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CVE-2003-1230

19
FAUCET Score

CVE-2003-1230 describes a vulnerability in the SYN cookies implementation of FreeBSD versions 4.5 through 5.0-RELEASE-p3. The use of only 32-bit internal keys for syncookie generation allows remote attackers to perform brute-force ISN guessing attacks, potentially leading to traffic spoofing. With a CVSS score of 6.4, this vulnerability has a network attack vector and low attack complexity, enabling partial confidentiality and integrity impact. Despite its age, there is no known active exploitation, public exploit code (Metasploit, Nuclei, ExploitDB), or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
N/AN/A
n/aCNA affected

CVSS Data

CVSS version used by this source: 2.0

6.4MEDIUM

AV:N/AC:L/Au:N/C:P/I:P/A:N

Confidentiality Impact
PARTIAL
Integrity Impact
PARTIAL
Availability Impact
NONE
Access Vector
NETWORK
Access Complexity
LOW
Authentication
NONE
Exploitability Score
10.0
Impact Score
4.9
CvssVersion
2.0

Exploit Intelligence

EPSS Score
1.35%
Probability of exploitation in next 30 days
EPSS Percentile
68.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0135 is in the 49th percentile among its peer group of 23,723 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Remediation records are not available for this CVE.

References

secunia.com / advisories/8142
Vendor Advisory
exchange.xforce.ibmcloud.com / vulnerabilities/11397
osvdb.org / 19785
securityfocus.com / advisories/5013
PatchVendor Advisory
securityfocus.com / bid/6920
Patch