Use of insufficiently random values in Nut/Net - CVE-2020-27213

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Main Vulnerability Database Vulnerabilities #VU50593

Use of insufficiently random values in Nut/Net - CVE-2020-27213

Published: February 10, 2021


Vulnerability identifier: #VU50593
CSH Severity: Medium
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2020-27213
CWE-ID: CWE-330
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vendor: ethernut
Affected software:
Nut/Net

Detailed vulnerability description

The vulnerability allows a remote attacker to compromise the target system.

The vulnerability exists due to the ISN generator relies on a highly predictable source (system timer) and has constant increments. A remote attacker can interfere with traffic, spoof the connection and gain access to sensitive information.  


How to mitigate CVE-2020-27213

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Sources