Vulnerability in Motorola Mobile Radio
CVE-2022-26943
The Motorola MTM5000 series firmwares generate TETRA authentication challenges using a PRNG using a tick count register as its sole entropy source. Low boottime entropy and limited re-seeding of the pool renders the authentication challenge vulnerable to two attacks. First, due to the limited boottime pool entropy, an adversary can derive the contents of the entropy pool by an exhaustive search of possible values, based on an observed authentication challenge. Second, an adversary can use knowledge of the entropy pool to predict authentication challenges. As such, the unit is vulnerable to CVE-2022-24400.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.004 (28.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 28th percentile — 28.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: +0.000
Affected products
Weakness classification (CWE)
References
- tetraburst.com/ (Technical Description, related)
Frequently asked questions
- What is CVE-2022-26943?
- CVE-2022-26943 is a high-severity vulnerability in Motorola Mobile Radio, classified under Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG). CVSS score: 8.8/10. Published 2023-10-19.
- How severe is CVE-2022-26943?
- High severity. CVSS v3 base score is 8.8 out of 10.