Critical severity · published Jun 15, 2021
CVE-2021-24037
A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e allows attackers to potentially execute arbitrary code…
9.8
CVSS
1.8%
EPSS
No
On KEV
Description
A use after free in hermes, while emitting certain error messages, prior to commit d86e185e485b6330216dee8e854455c694e3a36e allows attackers to potentially execute arbitrary code via crafted JavaScript. Note that this is only exploitable if the application using Hermes permits evaluation of untrusted JavaScript. Hence, most React Native applications are not affected.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.8% · higher than 78% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
HE
Hermes · Facebook
before 0.8.0 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-24037
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-24037
Patch
https://github.com/facebook/hermes/commit/d86e185e485b6330216dee8e854455c694e3a36e
Vendor Advisory
https://www.facebook.com/security/advisories/CVE-2021-24037
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