{"id":"CVE-2008-1637","aliases":["DEBIAN-CVE-2008-1637","DSA-1544-1","DSA-1544-2","EUVD-2008-1638","GHSA-c5qh-3289-h9w4"],"status":"published","title":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2)...","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","severity":{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.03964,"percentile":0.90522,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-189"],"published":"2008-04-02T17:00:00Z","modified":"2026-10-23T17:47:37Z","fixes":[{"ecosystem":"Debian:12","package":"pdns-recursor","fixed_in":["3.1.7-1"],"sources":["osv"]},{"ecosystem":"Debian:13","package":"pdns-recursor","fixed_in":["3.1.7-1"],"sources":["osv"]},{"ecosystem":"Debian:14","package":"pdns-recursor","fixed_in":["3.1.7-1"],"sources":["osv"]},{"ecosystem":"Debian:4.0","package":"pdns-recursor","fixed_in":["3.1.4-1+etch1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Debian:12","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.7-1"}]}]},{"source":"osv","ecosystem":"Debian:13","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.7-1"}]}]},{"source":"osv","ecosystem":"Debian:14","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.7-1"}]}]},{"source":"osv","ecosystem":"Debian:4.0","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4-1+etch1"}]}],"versions":["3.1.4-1"]},{"source":"osv","ecosystem":"Debian:4.0","package":"pdns-recursor","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"3.1.4-1+etch2"}]}],"versions":["3.1.4-1","3.1.4-1+etch1"],"bundled":2}],"products":[{"vendor":"powerdns","product":"recursor"}],"references":[{"url":"http://secunia.com/advisories/29764","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://secunia.com/advisories/29737","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://www.debian.org/security/2008/dsa-1544","tags":["vendor-advisory","x_refsource_DEBIAN","x_transferred","advisory"]},{"url":"https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00198.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://www.securityfocus.com/bid/28517","tags":["vdb-entry","x_refsource_BID","x_transferred","web"]},{"url":"http://doc.powerdns.com/changelog.html","tags":["x_refsource_CONFIRM","x_transferred","web"]},{"url":"http://www.trusteer.com/docs/powerdnsrecursor.html","tags":["x_refsource_MISC","x_transferred","Exploit","evidence"]},{"url":"http://secunia.com/advisories/29584","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","Exploit","Vendor Advisory","advisory","evidence"]},{"url":"http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00001.html","tags":["vendor-advisory","x_refsource_SUSE","x_transferred","web"]},{"url":"http://www.vupen.com/english/advisories/2008/1046/references","tags":["vdb-entry","x_refsource_VUPEN","x_transferred","advisory"]},{"url":"http://www.trusteer.com/docs/PowerDNS_recursor_DNS_Cache_Poisoning.pdf","tags":["x_refsource_MISC","x_transferred","Exploit","evidence"]},{"url":"http://secunia.com/advisories/29830","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"http://doc.powerdns.com/powerdns-advisory-2008-01.html","tags":["x_refsource_CONFIRM","x_transferred","Exploit","Patch","evidence","fix"]},{"url":"https://exchange.xforce.ibmcloud.com/vulnerabilities/41534","tags":["vdb-entry","x_refsource_XF","x_transferred","web"]},{"url":"http://security.gentoo.org/glsa/glsa-200804-22.xml","tags":["vendor-advisory","x_refsource_GENTOO","x_transferred","advisory"]},{"url":"https://www.redhat.com/archives/fedora-package-announce/2008-April/msg00224.html","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"http://www.securityfocus.com/archive/1/490330/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred","web"]},{"url":"http://secunia.com/advisories/30581","tags":["third-party-advisory","x_refsource_SECUNIA","x_transferred","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2008-1637"},{"url":"https://github.com/advisories/GHSA-c5qh-3289-h9w4"},{"url":"https://security-tracker.debian.org/tracker/CVE-2008-1637","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2008-1637","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2008-04-02T17:00:00Z","modified":"2024-08-07T08:32:01.076Z","updated_at":"2026-11-02T14:34:47.71012Z"}],"euvd":[{"id":"EUVD-2008-1638","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2008-04-02T17:00:00Z","modified":"2024-08-07T08:32:01Z","updated_at":"2026-11-03T01:39:00.729717Z"}],"ghsa":[{"id":"GHSA-c5qh-3289-h9w4","title":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2)...","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2022-05-01T23:42:02Z","modified":"2023-01-31T05:06:31Z","updated_at":"2026-11-02T14:49:02.515371Z"}],"nvd":[{"id":"CVE-2008-1637","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2008-04-02T17:44:00Z","modified":"2026-06-16T22:52:08.737Z","cvss":[{"version":"2.0","score":6.8,"vector":"AV:N/AC:M/Au:N/C:P/I:P/A:P","level":"medium","assessor":"primary"}],"cwes":["CWE-189"],"updated_at":"2026-11-02T14:01:25.857543Z"}],"osv":[{"id":"CVE-2008-1637","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2008-04-02T17:44:00Z","modified":"2026-04-10T03:39:45.618297Z","updated_at":"2026-11-02T15:43:57.178433Z"},{"id":"DEBIAN-CVE-2008-1637","description":"PowerDNS Recursor before 3.1.5 uses insufficient randomness to calculate (1) TRXID values and (2) UDP source port numbers, which makes it easier for remote attackers to poison a DNS cache, related to (a) algorithmic deficiencies in rand and random functions in external libraries, (b) use of a 32-bit seed value, and (c) choice of the time of day as the sole seeding information.","status":"published","published":"2008-04-02T17:44:00Z","modified":"2026-10-23T17:47:37.894800966Z","updated_at":"2026-11-02T15:45:23.742363Z"},{"id":"DSA-1544-1","title":"pdns-recursor - cache poisoning vulnerability","status":"published","published":"2008-04-09T00:00:00Z","modified":"2026-03-09T01:18:14.032482Z","updated_at":"2026-11-02T15:46:14.734124Z"},{"id":"DSA-1544-2","title":"pdns-recursor - predictable randomness","status":"published","published":"2008-07-16T00:00:00Z","modified":"2026-03-09T01:01:50.381106Z","updated_at":"2026-11-02T15:46:14.734124Z"}]}}