Vulnerability Details : CVE-2023-23556

An error in BigInt conversion to Number in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by a malicious attacker to execute arbitrary code due to an out-of-bound write. Note that this bug is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.
Vulnerability category: Memory CorruptionExecute code
Published 2023-05-18 22:15:09
Updated 2023-05-26 23:32:28
Source Facebook, Inc.
View at NVD,   CVE.org

Exploit prediction scoring system (EPSS) score for CVE-2023-23556

Probability of exploitation activity in the next 30 days: 0.13%

Percentile, the proportion of vulnerabilities that are scored at or less: ~ 48 % EPSS Score History EPSS FAQ

CVSS scores for CVE-2023-23556

Base Score Base Severity CVSS Vector Exploitability Score Impact Score Source
9.8
 CRITICAL CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
3.9
5.9
 nvd@nist.gov

CWE ids for CVE-2023-23556

  • The product writes data past the end, or before the beginning, of the intended buffer.
    Assigned by:
    • cve-assign@fb.com (Secondary)
    • nvd@nist.gov (Primary)

References for CVE-2023-23556

Products affected by CVE-2023-23556

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