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    CVE-2021-27393

    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.

    Published:Apr 22, 2021
    Last Modified:Nov 21, 2024
    EPS:Apr 22, 2021
    EPSS Score:0.00218
    CVSS Score:5.3

    Affected Products

    Vendor
    Siemens
    Product
    Nucleus Net
    Vendor
    Siemens
    Product
    Nucleus Readystart V3
    Vendor
    Siemens
    Product
    Nucleus Source Code

    Exploits

    No exploit reference

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    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High