CVE-2023-34104

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Summary

CVECVE-2023-34104
StatePUBLIC
Assigner[email protected]
Source PriorityCVE Program / NVD first with legacy fallback
Published2023-06-06 18:15:00 UTC
Updated2023-06-13 16:26:00 UTC
Descriptionfast-xml-parser is an open source, pure javascript xml parser. fast-xml-parser allows special characters in entity names, which are not escaped or sanitized. Since the entity name is used for creating a regex for searching and replacing entities in the XML body, an attacker can abuse it for denial of service (DoS) attacks. By crafting an entity name that results in an intentionally bad performing regex and utilizing it in the entity replacement step of the parser, this can cause the parser to stall for an indefinite amount of time. This problem has been resolved in v4.2.4. Users are advised to upgrade. Users unable to upgrade should avoid using DOCTYPE parsing by setting the `processEntities: false` option.

Risk And Classification

Problem Types: CWE-1333

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Fast-xml-parser Project Fast-xml-parser All All All All

References

ReferenceSourceLinkTags
Regex Injection via Doctype Entities · Advisory · NaturalIntelligence/fast-xml-parser · GitHub MISC github.com
fix security bug · NaturalIntelligence/fast-xml-parser@39b0e05 · GitHub MISC github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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