Vulnerability Description
A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da 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.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Hermes | < 0.4.3 |
Related Weaknesses (CWE)
References
- https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27PatchThird Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory
- https://github.com/facebook/hermes/commit/fe52854cdf6725c2eaa9e125995da76e6ceb27PatchThird Party Advisory
- https://www.facebook.com/security/advisories/cve-2020-1911Third Party Advisory
FAQ
What is CVE-2020-1911?
CVE-2020-1911 is a vulnerability with a CVSS score of 9.8 (CRITICAL). A type confusion vulnerability when resolving properties of JavaScript objects with specially-crafted prototype chains in Facebook Hermes prior to commit fe52854cdf6725c2eaa9e125995da76e6ceb27da allow...
How severe is CVE-2020-1911?
CVE-2020-1911 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2020-1911?
Check the references section above for vendor advisories and patch information. Affected products include: Facebook Hermes.