{"id":"CVE-2021-33056","aliases":["EUVD-2021-19771","GHSA-jw78-2435-w3r6","UBUNTU-CVE-2021-33056"],"status":"published","title":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an...","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01294,"percentile":0.70688,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-444"],"published":"2021-08-12T20:54:37Z","modified":"2026-10-20T14:09:45Z","affected":[{"source":"osv","ecosystem":"Ubuntu:16.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1","1.4.1-1.1"]},{"source":"osv","ecosystem":"Ubuntu:18.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.4.1-1.1","1.6.3-2"]},{"source":"osv","ecosystem":"Ubuntu:20.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.6.3-5"]},{"source":"osv","ecosystem":"Ubuntu:22.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["4.4.21+dfsg-1"]},{"source":"osv","ecosystem":"Ubuntu:24.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.2.0+dfsg-3","5.2.0+dfsg-3.1build1","5.2.0+dfsg-3.1build2","5.2.0+dfsg-3.1build3"]},{"source":"osv","ecosystem":"Ubuntu:25.10","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.105+dfsg-4"]},{"source":"osv","ecosystem":"Ubuntu:26.10","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.105+dfsg-4.1"]},{"source":"osv","ecosystem":"Ubuntu:26.04:LTS","package":"belle-sip","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["5.3.105+dfsg-4","5.3.105+dfsg-4.1"]}],"products":[{"vendor":"linphone","product":"belle-sip"}],"references":[{"url":"https://github.com/BelledonneCommunications/belle-sip/commit/116e3eb48fe43ea63eb9f3c4b4b30c48d58d6ff0","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://github.com/BelledonneCommunications/belle-sip/compare/4.5.15...4.5.20","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","fix","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-33056"},{"url":"https://github.com/advisories/GHSA-jw78-2435-w3r6"},{"url":"https://ubuntu.com/security/CVE-2021-33056","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2021-33056","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2021-33056","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2021-08-12T20:54:37Z","modified":"2024-08-03T23:42:19.652Z","updated_at":"2026-11-02T14:33:10.555814Z"}],"euvd":[{"id":"EUVD-2021-19771","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2021-08-12T20:54:37Z","modified":"2024-08-03T23:42:19Z","updated_at":"2026-11-03T03:24:35.30045Z"}],"ghsa":[{"id":"GHSA-jw78-2435-w3r6","title":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an...","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2022-05-24T19:10:48Z","modified":"2022-05-24T19:10:50Z","cwes":["CWE-444"],"updated_at":"2026-11-02T14:41:42.013329Z"}],"nvd":[{"id":"CVE-2021-33056","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2021-08-12T21:15:07.457Z","modified":"2026-06-17T03:54:04.58Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:N/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-444"],"updated_at":"2026-11-02T14:06:56.943671Z"}],"osv":[{"id":"CVE-2021-33056","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2021-08-12T21:15:07.457Z","modified":"2026-10-20T14:09:45.397454694Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:19.793849Z"},{"id":"UBUNTU-CVE-2021-33056","description":"Belledonne Belle-sip before 4.5.20, as used in Linphone and other products, can crash via an invalid From header in a SIP message.","status":"published","published":"2021-08-12T21:15:00Z","modified":"2026-10-17T12:55:46.724876961Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:27.332852Z"}]}}