{"id":"CVE-2009-3602","aliases":["DEBIAN-CVE-2009-3602","DSA-1963-1","EUVD-2009-3583","GHSA-3xrf-3v7w-582w"],"status":"published","title":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote...","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","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":"2026-11-09","score":0.02976,"percentile":0.87362,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-310"],"published":"2009-10-13T10:00:00Z","modified":"2026-10-23T17:47:31Z","fixes":[{"ecosystem":"Debian:12","package":"unbound","fixed_in":["1.3.4-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"unbound","fixed_in":["1.3.4-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"unbound","fixed_in":["1.3.4-1"],"sources":["osv"]},{"ecosystem":"Debian:5.0","package":"unbound","fixed_in":["1.0.2-1+lenny1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"unbound","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.4-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"unbound","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.4-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"unbound","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.3.4-1"}]}]},{"source":"osv","ecosystem":"Debian:5.0","package":"unbound","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.0.2-1+lenny1"}]}],"versions":["1.0.2-1"]}],"products":[{"vendor":"nlnetlabs","product":"unbound"}],"references":[{"url":"http://secunia.com/advisories/37913","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.openwall.com/lists/oss-security/2009/10/09/3","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://secunia.com/advisories/36996","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Vendor Advisory","advisory"]},{"url":"http://unbound.net/pipermail/unbound-users/2009-October/000852.html","tags":["mailing-list","x_refsource_MLIST","x_transferred","Vendor Advisory","advisory"]},{"url":"http://www.vupen.com/english/advisories/2009/2875","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","Vendor Advisory","advisory"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/53729","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://www.openwall.com/lists/oss-security/2009/10/09/2","tags":["mailing-list","x_refsource_MLIST","x_transferred","web"]},{"url":"http://osvdb.org/58836","tags":["vdb-entry","x_refsource_OSVDB","x_transferred","web"]},{"url":"http://www.debian.org/security/2009/dsa-1963","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2009-3602"},{"url":"https://github.com/advisories/GHSA-3xrf-3v7w-582w"},{"url":"https://security-tracker.debian.org/tracker/CVE-2009-3602","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2009-3602","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2009-10-13T10:00:00Z","modified":"2024-08-07T06:31:10.455Z","updated_at":"2026-11-02T14:33:23.749891Z"}],"euvd":[{"id":"EUVD-2009-3583","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2009-10-13T10:00:00Z","modified":"2024-08-07T06:31:10Z","updated_at":"2026-11-03T01:39:13.262818Z"}],"ghsa":[{"id":"GHSA-3xrf-3v7w-582w","title":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote...","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2022-05-02T03:46:50Z","modified":"2023-01-31T05:08:22Z","updated_at":"2026-11-02T14:49:23.285558Z"}],"nvd":[{"id":"CVE-2009-3602","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2009-10-13T10:30:00.657Z","modified":"2026-06-16T23:11:59.27Z","cvss":[{"version":"2.0","score":7.5,"vector":"AV:N/AC:L/Au:N/C:P/I:P/A:P","level":"high","assessor":"primary"}],"cwes":["CWE-310"],"updated_at":"2026-11-02T14:01:37.004244Z"}],"osv":[{"id":"CVE-2009-3602","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2009-10-13T10:30:00Z","modified":"2026-04-10T03:40:57.291941Z","updated_at":"2026-11-02T15:43:57.714116Z"},{"id":"DEBIAN-CVE-2009-3602","description":"Unbound before 1.3.4 does not properly verify signatures for NSEC3 records, which allows remote attackers to cause secure delegations to be downgraded via DNS spoofing or other DNS-related attacks in conjunction with crafted delegation responses.","status":"published","published":"2009-10-13T10:30:00.657Z","modified":"2026-10-23T17:47:31.422542067Z","updated_at":"2026-11-02T15:45:24.013654Z"},{"id":"DSA-1963-1","title":"unbound - DNSSEC validation","status":"published","published":"2009-12-23T00:00:00Z","modified":"2026-03-09T01:22:27.222591Z","updated_at":"2026-11-02T15:46:15.108335Z"}]}}