{"id":"CVE-2018-20578","url":"https://www.cyber-defence.io/tools/cve/CVE-2018-20578","generatedAt":"2026-10-29T01:56:41.388Z","title":"An issue was discovered in NuttX before 7.27.","description":"An issue was discovered in NuttX before 7.27. The function netlib_parsehttpurl() in apps/netutils/netlib/netlib_parsehttpurl.c mishandles URLs longer than hostlen bytes (in the webclient, this is set by default to 40), leading to an Infinite Loop. The attack vector is the Location header of an HTTP 3xx response.","published":"2018-12-28T18:29:00.000Z","lastModified":"2026-06-17T01:53:07.000Z","status":"Modified","sourceIdentifier":"cve@mitre.org","cvss":{"version":"3.0","score":7.5,"severity":"HIGH","vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"cwe":["CWE-835"],"affected":["nuttx/nuttx"],"epss":{"score":0.01599,"percentile":0.75649,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (1.60%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[],"references":[{"url":"https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txt","tags":["Release Notes","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while","tags":["Exploit","Patch","Third Party Advisory"],"source":"cve@mitre.org"},{"url":"https://bitbucket.org/nuttx/nuttx/downloads/nuttx-7_27-README.txt","tags":["Release Notes","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://bitbucket.org/nuttx/nuttx/issues/119/denial-of-service-infinite-loop-while","tags":["Exploit","Patch","Third Party Advisory"],"source":"af854a3a-2127-422b-91ae-364da2661108"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2018-20578","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}