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Vulnerability record · CVE-2002-0666 · published 4 November 2002

CVE-2002-0666: Frees wan vulnerability

FFrees Wan · Frees Wan

IPSEC implementations including (1) FreeS/WAN and (2) KAME do not properly calculate the length of authentication data, which allows remote attackers to cause a denial of service (kernel panic) via spoofed, short Encapsulating Security Payload (ESP) packets, which result in integer signedness errors.

5.0 CVSS 2.0 Medium EPSS 2.5% · top 16.1%
5.0CVSS 2.0 base score
2.5%EPSS exploitation probability, 30 days
NoNot in CISA KEV
12Affected product versions listed by NVD
12References
16 Jun 2026Last modified by NVD

Description

IPSEC implementations including (1) FreeS/WAN and (2) KAME do not properly calculate the length of authentication data, which allows remote attackers to cause a denial of service (kernel panic) via spoofed, short Encapsulating Security Payload (ESP) packets, which result in integer signedness errors.

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

Affected products

12 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2002-016.txt.asc
http://razor.bindview.com/publish/advisories/adv_ipsec.html Vendor Advisory
http://www.debian.org/security/2002/dsa-201
http://www.iss.net/security_center/static/10411.php Vendor Advisory
http://www.kb.cert.org/vuls/id/459371 Third Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/6011
ftp://ftp.netbsd.org/pub/NetBSD/security/advisories/NetBSD-SA2002-016.txt.asc
http://razor.bindview.com/publish/advisories/adv_ipsec.html Vendor Advisory
http://www.debian.org/security/2002/dsa-201
http://www.iss.net/security_center/static/10411.php Vendor Advisory
http://www.kb.cert.org/vuls/id/459371 Third Party AdvisoryUS Government Resource
http://www.securityfocus.com/bid/6011

Track CVE-2002-0666 inside VULONE

Watch it alongside the ransomware crews, C2 infrastructure and forum chatter that reference it, query it through the API and pull it into your SIEM over TAXII.

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2002-0666), CISA KEV, FIRST EPSS (scores of 2026-09-29). This page is refreshed as NVD updates the record.