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CVE-2021-43453

CRITICALCVSS 9.8/10EPSS 1.24%

Last modified

CVE-2021-43453 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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.. EPSS estimates a 1.24% chance of exploitation in the next 30 days.

Description

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.

Metrics

CVSS 3.1
9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability
1.24%

65.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
JerryscriptJerryscript<= 2.4.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is 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.
How severe is CVE-2021-43453?
CVE-2021-43453 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 1.24% probability of exploitation in the next 30 days.
How do I fix CVE-2021-43453?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-43453?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST