CVE-2021-27393

VendorsiemensProductnucleus net, nucleus source code, nucleus readystart v3DiscoveredApr 22, 2021UpdatedNov 21, 2024

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 attacker to poison the DNS cache or spoof DNS resolving.

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CVSS v3.1

5.3 MEDIUM

EPSS

0.75%

probability of exploitation in 30 days

CISA KEV

Not listed

no confirmed exploitation reported

News coverage

sources referencing this CVE

Related IOCs

seen in the same coverage

CVSS v3.1 Detail

Attack VectorNETWORK

Attack ComplexityLOW

Privileges RequiredNONE

User InteractionNONE

ScopeUNCHANGED

ConfidentialityNONE

IntegrityLOW

AvailabilityNONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N

Connections

4 relationships

CWE-330

source

Timeline

disclosure → media coverage

Apr 22, 2021

Disclosure — published as a CVE record. · last revised by NVD Nov 21, 2024