{"cve":"CVE-2003-1230","nvd":{"published":"2003-12-31T05:00:00.000","modified":"2026-06-16T22:03:45.727","status":"Modified","description":"The implementation of SYN cookies (syncookies) in FreeBSD 4.5 through 5.0-RELEASE-p3 uses only 32-bit internal keys when generating syncookies, which makes it easier for remote attackers to conduct brute force ISN guessing attacks and spoof legitimate traffic.","cvss_v4":null,"cvss_v3":null,"cwes":[],"references":["http://secunia.com/advisories/8142/","http://www.osvdb.org/19785","http://www.securityfocus.com/advisories/5013","http://www.securityfocus.com/bid/6920","https://exchange.xforce.ibmcloud.com/vulnerabilities/11397"],"products":[],"source":"nvd","synced_at":"2026-10-19T19:35:54.859949650+00:00"},"epss":{"cve":"CVE-2003-1230","score":0.01351,"percentile":0.71529,"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."]}