CVE-2002-0666

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.

Published: 2002-11-04 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2002-0666 is rated Moderate Risk (45/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.74%). Review affected assets and schedule remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2002-0666

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2025-08-01 0.97% 0.74% -0.23%
2 2025-03-30 1.80% 0.97% -0.83%
3 2025-03-29 — 1.80% —

Full EPSS history (8 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2002-0666

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:N/I:N/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:P)
Partial availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2002-0666

Affected software / configurations for CVE-2002-0666

Vendor Product Version Raw CPE
frees_wan frees_wan 1.9 cpe:2.3:a:frees_wan:frees_wan:1.9:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.1 cpe:2.3:a:frees_wan:frees_wan:1.9.1:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.2 cpe:2.3:a:frees_wan:frees_wan:1.9.2:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.3 cpe:2.3:a:frees_wan:frees_wan:1.9.3:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.4 cpe:2.3:a:frees_wan:frees_wan:1.9.4:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.5 cpe:2.3:a:frees_wan:frees_wan:1.9.5:*:*:*:*:*:*:*
frees_wan frees_wan 1.9.6 cpe:2.3:a:frees_wan:frees_wan:1.9.6:*:*:*:*:*:*:*
apple mac_os_x 10.2 cpe:2.3:o:apple:mac_os_x:10.2:*:*:*:*:*:*:*
apple mac_os_x_server 10.2 cpe:2.3:o:apple:mac_os_x_server:10.2:*:*:*:*:*:*:*
freebsd freebsd 4.6 cpe:2.3:o:freebsd:freebsd:4.6:*:*:*:*:*:*:*
freebsd freebsd 4.6 cpe:2.3:o:freebsd:freebsd:4.6:release:*:*:*:*:*:*
freebsd freebsd 4.6 cpe:2.3:o:freebsd:freebsd:4.6:stable:*:*:*:*:*:*
netbsd netbsd 1.5 cpe:2.3:o:netbsd:netbsd:1.5:*:*:*:*:*:*:*
netbsd netbsd 1.5 cpe:2.3:o:netbsd:netbsd:1.5:*:sh3:*:*:*:*:*
netbsd netbsd 1.5 cpe:2.3:o:netbsd:netbsd:1.5:*:x86:*:*:*:*:*
netbsd netbsd 1.5.1 cpe:2.3:o:netbsd:netbsd:1.5.1:*:*:*:*:*:*:*
netbsd netbsd 1.5.2 cpe:2.3:o:netbsd:netbsd:1.5.2:*:*:*:*:*:*:*
netbsd netbsd 1.5.3 cpe:2.3:o:netbsd:netbsd:1.5.3:*:*:*:*:*:*:*
netbsd netbsd 1.6 cpe:2.3:o:netbsd:netbsd:1.6:beta:*:*:*:*:*:*
global_technology_associates gnat_box_firmware 3.1 cpe:2.3:h:global_technology_associates:gnat_box_firmware:3.1:*:*:*:*:*:*:*
global_technology_associates gnat_box_firmware 3.2 cpe:2.3:h:global_technology_associates:gnat_box_firmware:3.2:*:*:*:*:*:*:*
global_technology_associates gnat_box_firmware 3.3 cpe:2.3:h:global_technology_associates:gnat_box_firmware:3.3:*:*:*:*:*:*:*
nec bluefire_ix1035_router — cpe:2.3:h:nec:bluefire_ix1035_router:*:*:*:*:*:*:*:*
nec ix1010 — cpe:2.3:h:nec:ix1010:*:*:*:*:*:*:*:*
nec ix1011 — cpe:2.3:h:nec:ix1011:*:*:*:*:*:*:*:*
nec ix1020 — cpe:2.3:h:nec:ix1020:*:*:*:*:*:*:*:*
nec ix1050 — cpe:2.3:h:nec:ix1050:*:*:*:*:*:*:*:*
nec ix2010 — cpe:2.3:h:nec:ix2010:*:*:*:*:*:*:*:*

References for CVE-2002-0666

cvelogic Threat Intelligence