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    CVE-2021-27565

    The web server in InterNiche NicheStack through 4.0.1 allows remote attackers to cause a denial of service (infinite loop and networking outage) via an unexpected valid HTTP request such as OPTIONS. This occurs because the HTTP request handler enters a miscoded wbs_loop() debugger hook.

    Published:Aug 19, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 19, 2021
    EPSS Score:0.02416
    CVSS Score:7.5

    Affected Products

    Vendor
    Hcc-embedded
    Product
    Nichestack

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2021-31401 (CVSS 7.5) — An issue was discovered in tcp_rcv() in nptcp.c in HCC embedded InterNiche 4.0.1. The TCP header processing co…
    CVE-2020-35685 (CVSS 9.1) — An issue was discovered in HCC Nichestack 3.0. The code that generates Initial Sequence Numbers (ISNs) for TCP…
    CVE-2020-35684 (CVSS 7.5) — An issue was discovered in HCC Nichestack 3.0. The code that parses TCP packets relies on an unchecked value o…
    CVE-2020-35683 (CVSS 7.5) — An issue was discovered in HCC Nichestack 3.0. The code that parses ICMP packets relies on an unchecked value …
    CVE-2021-36762 (CVSS 7.5) — An issue was discovered in HCC Embedded InterNiche NicheStack through 4.3. The tfshnd():tftpsrv.c TFTP packet …
    CVE-2021-31400 (CVSS 7.5) — An issue was discovered in tcp_pulloutofband() in tcp_in.c in HCC embedded InterNiche 4.0.1. The TCP out-of-ba…
    CVE-2021-31228 (CVSS 7.5) — An issue was discovered in HCC embedded InterNiche 4.0.1. This vulnerability allows the attacker to predict a …
    CVE-2021-31227 (CVSS 7.5) — An issue was discovered in HCC embedded InterNiche 4.0.1. A potential heap buffer overflow exists in the code …

    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