CVE-2003-1230 — MEDIUM severity vulnerability (The implementation of SYN cookies (syncookies) in FreeBSD 4.)
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.
| CVE ID | CVE-2003-1230 |
|---|---|
| Severity | MEDIUM |
| CVSS score | 6.4 |
| CVSS vector | AV:N/AC:L/Au:N/C:P/I:P/A:N |
| CWE | NVD-CWE-Other |
| Status | Modified |
| Published | 2003-12-31 |
| Last modified | 2026-04-16 |
| 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. |
| Source | NIST National Vulnerability Database |
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