6.4
CVSSv2

CVE-2003-1230

Published: 31/12/2003 Updated: 11/07/2017
CVSS v2 Base Score: 6.4 | Impact Score: 4.9 | Exploitability Score: 10
VMScore: 570
Vector: AV:N/AC:L/Au:N/C:P/I:P/A:N

Vulnerability Summary

The implementation of SYN cookies (syncookies) in FreeBSD 4.5 up to and including 5.0-RELEASE-p3 uses only 32-bit internal keys when generating syncookies, which makes it easier for remote malicious users to conduct brute force ISN guessing attacks and spoof legitimate traffic.

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Vendor Advisories

Cisco IOS® Software contains a flaw that permits the successful prediction of TCP Initial Sequence Numbers This vulnerability is present in all released versions of Cisco IOS software running on Cisco routers and switches It only affects the security of TCP connections that originate or terminate on the affected Cisco device itself; ...