{"cve":"CVE-2008-1637","nvd":{"published":"2008-04-02T17:44:00.000","modified":"2026-06-16T22:52:08.737","status":"Modified","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.","cvss_v4":null,"cvss_v3":null,"cwes":["CWE-189"],"references":["http://doc.powerdns.com/changelog.html","http://doc.powerdns.com/powerdns-advisory-2008-01.html","http://lists.opensuse.org/opensuse-security-announce/2008-06/msg00001.html","http://secunia.com/advisories/29584","http://secunia.com/advisories/29737"],"products":["powerdns:recursor"],"source":"nvd","synced_at":"2026-10-19T19:51:11.071189229+00:00"},"epss":{"cve":"CVE-2008-1637","score":0.03964,"percentile":0.9045,"date":"2026-10-31"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}