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Signed to Unsigned Conversion Error in Facebook Hermes

High 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

An Integer signedness error in the JavaScript Interpreter in Facebook Hermes prior to commit 2c7af7ec481ceffd0d14ce2d7c045e475fd71dc6 allows attackers to cause a denial of service attack or a potential RCE 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 9, 2020
Published to the GitHub Advisory Database May 24, 2022
Reviewed Jun 24, 2022
Last updated Jan 27, 2023

Severity

High
8.1
/ 10

CVSS base metrics

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

Weaknesses

CVE ID

CVE-2020-1913

GHSA ID

GHSA-gmpm-xp43-f7g6

Source code

No known source code
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