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    CVE-2021-38311

    In Contiki 3.0, potential nonterminating acknowledgment loops exist in the Telnet service. When the negotiated options are already disabled, servers still respond to DONT and WONT requests with WONT or DONT commands, which may lead to infinite acknowledgment loops, denial of service, and excessive CPU consumption.

    Published:Aug 9, 2021
    Last Modified:Nov 21, 2024
    EPS:Aug 9, 2021
    EPSS Score:0.0028
    CVSS Score:7.5

    Affected Products

    Vendor
    Contiki-os
    Product
    Contiki

    Exploits

    https://github.com/contiki-os/contiki/issues/2685https://github.com/contiki-os/contiki/issues/2685

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2021-40523 (CVSS 7.5) — In Contiki 3.0, Telnet option negotiation is mishandled. During negotiation between a server and a client, the…
    CVE-2021-38386 (CVSS 7.5) — In Contiki 3.0, a buffer overflow in the Telnet service allows remote attackers to cause a denial of service b…
    CVE-2021-38387 (CVSS 7.5) — In Contiki 3.0, a Telnet server that silently quits (before disconnection with clients) leads to connected cli…
    CVE-2021-28362 (CVSS 7.5) — An issue was discovered in Contiki through 3.0. When sending an ICMPv6 error message because of invalid extens…
    CVE-2020-24335 (CVSS 7.5) — An issue was discovered in uIP through 1.0, as used in Contiki and Contiki-NG. Domain name parsing lacks bound…
    CVE-2020-24336 (CVSS 9.8) — An issue was discovered in Contiki through 3.0 and Contiki-NG through 4.5. The code for parsing Type A domain …
    CVE-2020-24334 (CVSS 8.2) — The code that processes DNS responses in uIP through 1.0, as used in Contiki and Contiki-NG, does not check wh…
    CVE-2020-17440 (CVSS 7.5) — An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming D…
    CVE-2020-17439 (CVSS 8.3) — An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that parses incoming D…
    CVE-2020-17438 (CVSS 9.8) — An issue was discovered in uIP 1.0, as used in Contiki 3.0 and other products. The code that reassembles fragm…

    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