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    CVE-2021-21279

    Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In verions prior to 4.6, an attacker can perform a denial-of-service attack by triggering an infinite loop in the processing of IPv6 neighbor solicitation (NS) messages. This type of attack can effectively shut down the operation of the system because of the cooperative scheduling used for the main parts of Contiki-NG and its communication stack. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.

    Published:Jun 18, 2021
    Last Modified:Nov 21, 2024
    EPS:Jun 18, 2021
    EPSS Score:0.00296
    CVSS Score:7.5

    Affected Products

    Vendor
    Contiki-ng
    Product
    Contiki-ng

    Exploits

    No exploit reference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    CVE-2026-5856 (CVSS 7.1) — Contiki-NG's DNS/mDNS resolver skip_name() in os/services/resolv/resolv.c walks DNS wire-format name labels wi…
    CVE-2026-5855 (CVSS 8.7) — Contiki-NG's LwM2M TLV parser lwm2m_tlv_read() in os/services/lwm2m/lwm2m-tlv.c ignores its caller-supplied bu…
    CVE-2023-29001 (CVSS 8.7) — Contiki-NG is an open-source, cross-platform operating system for IoT devices. The Contiki-NG operating system…
    CVE-2024-41125 (CVSS 8.3) — Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte…
    CVE-2024-41126 (CVSS 8.3) — Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte…
    CVE-2024-47181 (CVSS 7.5) — Contiki-NG is an open-source, cross-platform operating system for IoT devices. An unaligned memory access can …
    CVE-2023-50926 (CVSS 7.5) — Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bound…
    CVE-2023-50927 (CVSS 8.6) — Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An attacker can…
    CVE-2023-48229 (CVSS 7) — Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bound…

    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