CVE-2003-1230

high

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.

References

https://exchange.xforce.ibmcloud.com/vulnerabilities/11397

http://www.securityfocus.com/bid/6920

http://www.securityfocus.com/advisories/5013

http://www.osvdb.org/19785

http://secunia.com/advisories/8142/

Details

Source: Mitre, NVD

Published: 2003-12-31

Updated: 2026-06-16

Risk Information

CVSS v2

Base Score: 6.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:N

Severity: Medium

CVSS v3

Base Score: 7.5

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Severity: High

EPSS

EPSS: 0.00524