The implementation of SYN cookies (syncookies) in FreeBSD 4.5 through 5.0-RELEASE-p3 uses…
Priority LOW 31Published · Updated
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- — Not recorded in CVSS 2.0
- Attack complexity
- Low
- Impact type
- —
- Confidentiality · integrity · availability
- Partial · Partial · None
- Fix status
- No fix listed
Attack profile from CVSS 2.0 · NVD. Fix status from CNA.
Summary
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.
Why it matters now
EPSS 0.01351 71st percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | — | all versions | — | No fix listed | CNA |
- — Vendor— Affected all versions Fixed in — No fix listed CNA
CPE configurations NVD · 5
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:o:freebsd:freebsd:4.5:release:*:*:*:*:*:* | 4.5 release | Running on | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.6:release:*:*:*:*:*:* | 4.6 release | Running on | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.7:release:*:*:*:*:*:* | 4.7 release | Running on | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:4.7:stable:*:*:*:*:*:* | 4.7 stable | Running on | FreeBSD |
| cpe:2.3:o:freebsd:freebsd:5.0:release:*:*:*:*:*:* | 5.0 release | Running on | FreeBSD |
- cpe:2.3:o:freebsd:freebsd:4.5:release:*:*:*:*:*:* Versions 4.5 release Running on ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.6:release:*:*:*:*:*:* Versions 4.6 release Running on ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.7:release:*:*:*:*:*:* Versions 4.7 release Running on ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:4.7:stable:*:*:*:*:*:* Versions 4.7 stable Running on ·FreeBSD
- cpe:2.3:o:freebsd:freebsd:5.0:release:*:*:*:*:*:* Versions 5.0 release Running on ·FreeBSD
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2003-1230
- 2026-10-03 Alias added: GHSA-7hx3-c6gv-rvgg
References
Other 1
Sources
- CVE-2003-1230 · CVE Program
- CVE-2003-1230 · NVD
- FIRST EPSS
- GHSA-7hx3-c6gv-rvgg · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences