What is CVE-2021-42147?

CVE-2021-42147 is a critical-severity vulnerability in Contiki-ng Tinydtls, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2024-01-24.

How severe is CVE-2021-42147?

Critical severity. CVSS v3 base score is 9.1 out of 10.

Out-of-bounds Read in Contiki-ng Tinydtls

CVE-2021-42147

Buffer over-read vulnerability in the dtls_sha256_update function in Contiki-NG tinyDTLS through master branch 53a0d97 allows remote attackers to cause a denial of service via crafted data packet.

Vulnerability class: Buffer Overflow

EPSS: 0.008 (53.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.1 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H.

Affected products

Contiki-ng Tinydtls — versions 2018-08-30
N/a — versions n/a

Weakness classification (CWE)

CWE-125 — Out-of-bounds Read

References

cve@mitre.org (Mailing List, Third Party Advisory)
af854a3a-2127-422b-91ae-364da2661108

Frequently asked questions

What is CVE-2021-42147?: CVE-2021-42147 is a critical-severity vulnerability in Contiki-ng Tinydtls, classified under Out-of-bounds Read. CVSS score: 9.1/10. Published 2024-01-24.
How severe is CVE-2021-42147?: Critical severity. CVSS v3 base score is 9.1 out of 10.