CVE-2003-1230

Name: CVE-2003-1230
Creator: NVD / NIST
Published: 2003-12-31T05:00:00+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 1.35%

Last modified Jun 16, 2026

CVE-2003-1230 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 1.35% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability

1.35%

68.0th percentile

Probability of exploitation in the next 30 days. Learn more

References

http://secunia.com/advisories/8142/Vendor Advisory
http://www.osvdb.org/19785
http://www.securityfocus.com/advisories/5013Patch, Vendor Advisory
http://www.securityfocus.com/bid/6920Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/11397
http://secunia.com/advisories/8142/Vendor Advisory
http://www.osvdb.org/19785
http://www.securityfocus.com/advisories/5013Patch, Vendor Advisory
http://www.securityfocus.com/bid/6920Patch
https://exchange.xforce.ibmcloud.com/vulnerabilities/11397

Timeline

Published: Dec 31, 2003
Last Modified: Jun 16, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2003-1230?

How severe is CVE-2003-1230?

Severity scoring for CVE-2003-1230 is pending analysis. The EPSS model estimates a 1.35% probability of exploitation in the next 30 days.

How do I fix CVE-2003-1230?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2003-1230?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST