Use After Free Vulnerability in Hermes Affecting React Native Applications
CVE-2021-24037

9.8CRITICAL

Key Information:

Vendor

Facebook

Status
Hermes
Vendor
CVE Published:
15 June 2021

What is CVE-2021-24037?

A use after free vulnerability exists within the Hermes JavaScript engine, which can lead to arbitrary code execution when specific error messages are emitted. This situation arises when an application using Hermes allows the evaluation of untrusted JavaScript code. Typically, most React Native applications are safeguarded against this type of exploit since they do not accept untrusted JavaScript, minimizing the risk posed by this vulnerability.

Affected Version(s)

Hermes commit prior to d86e185e485b6330216dee8e854455c694e3a36e

References

https://github.com/facebook/hermes/commit/d86e185e485b633...
x_refsource_CONFIRM
https://www.facebook.com/security/advisories/CVE-2021-24037
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.
CVE-2021-24037 : Use After Free Vulnerability in Hermes Affecting React Native Applications