CVE-2021-27393

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Published: 22/04/2021 Updated: 22/04/2022

CVSS v2 Base Score: 5 | Impact Score: 2.9 | Exploitability Score: 10

CVSS v3 Base Score: 5.3 | Impact Score: 1.4 | Exploitability Score: 3.9

VMScore: 445

Vector: AV:N/AC:L/Au:N/C:N/I:P/A:N

A vulnerability has been identified in Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2013.08), Nucleus Source Code (Versions including affected DNS modules). The DNS client does not properly randomize UDP port numbers of DNS requests. That could allow an malicious user to poison the DNS cache or spoof DNS resolving.

Vulnerable Product	Search on Vulmon	Subscribe to Product
siemens nucleus net
siemens nucleus readystart v3
siemens nucleus source code -

Critical Infrastructure Sectors: Critical Manufacturing

CWE-330 https://cert-portal.siemens.com/productcert/pdf/ssa-201384.pdf https://nvd.nist.gov https://www.cisa.gov/uscert/ics/advisories/icsa-21-103-14

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CVE-2021-27393

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