CVE-1999-0001

ip_input.c in BSD-derived TCP/IP implementations allows remote attackers to cause a denial of service (crash or hang) via crafted packets.

Published: 1999-12-30 Last update: 2026-04-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-1999-0001 is rated Moderate Risk (46.8/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 0.99%). 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-1999-0001

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 2026-05-23 1.19% 0.99% -0.20%
2 2026-04-23 1.49% 1.19% -0.30%
3 2026-04-20 — 1.49% —

Full EPSS history (22 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-1999-0001

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-1999-0001

OS Trackers for CVE-1999-0001

vendor priority summary link
alpine — CVE-1999-0001: no source package rows; 0 state rows across 0 repos (none); fixed 0, open 0. https://security.alpinelinux.org/vuln/CVE-1999-0001

Affected software / configurations for CVE-1999-0001

Vendor Product Version Raw CPE
bsdi bsd_os 3.1 cpe:2.3:o:bsdi:bsd_os:3.1:*:*:*:*:*:*:*
freebsd freebsd 1.0 cpe:2.3:o:freebsd:freebsd:1.0:*:*:*:*:*:*:*
freebsd freebsd 1.1 cpe:2.3:o:freebsd:freebsd:1.1:*:*:*:*:*:*:*
freebsd freebsd 1.1.5.1 cpe:2.3:o:freebsd:freebsd:1.1.5.1:*:*:*:*:*:*:*
freebsd freebsd 1.2 cpe:2.3:o:freebsd:freebsd:1.2:*:*:*:*:*:*:*
freebsd freebsd 2.0 cpe:2.3:o:freebsd:freebsd:2.0:*:*:*:*:*:*:*
freebsd freebsd 2.0.1 cpe:2.3:o:freebsd:freebsd:2.0.1:*:*:*:*:*:*:*
freebsd freebsd 2.0.5 cpe:2.3:o:freebsd:freebsd:2.0.5:*:*:*:*:*:*:*
freebsd freebsd 2.1.5 cpe:2.3:o:freebsd:freebsd:2.1.5:*:*:*:*:*:*:*
freebsd freebsd 2.1.6 cpe:2.3:o:freebsd:freebsd:2.1.6:*:*:*:*:*:*:*
freebsd freebsd 2.1.6.1 cpe:2.3:o:freebsd:freebsd:2.1.6.1:*:*:*:*:*:*:*
freebsd freebsd 2.1.7 cpe:2.3:o:freebsd:freebsd:2.1.7:*:*:*:*:*:*:*
freebsd freebsd 2.1.7.1 cpe:2.3:o:freebsd:freebsd:2.1.7.1:*:*:*:*:*:*:*
freebsd freebsd 2.2 cpe:2.3:o:freebsd:freebsd:2.2:*:*:*:*:*:*:*
freebsd freebsd 2.2.2 cpe:2.3:o:freebsd:freebsd:2.2.2:*:*:*:*:*:*:*
freebsd freebsd 2.2.3 cpe:2.3:o:freebsd:freebsd:2.2.3:*:*:*:*:*:*:*
freebsd freebsd 2.2.4 cpe:2.3:o:freebsd:freebsd:2.2.4:*:*:*:*:*:*:*
freebsd freebsd 2.2.5 cpe:2.3:o:freebsd:freebsd:2.2.5:*:*:*:*:*:*:*
freebsd freebsd 2.2.6 cpe:2.3:o:freebsd:freebsd:2.2.6:*:*:*:*:*:*:*
freebsd freebsd 2.2.8 cpe:2.3:o:freebsd:freebsd:2.2.8:*:*:*:*:*:*:*
freebsd freebsd 3.0 cpe:2.3:o:freebsd:freebsd:3.0:*:*:*:*:*:*:*
openbsd openbsd 2.3 cpe:2.3:o:openbsd:openbsd:2.3:*:*:*:*:*:*:*
openbsd openbsd 2.4 cpe:2.3:o:openbsd:openbsd:2.4:*:*:*:*:*:*:*

References for CVE-1999-0001

cvelogic Threat Intelligence