GitHub Advisoryadvisory · npm

GHSA-5fg8-2547-mr8q Misinterpretation of malicious XML input

MEDIUM Published 2021-08-03 Modified 2024-02-22 Official page ↗
Aliases
CVE-2021-32796
Ecosystem
npm
Packages
xmldom, @xmldom/xmldom
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Weaknesses
CWE-116
Reviewed
2021-08-02

Affected packages

• npm xmldom: <= 0.6.0 (no fix yet) • npm @xmldom/xmldom: < 0.7.0 → fixed in 0.7.0

Description

Impact xmldom versions 0.6.0 and older do not correctly escape special characters when serializing elements removed from their ancestor. This may lead to unexpected syntactic changes during XML processing in some downstream applications. Patches Update to one of the fixed versions of `@xmldom/xmldom` (`>=0.7.0`) See issue #271 for the status of publishing `xmldom` to npm or join #270 for Q&A/discussion until it's resolved. Workarounds Downstream applications can validate the input and reject the maliciously crafted documents. References Similar to this one reported on the Go standard library: • https://mattermost.com/blog/coordinated-disclosure-go-xml-vulnerabilities/ • https://mattermost.com/blog/securing-xml-implementations-across-the-web/ For more information If you have any questions or comments about this advisory: • Open an issue in `xmldom/xmldom` • Email us: send an email to all addresses that are shown by `npm owner ls @xmldom/xmldom`

Related

Alias · CVE (1)

  • CVE-2021-32796 xmldom is an open source pure JavaScript W3C standard-based (XML DOM Level 2 Core) DOMParser and XMLSerializer module. vulnerability

Weakness · CWE (1)

  • CWE-116 Improper Encoding or Escaping of Output weakness

References