How severe is CVE-2002-0514?

CVE-2002-0514 has a CVSS 2.0 base score of 5.0, rated medium severity.

Is CVE-2002-0514 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2002-0514?

CVE-2002-0514 affects Openbsd. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2002-0514?

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

When was CVE-2002-0514 published?

CVE-2002-0514 was published on 2002-08-12 and last updated on 2026-06-16.

CVE-2002-0514

CVE-2002-0514 is a medium-severity vulnerability in Openbsd 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-203.

Key facts

Severity: Medium (CVSS 2.0 base score 5.0)
EPSS exploit prediction: 2% (78th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-203
Affected product: Openbsd
Published: 2002-08-12
Last modified: 2026-06-16

Description

PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL.

Frequently asked questions

What is CVE-2002-0514?: PF in OpenBSD 3.0 with the return-rst rule sets the TTL to 128 in the RST packet, which allows remote attackers to determine if a port is being filtered because the TTL is different than the default TTL.
How severe is CVE-2002-0514?: CVE-2002-0514 has a CVSS 2.0 base score of 5.0, rated medium severity.
Is CVE-2002-0514 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 2% (78th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2002-0514?: CVE-2002-0514 affects Openbsd. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2002-0514?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2002-0514 published?: CVE-2002-0514 was published on 2002-08-12 and last updated on 2026-06-16.

References

Affected products (1)

cpe:2.3:o:openbsd:openbsd:3.0:*:*:*:*:*:*:*

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