How severe is CVE-1999-1339?

CVE-1999-1339 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-1999-1339 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-1999-1339?

CVE-1999-1339 primarily affects Freebsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-1999-1339?

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

When was CVE-1999-1339 published?

CVE-1999-1339 was published on 1999-12-31 and last updated on 2026-06-16.

CVE-1999-1339

CVE-1999-1339 is a medium-severity vulnerability in Freebsd 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.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 3% (84th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Freebsd
Published: 1999-12-31
Last modified: 2026-06-16

Description

Vulnerability when Network Address Translation (NAT) is enabled in Linux 2.2.10 and earlier with ipchains, or FreeBSD 3.2 with ipfw, allows remote attackers to cause a denial of service (kernel panic) via a ping -R (record route) command.

Frequently asked questions

What is CVE-1999-1339?: Vulnerability when Network Address Translation (NAT) is enabled in Linux 2.2.10 and earlier with ipchains, or FreeBSD 3.2 with ipfw, allows remote attackers to cause a denial of service (kernel panic) via a ping -R (record route) command.
How severe is CVE-1999-1339?: CVE-1999-1339 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-1999-1339 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 3% (84th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-1999-1339?: CVE-1999-1339 primarily affects Freebsd. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-1999-1339?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-1999-1339 published?: CVE-1999-1339 was published on 1999-12-31 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:o:freebsd:freebsd:3.2:*:*:*:*:*:*:*
cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*

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