Type Confusion Vulnerability in Hermes by Facebook
CVE-2021-24044

9.8CRITICAL

Key Information:

Vendor

Facebook

Status
Hermes
Vendor
CVE Published:
15 January 2022

What is CVE-2021-24044?

Hermes, a JavaScript engine developed by Facebook, is vulnerable to a type confusion issue due to improper handling of JavaScript code involving 'await' and 'yield' on non-async and non-generator getter/setter functions. When incorrect JavaScript is passed, this could lead to the invocation of generator functions, resulting in a segmentation fault caused by type confusion errors. Affected versions of Hermes include all versions prior to v0.10.0, highlighting the importance of upgrading to prevent potential security risks.

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Affected Version(s)

Hermes < 0.10.0

Hermes 0.10.0

References

https://www.facebook.com/security/advisories/cve-2021-24044
x_refsource_CONFIRM

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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