GHSA-mph8-6787-r8hw

Use After Free in Hermes

Source: GitHub Advisory Database (reviewed) Critical CVE-2021-24037

Packages

Ecosystem	Package	Affected	Fixed in
npm	hermes-engine	< 0.8.0	0.8.0

Details

As written in the advisory (Markdown source, shown as plain text).

A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e 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

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2021-24037 advisory
https://github.com/facebook/hermes/commit/d86e185e485b6330216dee8e854455c694e3a36e web
https://github.com/facebook/hermes package
https://www.facebook.com/security/advisories/CVE-2021-24037 web