Vulnerability in Facebook Hermes
CVE-2021-24044
By passing invalid javascript code where await and yield were called upon non-async and non-generator getter/setter functions, Hermes would invoke generator functions and error out on invalid await/yield positions. This could result in segmentation fault as a consequence of type confusion error, with a low chance of RCE. This issue affects Hermes versions prior to v0.10.0.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.013 (69.4th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 69th percentile — 69.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.013 · newest: 0.013 · change: 0.000
Affected products
- Facebook Hermes — versions 0.10.0, unspecified
Weakness classification (CWE)
References
- www.facebook.com/security/advisories/cve-2021-24044 (Vendor Advisory)
Frequently asked questions
- What is CVE-2021-24044?
- CVE-2021-24044 is a critical-severity vulnerability in Facebook Hermes, classified under Access of Resource Using Incompatible Type (Type Confusion). CVSS score: 9.8/10. Published 2022-01-15.
- How severe is CVE-2021-24044?
- Critical severity. CVSS v3 base score is 9.8 out of 10.