dec 29, 2022 · Updated Aug 3, 2024
XML external entity injection in ONC Code Validator API 1.0.30 and earlier allows attackers to access external resources via crafted XML. The documentBuilder bean creates a DocumentBuilderFactory without disabling DOCTYPE declarations, external entities, external DTD loading, or XInclude. Published assessments conflict on the access gate, and the repository does not document whether resolved entity content is returned, bounding the established impact to parser-initiated resource access.
Summary
What happened
XML external entity injection in ONC Code Validator API 1.0.30 and earlier allows attackers to access external resources via crafted XML. The documentBuilder bean creates a DocumentBuilderFactory without disabling DOCTYPE declarations, external entities, external DTD loading, or XInclude. Published assessments conflict on the access gate, and the repository does not document whether resolved entity content is returned, bounding the established impact to parser-initiated resource access.
The record
- CVE
- CVE-2021-4295
- Published
- Dec 29, 2022
- Updated
- Aug 3, 2024
- Vendor
- Office of the National Coordinator for Health Information Technology
- Product
- Code Validator API
- Classifications
- CWE-611, CAPEC-221
- Attack vector
- Unavailable
- Privileges
- Unavailable
Timeline
How it unfolded
- Dec 29, 2022CVE publishedPublication date reported by the CVE source.
- Aug 3, 2024Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=1.0.0
- Affected versionversion=1.0.1
- Affected versionversion=1.0.10
- Affected versionversion=1.0.11
- Affected versionversion=1.0.12
- Affected versionversion=1.0.13
- Affected versionversion=1.0.14
- Affected versionversion=1.0.15
- Affected versionversion=1.0.16
- Affected versionversion=1.0.17
- Affected versionversion=1.0.18
- Affected versionversion=1.0.19
- Affected versionversion=1.0.2
- Affected versionversion=1.0.20
- Affected versionversion=1.0.21
- Affected versionversion=1.0.22
- Affected versionversion=1.0.23
- Affected versionversion=1.0.24
- Affected versionversion=1.0.25
- Affected versionversion=1.0.26
- Affected versionversion=1.0.27
- Affected versionversion=1.0.28
- Affected versionversion=1.0.29
- Affected versionversion=1.0.3
- Affected versionversion=1.0.30
- Affected versionversion=1.0.4
- Affected versionversion=1.0.5
- Affected versionversion=1.0.6
- Affected versionversion=1.0.7
- Affected versionversion=1.0.8
- Affected versionversion=1.0.9
What conditions does exploitation require?
What is affected?
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
No public exploit references are available in this record.
Labels summarize the accepted research assessment. They do not indicate a test against your environment.
Technologies
Your stack
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Your stack
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