{"id":"CVE-2023-30362","aliases":["DEBIAN-CVE-2023-30362","EUVD-2023-34783","GHSA-v5wr-22jp-335p","OESA-2023-1701","OESA-2023-1702","UBUNTU-CVE-2023-30362"],"status":"published","title":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed...","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","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":"2026-11-10","score":0.00754,"percentile":0.55427,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-125"],"published":"2023-06-23T00:00:00Z","modified":"2026-11-09T12:49:20Z","fixes":[{"ecosystem":"Debian:13","package":"libcoap3","fixed_in":["4.3.1-2"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"libcoap3","fixed_in":["4.3.1-2"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP1","package":"dsoftbus","fixed_in":["1.0.0-5.oe2203sp1"],"sources":["osv"]},{"ecosystem":"openEuler:22.03-LTS-SP2","package":"dsoftbus","fixed_in":["1.0.0-5.oe2203sp2"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-1","4.3.1-2","4.3.3-1","4.3.4-1","4.3.4-1.1","4.3.4-1.1~exp1","4.3.5-1","4.3.5-2","4.3.5-3","4.3.5-4"]},{"source":"osv","ecosystem":"Debian:13","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-2"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.3.1-2"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP1","package":"dsoftbus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-5.oe2203sp1"}]}]},{"source":"osv","ecosystem":"openEuler:22.03-LTS-SP2","package":"dsoftbus","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.0-5.oe2203sp2"}]}]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"libcoap2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.0-2","4.2.1-1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libcoap2","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.2.1-1","4.2.1-1build1"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.0-2","4.3.0-2build1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.1-2","4.3.3-1","4.3.4-1","4.3.4-1.1build2","4.3.4-1.1build3","4.3.4-1.1build4"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1.1build4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.5-2","4.3.5-3","4.3.5-4","4.3.5-4ubuntu1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"libcoap3","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.3.4-1.1build4","4.3.5-1","4.3.5-2"]}],"products":[{"vendor":"libcoap","product":"libcoap"}],"references":[{"url":"https://github.com/obgm/libcoap/issues/1063","tags":["x_transferred","Exploit","Issue Tracking","Third Party Advisory","report"]},{"url":"https://github.com/obgm/libcoap/pull/1065","tags":["x_transferred","Patch","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-30362","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-v5wr-22jp-335p"},{"url":"https://security-tracker.debian.org/tracker/CVE-2023-30362","tags":["advisory"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1701","tags":["advisory"]},{"url":"https://www.openeuler.org/en/security/safety-bulletin/detail.html?id=openEuler-SA-2023-1702","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2023-30362","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2023-30362","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2023-30362","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","status":"published","published":"2023-06-23T00:00:00Z","modified":"2024-12-05T16:59:18.228Z","updated_at":"2026-11-02T14:35:22.640346Z"}],"euvd":[{"id":"EUVD-2023-34783","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","status":"published","published":"2023-06-23T00:00:00Z","modified":"2024-12-05T16:59:18Z","updated_at":"2026-11-03T00:04:39.661841Z"}],"ghsa":[{"id":"GHSA-v5wr-22jp-335p","title":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed...","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","status":"published","published":"2023-06-23T12:30:18Z","modified":"2023-11-09T05:01:52Z","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"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:54:56.096891Z"}],"nvd":[{"id":"CVE-2023-30362","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","status":"published","published":"2023-06-23T12:15:09.573Z","modified":"2026-06-17T05:54:33.023Z","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","assessor":"primary"}],"cwes":["CWE-125"],"updated_at":"2026-11-02T14:08:12.414559Z"}],"osv":[{"id":"CVE-2023-30362","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive 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allows attackers to obtain sensitive information via malformed pdu.(CVE-2023-30362)","status":"published","published":"2023-09-28T11:06:09Z","modified":"2026-08-18T01:17:53.887622697Z","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":"2026-11-02T15:52:40.328856Z"},{"id":"OESA-2023-1702","title":"dsoftbus security update","description":"\r\n\r\nSecurity Fix(es):\r\n\r\nBuffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.(CVE-2023-30362)","status":"published","published":"2023-09-28T11:06:09Z","modified":"2026-08-18T01:17:54.433707395Z","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":"2026-11-02T15:52:40.328856Z"},{"id":"UBUNTU-CVE-2023-30362","description":"Buffer Overflow vulnerability in coap_send function in libcoap library 4.3.1-103-g52cfd56 fixed in 4.3.1-120-ge242200 allows attackers to obtain sensitive information via malformed pdu.","status":"published","published":"2023-06-23T12:15:00Z","modified":"2026-11-09T12:49:20.434834054Z","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":"2026-11-09T13:27:42.046613Z"}]}}