What is CVE-2020-27634?

CVE-2020-27634 is a critical-severity vulnerability in Contiki-Ng, classified under Use of Insufficiently Random Values. CVSS score: 9.1/10. Published 2023-10-10.

How severe is CVE-2020-27634?

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

Vulnerability in Contiki-Ng

CVE-2020-27634

In Contiki 4.5, TCP ISNs are improperly random.

EPSS: 0.017 (75.1th 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:H/A:N.

Affected products

Contiki-ng — versions 4.5
N/a — versions n/a

Weakness classification (CWE)

CWE-330 — Use of Insufficiently Random Values

References

cve@mitre.org (Third Party Advisory)
cve@mitre.org (US Government Resource, Third Party Advisory)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2020-27634?: CVE-2020-27634 is a critical-severity vulnerability in Contiki-Ng, classified under Use of Insufficiently Random Values. CVSS score: 9.1/10. Published 2023-10-10.
How severe is CVE-2020-27634?: Critical severity. CVSS v3 base score is 9.1 out of 10.