A vulnerability has been identified in Nucleus NET (All versions), Nucleus RTOS (versions including affected DNS modules), Nucleus ReadyStart (All versions < V2013.08), Nucleus Source Code (versions including affected DNS modules), VSTAR (versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an attacker to poison the DNS cache or spoof DNS resolving.

Related CVEs

CVE-2021-27393

Key Information

GHSA ID

GHSA-x7x4-r59j-h6w9

Published

May 24, 2022 5:48 PM

Last Modified

May 24, 2022 5:48 PM

CVSS Score

5.0 /10

Primary Ecosystem

Unknown

Primary Package

Unknown

GitHub Reviewed

✗ No

Dataset

Last updated: June 14, 2025 6:24 AM

Data from GitHub Advisory Database. This information is provided for research and educational purposes.