File disclosure via external XML entity resolution
Published Oct 19, 2021 · Updated Aug 3, 2024
XXE injection in Stanford CoreNLP 4.3.0 and earlier allows remote attackers to read server-accessible files through crafted XML. The XMLUtils parsers create default DocumentBuilderFactory instances that accept document types and resolve external general and parameter entities. Exploitation requires attacker-controlled XML to reach an affected parser; disclosure is limited to resources readable or reachable by the CoreNLP process.
Summary
What happened
XXE injection in Stanford CoreNLP 4.3.0 and earlier allows remote attackers to read server-accessible files through crafted XML. The XMLUtils parsers create default DocumentBuilderFactory instances that accept document types and resolve external general and parameter entities. Exploitation requires attacker-controlled XML to reach an affected parser; disclosure is limited to resources readable or reachable by the CoreNLP process.
The record
- CVE
- CVE-2021-3869
- Published
- Oct 19, 2021
- Updated
- Aug 3, 2024
- Vendor
- Stanford NLP Group
- Product
- Stanford CoreNLP
- Classifications
- CWE-611, T1005
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Oct 19, 2021CVE 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=unspecified <=4.3.0
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
- huntr.dev bounty proof of conceptproof of concept · unverified
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Technologies
Your stack
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Your stack
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