{"id":"CVE-2020-25110","aliases":["EUVD-2020-17801","GHSA-45rr-9gf8-j69p"],"status":"published","title":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a...","description":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.","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":"2026-11-10","score":0.53699,"percentile":0.99004,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-125"],"published":"2020-12-11T22:59:38Z","modified":"2026-06-17T03:06:23Z","products":[{"vendor":"ethernut","product":"nut\\/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-2020-25110"},{"url":"https://github.com/advisories/GHSA-45rr-9gf8-j69p"}],"sources":{"cve":[{"id":"CVE-2020-25110","description":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.","status":"published","published":"2020-12-11T22:59:38Z","modified":"2024-08-04T15:26:09.892Z","updated_at":"2026-11-02T14:35:48.52216Z"}],"euvd":[{"id":"EUVD-2020-17801","description":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.","status":"published","published":"2020-12-11T22:59:38Z","modified":"2024-08-04T15:26:09Z","updated_at":"2026-11-03T03:07:18.192905Z"}],"ghsa":[{"id":"GHSA-45rr-9gf8-j69p","title":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a...","description":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.","status":"published","published":"2022-05-24T17:36:12Z","modified":"2023-01-29T05:05:02Z","cwes":["CWE-125"],"updated_at":"2026-11-02T14:45:41.669563Z"}],"nvd":[{"id":"CVE-2020-25110","description":"An issue was discovered in the DNS implementation in Ethernut in Nut/OS 5.1. The length byte of a domain name in a DNS query/response is not checked, and is used for internal memory operations. This may lead to successful Denial-of-Service, and possibly Remote Code Execution.","status":"published","published":"2020-12-11T23:15:14.433Z","modified":"2026-06-17T03:06:23.547Z","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-125"],"updated_at":"2026-11-02T14:06:27.10541Z"}]}}