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CVE-2023-23557

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Date: May 18, 2023

An error in Hermes' algorithm for copying objects properties prior to commit a00d237346894c6067a594983be6634f4168c9ad could be used by a malicious attacker to execute arbitrary code via type confusion. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Language: C++

Severity Score

Related Resources (4)

https://nvd.nist.gov/vuln/detail/CVE-2023-23557
https://www.facebook.com/security/advisories/cve-2023-23557
https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad
https://www.mend.io/vulnerability-database/CVE-2023-23557

Severity Score

Weakness Type (CWE)

Access of Resource Using Incompatible Type ('Type Confusion')

CWE-843

Top Fix

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Upgrade Version

Upgrade to version hermes-2023-03-20-RNv0.72.0-49794cfc7c81fb8f69fd60c3bbf85a7480cc5a77

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): HIGH
Integrity (I): HIGH
Availability (A): HIGH

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