Use-After-Free Vulnerability in Hermes JavaScript Engine
CVE-2023-24833

7.5HIGH

Key Information:

Vendor

Facebook

Status
Hermes
Vendor
CVE Published:
18 May 2023

What is CVE-2023-24833?

A use-after-free vulnerability has been identified in the Hermes JavaScript engine, specifically within the BigIntPrimitive addition functionality. This flaw could potentially allow an attacker to leak sensitive raw data from the heap memory of the Hermes virtual machine. It is important to note that the risk of exploitation primarily arises when Hermes is employed to run untrusted JavaScript, which means that most applications built with React Native are not susceptible to this issue.

Affected Version(s)

Hermes 0

References

https://www.facebook.com/security/advisories/cve-2023-24833
x_refsource_CONFIRM
https://github.com/facebook/hermes/commit/a6dcafe6ded8e61...
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CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.