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Always-Incorrect Control Flow Implementation 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

<= 0.7.1

Patched versions

0.7.2

Description

A logic vulnerability when handling the SaveGeneratorLong instruction in Facebook Hermes prior to commit b2021df620824627f5a8c96615edbd1eb7fdddfc allows attackers to potentially read out of bounds or theoretically 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 Oct 8, 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-2020-1914

GHSA ID

GHSA-327c-qx3v-h673

Source code

Credits

Checking history
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