Vulnerability · Published Oct 19, 2023 · Assigned by NCSC-NL

CVE-2022-24401Keystream recovery for arbitrary frames in TETRA

High 8.8

In plain English

A high-severity security flaw in TETRA Standard from ETSI. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 27% of all known vulnerabilities).

Severity (CVSS 3.1)8.8High

Exploit odds (30 days)0.3%top 72.5% of all CVEs

Exploited in the wildNo reportsnot in CISA KEV

Attack toolingNoneno public tooling known

Official description

Adversary-induced keystream re-use on TETRA air-interface encrypted traffic using any TEA keystream generator. IV generation is based upon several TDMA frame counters, which are frequently broadcast by the infrastructure in an unauthenticated manner. An active adversary can manipulate the view of these counters in a mobile station, provoking keystream re-use. By sending crafted messages to the MS and analyzing MS responses, keystream for arbitrary frames can be recovered.

Affected products (as reported)

Vendor	Product	Versions
ETSI	TETRA Standard	all

Weakness: CWE-323 · Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H/E:F/RL:U/RC:C/CR:H/IR:H/AR:H/MAV:A/MAC:L/MPR:N/MUI:N/MS:U/MC:H/MI:H/MA:H

References

TETRA:BURST related