{"id":"CVE-2017-15120","aliases":["DEBIAN-CVE-2017-15120","DSA-4063-1","EUVD-2017-6581","GHSA-rxpc-3cmh-w743","UBUNTU-CVE-2017-15120"],"status":"published","title":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8...","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","severity":{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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":0.51353,"percentile":0.98947,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":true,"fix_available":true},"cwes":["CWE-476"],"published":"2017-12-11T00:00:00Z","modified":"2026-10-24T10:30:21Z","exploits":[{"source":"pocgithub","id":"shutingrz/CVE-2017-15120_PoC","title":"shutingrz/CVE-2017-15120_PoC","date":"2018-10-16","url":"https://github.com/shutingrz/CVE-2017-15120_PoC"}],"fixes":[{"ecosystem":"Debian:12","package":"pdns-recursor","fixed_in":["4.1.0-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["4.1.0-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["4.1.0-1"],"sources":["osv"]},{"ecosystem":"Debian:9","package":"pdns-recursor","fixed_in":["4.0.4-1+deb9u3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.1.0-1"}]}]},{"source":"osv","ecosystem":"Debian:9","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"4.0.4-1+deb9u3"}]}],"versions":["4.0.4-1","4.0.4-1+deb9u1","4.0.4-1+deb9u2","4.0.4-1+deb9u3~bpo8+1"]},{"source":"osv","ecosystem":"Ubuntu:Pro:16.04:LTS","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["3.7.3-1","4.0.0~alpha1-1","4.0.0~alpha1-2","4.0.0~alpha2-2","4.0.0~alpha2-2ubuntu0.1","4.0.0~alpha2-2ubuntu0.1+esm1"]}],"products":[{"vendor":"debian","product":"debian_linux"},{"vendor":"power dns","product":"pdns-recursor"},{"vendor":"powerdns","product":"pdns-recursor"},{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-15120","tags":["x_refsource_CONFIRM","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://doc.powerdns.com/recursor/security-advisories/powerdns-advisory-2017-08.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","fix","report"]},{"url":"https://www.debian.org/security/2017/dsa-4063","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","Third Party Advisory","advisory"]},{"url":"http://seclists.org/oss-sec/2017/q4/382","tags":["mailing-list","x_refsource_MLIST","x_transferred","Mailing List","Patch","Third Party Advisory","fix"]},{"url":"http://www.securityfocus.com/bid/106335","tags":["vdb-entry","x_refsource_BID","x_transferred","Third Party Advisory","VDB Entry","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-15120"},{"url":"https://github.com/advisories/GHSA-rxpc-3cmh-w743"},{"url":"https://security-tracker.debian.org/tracker/CVE-2017-15120","tags":["advisory"]},{"url":"https://ubuntu.com/security/CVE-2017-15120","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2017-15120","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2017-15120","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:00:00Z","modified":"2024-08-05T19:50:16.333Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:33:14.556599Z"}],"euvd":[{"id":"EUVD-2017-6581","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:00:00Z","modified":"2024-08-05T19:50:16Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-03T02:23:14.849102Z"}],"ghsa":[{"id":"GHSA-rxpc-3cmh-w743","title":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8...","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2022-05-13T01:37:33Z","modified":"2023-02-01T05:08:45Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"cwes":["CWE-476"],"updated_at":"2026-11-02T14:50:51.059157Z"}],"nvd":[{"id":"CVE-2017-15120","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:29:00.343Z","modified":"2026-06-17T01:07:17.097Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"secondary"},{"version":"3.0","score":7.5,"vector":"CVSS:3.0/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-476"],"updated_at":"2026-11-02T14:04:18.679411Z"}],"osv":[{"id":"CVE-2017-15120","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:29:00.343Z","modified":"2026-10-24T10:30:21.00838302Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:44:04.572713Z"},{"id":"DEBIAN-CVE-2017-15120","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:29:00.343Z","modified":"2026-09-01T20:03:44.413232813Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:45:28.801885Z"},{"id":"UBUNTU-CVE-2017-15120","description":"An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.","status":"published","published":"2018-07-27T15:29:00Z","modified":"2025-09-08T16:44:27Z","cvss":[{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"},{"version":"3.0","score":7.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high"}],"updated_at":"2026-11-02T15:54:14.563448Z"},{"id":"DSA-4063-1","title":"pdns-recursor - security update","status":"published","published":"2017-12-11T00:00:00Z","modified":"2026-03-09T01:23:23.064931Z","updated_at":"2026-11-02T15:46:16.523846Z"}]}}