Vulnerability · Published May 18, 2023 · Assigned by facebook
CVE-2023-24833
High 7.5
In plain English
A high-severity security flaw 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 0.6% (higher than 51% of all known vulnerabilities).
Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.6%top 48.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official description
A use-after-free in BigIntPrimitive addition in Hermes prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80 could have been used by an attacker to leak raw data from Hermes VM’s heap. 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)
References
- https://www.facebook.com/security/advisories/cve-2023-24833 x_refsource_CONFIRM
- https://github.com/facebook/hermes/commit/a6dcafe6ded8e61658b40f5699878cd19a481f80 x_refsource_MISC