PT-2021-15133 · Google · Dart Sdk

Vincenzo Di Cicco · Published 2021-04-22 · Updated 2021-04-26 · CVE-2021-22540

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Dart SDK versions prior to 2.12.3

Description The issue is related to bad validation logic in the Dart SDK, which allows an attacker to perform an XSS attack via DOM clobbering. Specifically, the validation logic in dart:html for creating DOM nodes from text did not properly sanitize template tags.

Recommendations For Dart SDK versions prior to 2.12.3, update to version 2.12.3 or later to resolve the issue. As a temporary workaround, consider restricting the use of dart:html for creating DOM nodes from text until a patch is available.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2021-22540

GHSA-3RFV-4JVG-9522

Affected Products

Dart Sdk

References · 5

• https://github.com/dart-lang/sdk/commit/ce5a1c2392debce967415d4c09359ff2555e3588 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2021-22540 · Security Note
• https://osv.dev/vulnerability/CVE-2021-22540 · Vendor Advisory
• https://github.com/dart-lang/sdk/security/advisories/GHSA-3rfv-4jvg-9522 · Note
• https://t.me/cvenotify/13753 · Telegram Post