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CVE-2023-34104

CVE-2023-34104 · Regex Injection via Doctype Entities

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

fast-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.

CVSS 7.5 · Alta · EPSS 1,1% · Corrección disponible

Publicación
Actualización

Pila tecnológica: node

Productos y versiones afectados

  • fast-xml-parser

    Versiones
    • >= 4.1.3, < 4.2.4: Afectada

    Sin corrección publicada

  • fast-xml-parser npm

    Intervalos de versiones afectados
    • SEMVER: ≥ 4.1.3, < 4.2.4

    Actualiza a 4.2.4

Fuentes originales

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