Type Confusion Vulnerability in Hermes Used in React Native Applications
CVE-2023-23557

9.8CRITICAL

Key Information:

Vendor

Facebook

Status
Hermes
Vendor
CVE Published:
18 May 2023

What is CVE-2023-23557?

A flaw in Hermes, a JavaScript engine developed by Facebook, allows attackers to leverage type confusion in the object properties copying algorithm. This vulnerability can facilitate the execution of arbitrary code if untrusted JavaScript is executed through Hermes. Although the risk is primarily posed to applications utilizing untrusted JavaScript, it is important to note that most React Native applications are unlikely to be impacted.

Affected Version(s)

Hermes 0

References

https://www.facebook.com/security/advisories/cve-2023-23557
x_refsource_CONFIRM
https://github.com/facebook/hermes/commit/a00d237346894c6...
x_refsource_MISC

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

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CVE-2023-23557 : Type Confusion Vulnerability in Hermes Used in React Native Applications