{"id":"CVE-2020-22284","aliases":["DEBIAN-CVE-2020-22284","EUVD-2020-15049","GHSA-4f64-6qh9-pmfj","UBUNTU-CVE-2020-22284"],"status":"published","title":"A buffer overflow vulnerability in the zepif_linkoutput() function of Free Software Foundation...","description":"A buffer overflow vulnerability in the zepif_linkoutput() function of Free Software Foundation lwIP git head version and version 2.1.2 allows attackers to access sensitive information via a crafted 6LoWPAN packet.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.01206,"percentile":0.68531,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-120"],"published":"2021-07-22T19:38:09Z","modified":"2026-10-26T12:02:39Z","fixes":[{"ecosystem":"Debian:12","package":"lwip","fixed_in":["2.1.3+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"lwip","fixed_in":["2.1.3+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"lwip","fixed_in":["2.1.3+dfsg1-1"],"sources":["osv"]},{"ecosystem":"Ubuntu:Pro:20.04:LTS","package":"lwip","fixed_in":["2.1.2+dfsg1-4ubuntu0.1~esm1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.3+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.3+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.3+dfsg1-1"}]}]},{"source":"osv","ecosystem":"Ubuntu:Pro:20.04:LTS","package":"lwip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.1.2+dfsg1-4ubuntu0.1~esm1"}]}],"versions":["2.1.2-3","2.1.2-5.1","2.1.2+dfsg1-1","2.1.2+dfsg1-4"]}],"products":[{"vendor":"lwip_project","product":"lwip"}],"references":[{"url":"https://savannah.nongnu.org/bugs/index.php?58554","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-22284"},{"url":"https://github.com/advisories/GHSA-4f64-6qh9-pmfj"},{"url":"https://security-tracker.debian.org/tracker/CVE-2020-22284","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2020-22284","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2020-22284","tags":["report"]},{"url":"https://ubuntu.com/security/notices/USN-8423-1","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2020-22284","description":"A buffer overflow vulnerability in the zepif_linkoutput() function of Free Software Foundation lwIP git head version and version 2.1.2 allows attackers to access sensitive information via a crafted 6LoWPAN packet.","status":"published","published":"2021-07-22T19:38:09Z","modified":"2024-08-04T14:51:10.633Z","updated_at":"2026-11-02T14:35:47.22408Z"}],"euvd":[{"id":"EUVD-2020-15049","description":"A buffer overflow vulnerability in the zepif_linkoutput() function of Free 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information via a crafted 6LoWPAN packet.","status":"published","published":"2021-07-22T20:15:00Z","modified":"2026-06-18T00:30:09.577532776Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","level":"high"}],"updated_at":"2026-11-02T15:54:23.905183Z"}]}}