CVE-2021-31401

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    CVE-2021-31401

    Published: 19 Aug 2021Last Modified: 10 Mar 2026

    Summary:

    Details: An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. The TCP header processing code doesn't sanitize the value of the IP total length field (header length + data length). With a crafted IP packet, an integer overflow occurs whenever the value of the IP data length is calculated by subtracting the length of the header from the total length of the IP packet.

    References: , https://cert-portal.siemens.com/productcert/pdf/ssa-789208.pdf, https://www.forescout.com/blog/new-critical-operational-technology-vulnerabilities-found-on-nichestack/, https://www.kb.cert.org/vuls/id/608209

    Affected packages

    Package

    Name:

    Purl:

    Affected ranges

    Type: N/A

    Events:

    Introduced- None
    Fixed -None

    Affected versions

    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
    CVE-2021-31401 | CVE-DB