{"id":"CVE-2006-4251","aliases":["DEBIAN-CVE-2006-4251","DSA-1211","DSA-1211-1","EUVD-2006-4239","GHSA-xh75-hw4q-gr36"],"status":"published","title":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute...","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","severity":{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.08788,"percentile":0.95209,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"published":"2006-11-14T00:00:00Z","modified":"2026-10-22T23:47:33Z","fixes":[{"ecosystem":"Debian:12","package":"pdns","fixed_in":["2.9.20-4"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns","fixed_in":["2.9.20-4"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns","fixed_in":["2.9.20-4"],"sources":["osv"]},{"ecosystem":"Debian:12","package":"pdns-recursor","fixed_in":["3.1.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["3.1.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["3.1.4-1"],"sources":["osv"]},{"ecosystem":"Debian:3.1","package":"pdns","fixed_in":["2.9.17-13sarge3"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"pdns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.20-4"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"pdns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.20-4"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"pdns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.20-4"}]}]},{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4-1"}]}]},{"source":"osv","ecosystem":"Debian:3.1","package":"pdns","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.9.17-13sarge3"}]}],"versions":["2.9.17-13","2.9.17-13sarge1","2.9.17-13sarge2"]}],"products":[{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"http://www.vupen.com/english/advisories/2006/4484","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","advisory"]},{"url":"http://www.debian.org/security/2006/dsa-1211","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/22824","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://lists.suse.com/archive/suse-security-announce/2006-Nov/0007.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/21037","tags":["vdb-entry","x_refsource_BID","x_transferred","Patch","fix"]},{"url":"http://secunia.com/advisories/22903","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://doc.powerdns.com/powerdns-advisory-2006-01.html","tags":["x_refsource_CONFIRM","x_transferred","Patch","Vendor Advisory","advisory","fix"]},{"url":"http://secunia.com/advisories/22976","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/30270","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-4251"},{"url":"https://github.com/advisories/GHSA-xh75-hw4q-gr36"},{"url":"https://security-tracker.debian.org/tracker/CVE-2006-4251","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2006-4251","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2006-11-14T19:00:00Z","modified":"2024-08-07T19:06:07.189Z","updated_at":"2026-11-02T14:33:51.085765Z"}],"euvd":[{"id":"EUVD-2006-4239","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2006-11-14T19:00:00Z","modified":"2024-08-07T19:06:07Z","updated_at":"2026-11-03T01:15:52.657645Z"}],"ghsa":[{"id":"GHSA-xh75-hw4q-gr36","title":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute...","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2022-05-01T07:16:49Z","modified":"2023-01-31T05:02:02Z","updated_at":"2026-11-02T14:48:11.03026Z"}],"nvd":[{"id":"CVE-2006-4251","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2006-11-14T19:07:00Z","modified":"2026-06-16T22:28:43.04Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"updated_at":"2026-11-02T14:01:08.546281Z"}],"osv":[{"id":"CVE-2006-4251","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2006-11-14T19:07:00Z","modified":"2026-04-10T03:37:42.347751Z","updated_at":"2026-11-02T15:43:56.865964Z"},{"id":"DEBIAN-CVE-2006-4251","description":"Buffer overflow in PowerDNS Recursor 3.1.3 and earlier might allow remote attackers to execute arbitrary code via a malformed TCP DNS query that prevents Recursor from properly calculating the TCP DNS query length.","status":"published","published":"2006-11-14T19:07:00Z","modified":"2026-10-22T23:47:33.841979391Z","updated_at":"2026-11-02T15:45:23.105674Z"},{"id":"DSA-1211","title":"pdns","status":"withdrawn","published":"2006-11-14T00:00:00Z","modified":"2025-05-26T07:15:10.532936Z","updated_at":"2026-11-02T15:46:14.285228Z"},{"id":"DSA-1211-1","title":"pdns","status":"published","published":"2006-11-14T00:00:00Z","modified":"2026-03-09T01:01:49.753544Z","updated_at":"2026-11-02T15:46:14.285228Z"}]}}