{"id":"CVE-2020-25112","aliases":["EUVD-2020-17803","GHSA-j8h5-g58p-q4rv"],"status":"published","title":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks...","description":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.","severity":{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.27864,"percentile":0.98108,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-787"],"published":"2020-12-11T23:01:24Z","modified":"2026-06-17T03:06:23Z","products":[{"vendor":"contiki-os","product":"contiki-os"}],"references":[{"url":"https://www.kb.cert.org/vuls/id/815128","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://us-cert.cisa.gov/ics/advisories/icsa-20-343-01","tags":["x_refsource_MISC","x_transferred","Third Party Advisory","US Government Resource"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-25112"},{"url":"https://github.com/advisories/GHSA-j8h5-g58p-q4rv"}],"sources":{"cve":[{"id":"CVE-2020-25112","description":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.","status":"published","published":"2020-12-11T23:01:24Z","modified":"2024-08-04T15:26:09.543Z","updated_at":"2026-11-02T14:35:48.854892Z"}],"euvd":[{"id":"EUVD-2020-17803","description":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.","status":"published","published":"2020-12-11T23:01:24Z","modified":"2024-08-04T15:26:09Z","updated_at":"2026-11-03T03:07:18.192905Z"}],"ghsa":[{"id":"GHSA-j8h5-g58p-q4rv","title":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks...","description":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.","status":"published","published":"2022-05-24T17:36:12Z","modified":"2023-01-29T05:05:40Z","cwes":["CWE-787"],"updated_at":"2026-11-02T14:45:50.827495Z"}],"nvd":[{"id":"CVE-2020-25112","description":"An issue was discovered in the IPv6 stack in Contiki through 3.0. There are inconsistent checks for IPv6 header extension lengths. This leads to Denial-of-Service and potential Remote Code Execution via a crafted ICMPv6 echo packet.","status":"published","published":"2020-12-11T23:15:14.557Z","modified":"2026-06-17T03:06:23.76Z","cvss":[{"version":"3.1","score":9.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-787"],"updated_at":"2026-11-02T14:06:27.10541Z"}]}}