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Access of Resource Using Incompatible Type in Facebook Hermes

Critical severity GitHub Reviewed Published May 24, 2022 to the GitHub Advisory Database • Updated Jan 27, 2023

Package

npm hermes-engine (npm)

Affected versions

<= 0.4.3

Patched versions

0.5.2

Description

A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

References

Published by the National Vulnerability Database Sep 4, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jun 24, 2022
Last updated Jan 27, 2023

Severity

Critical
9.8
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
Low
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weaknesses

CVE ID

CVE-2020-1911

GHSA ID

GHSA-f5x2-xv93-4p23

Source code

No known source code
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