CVE-2021-24045

Description

A type confusion vulnerability could be triggered when resolving the "typeof" unary operator in Facebook Hermes prior to v0.10.0. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 0.55%
Vendor Advisory facebook.com
Affected: Facebook Hermes
Published at:
Updated at:

References

Link Tags
https://www.facebook.com/security/advisories/cve-2021-24045 vendor advisory
https://github.com/facebook/hermes/commit/55e1b2343f4deb1a1b5726cfe1e23b2068217ff2 third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2021-24045?
CVE-2021-24045 has been scored as a critical severity vulnerability.
How to fix CVE-2021-24045?
To fix CVE-2021-24045, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-24045 being actively exploited in the wild?
As for now, there are no information to confirm that CVE-2021-24045 is being actively exploited. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
What software or system is affected by CVE-2021-24045?
CVE-2021-24045 affects Facebook Hermes.
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