CVE-2023-24833: Use After Free
First published: Thu May 18 2023(Updated: )
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.
Credit: cve-assign@fb.com cve-assign@fb.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Facebook Hermes | <2023-02-02 |
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Reference Links
Frequently Asked Questions
What is CVE-2023-24833?
CVE-2023-24833 is a use-after-free vulnerability in BigIntPrimitive addition in the Hermes JavaScript engine prior to commit a6dcafe6ded8e61658b40f5699878cd19a481f80.
How does CVE-2023-24833 affect Facebook Hermes?
CVE-2023-24833 affects Facebook Hermes versions prior to 2023-02-02.
What is the severity of CVE-2023-24833?
The severity of CVE-2023-24833 is high with a CVSS score of 7.5.
How can an attacker exploit CVE-2023-24833?
An attacker can exploit CVE-2023-24833 to leak raw data from the Hermes VM's heap by executing untrusted JavaScript using Hermes.
How do I fix CVE-2023-24833?
To fix CVE-2023-24833, update to the latest version of Facebook Hermes after commit a6dcafe6ded8e61658b40f5699878cd19a481f80.
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