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NOTICE UPDATE

NIST has updated the NVD program announcement page with additional information regarding recent concerns and the temporary delays in enrichment efforts.

CVE-2022-26943 Detail

Description

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.


Severity



CVSS 3.x Severity and Metrics:

NIST CVSS score matches with CNA score
CNA:  National Cyber Security Centre Netherlands (NCSC-NL)
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


NVD Analysts use publicly available information to associate vector strings and CVSS scores. We also display any CVSS information provided within the CVE List from the CNA.

Note: The NVD and the CNA have provided the same score. When this occurs only the CNA information is displayed, but the Acceptance Level icon for the CNA is given a checkmark to signify NVD concurrence.

References to Advisories, Solutions, and Tools

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Hyperlink Resource
https://tetraburst.com/ Technical Description 

Weakness Enumeration

CWE-ID CWE Name Source
CWE-338 Use of Cryptographically Weak Pseudo-Random Number Generator (PRNG) cwe source acceptance level NIST   Reference acceptance level National Cyber Security Centre Netherlands (NCSC-NL)  

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Change History

2 change records found show changes

Quick Info

CVE Dictionary Entry:
CVE-2022-26943
NVD Published Date:
10/19/2023
NVD Last Modified:
11/06/2023
Source:
National Cyber Security Centre Netherlands (NCSC-NL)