VULNERABILITY INTELLIGENCE

CVE-2003-1230

CVSS score6.4 MEDIUM
EPSS probability1.35%
CISA KEVNot currently listed
Published2003-12-31
Last modified2026-06-16
CVSS vectorAV:N/AC:L/Au:N/C:P/I:P/A:N

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.

Primary references