{"id":"CVE-2023-2829","aliases":["AZL-27305","BELL-CVE-2023-2829","EUVD-2023-34280","GHSA-jhg8-766m-r23j"],"status":"published","title":"Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","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":"cna","from":"cve"},"epss":{"day":"2026-11-08","score":0.00868,"percentile":0.58981,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2023-06-21T16:26:24Z","modified":"2026-10-26T02:30:22Z","fixes":[{"ecosystem":"Azure Linux:2","package":"bind","fixed_in":["9.16.44-1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Azure Linux:2","package":"bind","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"9.16.44-1"}]}]}],"products":[{"vendor":"isc","product":"bind"},{"vendor":"isc","product":"bind 9"},{"vendor":"netapp","product":"active_iq_unified_manager"},{"vendor":"netapp","product":"h300s_firmware"},{"vendor":"netapp","product":"h410c_firmware"},{"vendor":"netapp","product":"h410s_firmware"},{"vendor":"netapp","product":"h500s_firmware"},{"vendor":"netapp","product":"h700s_firmware"}],"references":[{"url":"https://kb.isc.org/docs/cve-2023-2829","tags":["vendor-advisory","x_transferred","Vendor Advisory","advisory"]},{"url":"https://security.netapp.com/advisory/ntap-20230703-0010/","tags":["x_transferred","Third Party Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2023-2829","tags":["web"]},{"url":"https://security.netapp.com/advisory/ntap-20230703-0010"},{"url":"https://github.com/advisories/GHSA-jhg8-766m-r23j"},{"url":"https://docs.bell-sw.com/security/cves/CVE-2023-2829","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2023-2829","title":"Malformed NSEC records can cause named to terminate unexpectedly when synth-from-dnssec is enabled","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T16:26:24.932Z","modified":"2025-02-13T16:48:38.687Z","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":"cna"}],"updated_at":"2026-11-02T14:35:23.645864Z"}],"euvd":[{"id":"EUVD-2023-34280","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T16:26:24Z","modified":"2025-02-13T16:48:38Z","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":"2026-11-03T00:03:50.947767Z"}],"ghsa":[{"id":"GHSA-jhg8-766m-r23j","title":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the...","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T18:31:08Z","modified":"2024-04-04T04:59:27Z","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":"2026-11-02T14:56:28.924331Z"}],"nvd":[{"id":"CVE-2023-2829","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T17:15:47.77Z","modified":"2026-10-24T19:10:00.127Z","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":"secondary"}],"updated_at":"2026-11-02T14:08:12.414559Z"}],"osv":[{"id":"AZL-27305","title":"CVE-2023-2829 affecting package bind for versions less than 9.16.44-1","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T17:15:47Z","modified":"2026-04-21T04:24:12.21653Z","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":"2026-11-02T15:28:03.093433Z"},{"id":"BELL-CVE-2023-2829","title":"CVE-2023-2829 does not affect BellSoft software","status":"withdrawn","published":"2023-10-18T13:45:24.314282Z","modified":"2026-01-26T09:46:58.424202Z","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":"2026-11-02T15:28:17.742221Z"},{"id":"CVE-2023-2829","description":"A `named` instance configured to run as a DNSSEC-validating recursive resolver with the Aggressive Use of DNSSEC-Validated Cache (RFC 8198) option (`synth-from-dnssec`) enabled can be remotely terminated using a zone with a malformed NSEC record.\nThis issue affects BIND 9 versions 9.16.8-S1 through 9.16.41-S1 and 9.18.11-S1 through 9.18.15-S1.","status":"published","published":"2023-06-21T17:15:47.77Z","modified":"2026-10-26T02:30:22.53495857Z","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":"2026-11-02T15:44:31.468318Z"}]}}