PT-2021-15663 · Facebook · Facebook Hermes

Published 2021-12-13 · Updated 2021-12-15 · CVE-2021-24045

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions: Facebook Hermes versions prior to 0.10.0

Description: A type confusion issue could be triggered when resolving the typeof unary operator in Facebook Hermes. This is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Most React Native applications are not affected.

Recommendations: For Facebook Hermes versions prior to 0.10.0, update to version 0.10.0 or later to resolve the issue. As a temporary workaround, consider restricting the evaluation of untrusted JavaScript in applications using Hermes.

Fix

Type Confusion

Weakness Enumeration

CWE-843

Related Identifiers

CVE-2021-24045

Affected Products

Facebook Hermes

References · 5

• https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2 · Patch
• https://osv.dev/vulnerability/CVE-2021-24045 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-24045 · Security Note
• https://facebook.com/security/advisories/cve-2021-24045 · Vendor Advisory
• https://t.me/cibsecurity/33890 · Telegram Post