How severe is CVE-1999-0001?

CVE-1999-0001 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-0001 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-0001?

CVE-1999-0001 primarily affects Bsdi Bsd Os. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-0001?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-1999-0001 published?

CVE-1999-0001 was published on 1999-12-30 and last updated on 2026-06-16.

CVE-1999-0001

CVE-1999-0001 is a medium-severity vulnerability in Bsdi Bsd Os with a CVSS 2.0 base score of 5.0. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-20.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (87th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Bsdi Bsd Os
Published: 1999-12-30
Last modified: 2026-06-16

Description

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

Frequently asked questions

What is 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.
How severe is CVE-1999-0001?: CVE-1999-0001 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-0001 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (87th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-0001?: CVE-1999-0001 primarily affects Bsdi Bsd Os. In total, 23 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-0001?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-0001 published?: CVE-1999-0001 was published on 1999-12-30 and last updated on 2026-06-16.

References

Affected products (23)

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

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