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.
History

No history.

cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published: 2023-06-06T17:35:54.699Z

Updated: 2024-08-02T16:01:54.110Z

Reserved: 2023-05-25T21:56:51.246Z

Link: CVE-2023-34104

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Modified

Published: 2023-06-06T18:15:11.643

Modified: 2024-01-22T18:15:20.003

Link: CVE-2023-34104

cve-icon Redhat

Severity : Moderate

Publid Date: 2023-06-06T00:00:00Z

Links: CVE-2023-34104 - Bugzilla