CRITICAL9.8

GHSA-327c-qx3v-h673

Always-Incorrect Control Flow Implementation in Facebook Hermes

Quick fix

GHSA-327c-qx3v-h673 — hermes-engine: upgrade to the fixed version with the command below.

npm install hermes-engine@0.7.2

Details

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.

Are you affected?

Enter the version of the package you're using.

Affected packages

npm/hermes-engine

Introduced in: 0Fixed in: 0.7.2

Fixnpm install hermes-engine@0.7.2

References

https://nvd.nist.gov/vuln/detail/CVE-2020-1914[ADVISORY]
https://github.com/facebook/hermes/issues/373[WEB]
https://github.com/facebook/hermes/commit/b2021df620824627f5a8c96615edbd1eb7fdddfc[WEB]
https://github.com/facebook/hermes[PACKAGE]
https://www.facebook.com/security/advisories/cve-2020-1914[WEB]