{"id":"CVE-2020-35471","aliases":["BIT-envoy-2020-35471","EUVD-2020-23143","GHSA-vc66-g998-2h5p","openSUSE-SU-2022:0065-1"],"status":"published","title":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation...","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","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":"2026-11-10","score":0.02393,"percentile":0.84116,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2020-12-15T00:48:24Z","modified":"2026-10-20T13:59:38Z","fixes":[{"ecosystem":"Bitnami","package":"envoy","fixed_in":["1.16.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.16.1"}]}]},{"source":"osv","ecosystem":"SUSE:Package Hub 15 SP3","package":"envoy-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.6-bp153.3.4.1"}]}],"bundled":5},{"source":"osv","ecosystem":"openSUSE:Leap 15.3","package":"envoy-proxy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.14.6-bp153.3.4.1"}]}],"bundled":5}],"products":[{"vendor":"envoyproxy","product":"envoy"}],"references":[{"url":"https://github.com/envoyproxy/envoy/compare/v1.16.0...v1.16.1","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/envoyproxy/envoy/issues/14113","tags":["x_refsource_MISC","x_transferred","Exploit","Third Party Advisory","advisory","evidence"]},{"url":"https://github.com/envoyproxy/envoy/pull/14122","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-35471","tags":["web"]},{"url":"https://github.com/advisories/GHSA-vc66-g998-2h5p"},{"url":"https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/WUFXLLYPEPLGLE3CNOENBUDET76YJXPI/","tags":["advisory"]},{"url":"https://bugzilla.suse.com/1167073","tags":["report"]},{"url":"https://bugzilla.suse.com/1173559","tags":["report"]},{"url":"https://bugzilla.suse.com/1180121","tags":["report"]},{"url":"https://www.suse.com/security/cve/CVE-2020-12603","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-12604","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-12605","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-35471","tags":["web"]},{"url":"https://www.suse.com/security/cve/CVE-2020-8663","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2020-35471","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2020-12-15T00:48:24Z","modified":"2024-08-04T17:02:07.948Z","updated_at":"2026-11-02T14:35:57.975444Z"}],"euvd":[{"id":"EUVD-2020-23143","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2020-12-15T00:48:24Z","modified":"2024-08-04T17:02:07Z","updated_at":"2026-11-03T03:07:06.389211Z"}],"ghsa":[{"id":"GHSA-vc66-g998-2h5p","title":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation...","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2022-05-24T17:36:36Z","modified":"2023-01-29T05:05:03Z","updated_at":"2026-11-02T14:45:42.123832Z"}],"nvd":[{"id":"CVE-2020-35471","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2020-12-15T01:15:13.87Z","modified":"2026-06-17T03:13:46.09Z","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"}],"updated_at":"2026-11-02T14:06:27.73474Z"}],"osv":[{"id":"CVE-2020-35471","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2020-12-15T01:15:13.87Z","modified":"2026-10-20T13:59:38.49909984Z","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":"2026-11-02T15:44:16.612899Z"},{"id":"BIT-envoy-2020-35471","description":"Envoy before 1.16.1 mishandles dropped and truncated datagrams, as demonstrated by a segmentation fault for a UDP packet size larger than 1500.","status":"published","published":"2024-03-06T10:59:56.472Z","modified":"2026-09-08T08:47:23.776419084Z","updated_at":"2026-11-02T15:28:29.563843Z"},{"id":"openSUSE-SU-2022:0065-1","title":"Security update for envoy-proxy","description":"This update for envoy-proxy fixes the following issues:\n\nUpdate to 1.14.6:\n\n- CVE-2020-35471: Fixed a denial of service via dropped and truncated UDP datagrams (boo#1180121).\n","status":"published","published":"2022-03-02T16:51:20Z","modified":"2026-02-04T04:08:22.828372Z","updated_at":"2026-11-02T16:58:32.653274Z"}]}}