Vulnerability · Published May 18, 2023 · Assigned by facebook
CVE-2023-23557
Critical 9.8
In plain English
A critical-severity type confusion in Hermes from Facebook. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 60% of all known vulnerabilities).
Severity (CVSS 3.1)9.8Critical
Exploit odds (30 days)0.9%top 40.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
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.
Affected products (as reported)
Weakness: CWE-843 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
References
- https://www.facebook.com/security/advisories/cve-2023-23557 x_refsource_CONFIRM
- https://github.com/facebook/hermes/commit/a00d237346894c6067a594983be6634f4168c9ad x_refsource_MISC