CVE-2002-0518 json
The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of servi…
published 2002-06-11 24 y ago modified 2026-06-16 4 mo ago also EUVD-2002-0514
- cvss
- 5.0
- version 2.0, NVD
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 2.5%
- EPSS 2.5% chance of exploitation in 30 days, percentile 84%
- public exploits
- 0
- none known
Summary
The SYN cache (syncache) and SYN cookie (syncookie) mechanism in FreeBSD 4.5 and earlier allows remote attackers to cause a denial of service (crash) (1) via a SYN packet that is accepted using syncookies that causes a null pointer to be referenced for the socket's TCP options, or (2) by killing and restarting a process that listens on the same socket, which does not properly clear the old inpcb pointer on restart.
Patch / fix
- iss.net/security_center/static/8875.php advisory
- securityfocus.com/bid/4524 advisory
Exploit prediction
2.47% chance of exploitation in the next 30 days, higher than 84% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| NVD | 2.0 | 5.0 | AV:N/AC:L/Au:N/C:N/I:N/A:P |
References
-
iss.net
/security_center/static/8875.php
vdb-entry, patch, vendor-advisory
-
securityfocus.com
/bid/4524
vdb-entry, patch, vendor-advisory
-
osvdb.org
/6046
vdb-entry
-
iss.net
/security_center/static/8873.php
vdb-entry
Sources
- CVE List CVE-2002-0518
- NVD CVE-2002-0518
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