Auth bypass in Etsi Tetra Standard

CVE-2022-24400

A flaw in the TETRA authentication procecure allows a MITM adversary that can predict the MS challenge RAND2 to set session key DCK to zero.

EPSS: 0.003 (18.9th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Etsi Tetra Standard — versions all
Midnightblue Tetra\ — versions burst

Weakness classification (CWE)

References

cert@ncsc.nl (related, Vendor Advisory)

Frequently asked questions

What is CVE-2022-24400?: CVE-2022-24400 is a high-severity vulnerability in Etsi Tetra Standard, classified under CWE-807. CVSS score: 7.5/10. Published 2023-10-19.
How severe is CVE-2022-24400?: High severity. CVSS v3 base score is 7.5 out of 10.