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.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTNIST
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
facebookCNA
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CVEADP
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CISA-ADPADP
9.8 CRITICAL
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 60%
VendorProductVersion
facebookhermes
𝑥
< 2023-02-02
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80
https://www.facebook.com/security/advisories/cve-2023-23556
https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80
https://www.facebook.com/security/advisories/cve-2023-23556