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    CVE-2021-25664

    A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR Classic R20-11 (All versions < V2303), Nucleus NET (All versions), Nucleus ReadyStart V3 (All versions < V2017.02.4), Nucleus ReadyStart V4 (All versions < V4.1.0), Nucleus Source Code (All versions including affected IPv6 stack). The function that processes the Hop-by-Hop extension header in IPv6 packets and its options lacks any checks against the length field of the header, allowing attackers to put the function into an infinite loop by supplying arbitrary length values.

    Published:Apr 22, 2021
    Last Modified:Mar 11, 2025
    EPS:Apr 22, 2021
    EPSS Score:0.00523
    CVSS Score:7.5

    Affected Products

    Vendor
    Siemens
    Product
    Capital Vstar
    Vendor
    Siemens
    Product
    Nucleus Net
    Vendor
    Siemens
    Product
    Nucleus Readystart V3
    Vendor
    Siemens
    Product
    Nucleus Readystart V4
    Vendor
    Siemens
    Product
    Nucleus Source Code

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2021-31890 (CVSS 7.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31889 (CVSS 7.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31885 (CVSS 7.5) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31884 (CVSS 9.8) — A vulnerability has been identified in APOGEE MBC (PPC) (BACnet) (All versions), APOGEE MBC (PPC) (P2 Ethernet…
    CVE-2021-31883 (CVSS 7.1) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31882 (CVSS 6.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31881 (CVSS 7.1) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31346 (CVSS 8.2) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31345 (CVSS 7.5) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…
    CVE-2021-31344 (CVSS 6.9) — A vulnerability has been identified in Capital Embedded AR Classic 431-422 (All versions), Capital Embedded AR…

    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