Out-of-bounds Write Affecting facebook/hermes package, versions [0,)


Severity

Recommended
0.0
critical
0
10

CVSS assessment made by Snyk's Security Team. Learn more

Threat Intelligence

Exploit Maturity
Not Defined
EPSS
0.44% (75th percentile)

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  • Snyk IDSNYK-UNMANAGED-FACEBOOKHERMES-5563629
  • published19 May 2023
  • disclosed19 May 2023
  • creditUnknown

Introduced: 19 May 2023

CVE-2023-23556  (opens in a new tab)
CWE-787  (opens in a new tab)

How to fix?

A fix was pushed into the master branch but not yet published.

Overview

Affected versions of this package are vulnerable to Out-of-bounds Write due to an error in BigInt conversion to Number which could have been used by a malicious attacker to execute arbitrary code.

Note: This bug is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

CVSS Scores

version 3.1