PT-2021-14448 · Xmldom+2 · Xmldom+2

Brody4Hire · Published 2021-03-12 · Updated 2023-05-24 · CVE-2021-21366

Positive Technologies (AI Summary)

CVSS v3.1

4.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N

Name of the Vulnerable Software and Affected Versions xmldom versions 0.4.0 and older

Description The issue arises when xmldom versions 0.4.0 and older fail to correctly preserve system identifiers, FPIs, or namespaces when repeatedly parsing and serializing maliciously crafted documents. This may lead to unexpected syntactic changes during XML processing in some downstream applications.

Recommendations For versions 0.4.0 and older, update to version 0.5.0. As a temporary workaround, downstream applications can validate the input and reject the maliciously crafted documents.

Exploit

Fix

Weakness Enumeration

CWE-436

CWE-115

Related Identifiers

CVE-2021-21366

DLA-3260-1

GHSA-H6Q6-9HQW-RWFV

USN-6102-1

Affected Products

Linuxmint

Ubuntu

Xmldom

References · 22

• 🔥 https://github.com/doyensec/CVE-2022-39299_PoC_Generator · Exploit
• https://github.com/xmldom/xmldom/security/advisories/GHSA-h6q6-9hqw-rwfv · Vendor Advisory
• https://github.com/xmldom/xmldom/commit/d4201b9dfbf760049f457f9f08a3888d48835135 · Patch
• https://ubuntu.com/security/CVE-2021-21366 · Vendor Advisory
• https://osv.dev/vulnerability/UBUNTU-CVE-2021-21366 · Vendor Advisory
• https://osv.dev/vulnerability/USN-6102-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-6102-1 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21366 · Security Note
• https://osv.dev/vulnerability/DLA-3260-1 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-h6q6-9hqw-rwfv · Vendor Advisory
• https://security-tracker.debian.org/tracker/CVE-2021-21366 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-37616 · Vendor Advisory
• https://ubuntu.com/security/CVE-2022-39353 · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-21366 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2021-21366 · Vendor Advisory