Out-of-bounds Read in Jerryscript

CVE-2021-43453

A Heap-based Buffer Overflow vulnerability exists in JerryScript 2.4.0 and prior versions via an out-of-bounds read in parser_parse_for_statement_start in the js-parser-statm.c file. This issue is similar to CVE-2020-29657.

Vulnerability class: Buffer Overflow

EPSS: 0.012 (66.0th percentile) — read the EPSS interpretation.

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.

Affected products

Weakness classification (CWE)

References

  • cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC, Issue Tracking)

Frequently asked questions

What is CVE-2021-43453?
CVE-2021-43453 is a critical-severity vulnerability in Jerryscript, classified under Out-of-bounds Read. CVSS score: 9.8/10. Published 2022-04-07.
How severe is CVE-2021-43453?
Critical severity. CVSS v3 base score is 9.8 out of 10.