How severe is CVE-2018-1000002?

CVE-2018-1000002 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.

Is CVE-2018-1000002 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2018-1000002?

CVE-2018-1000002 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2018-1000002?

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

When was CVE-2018-1000002 published?

CVE-2018-1000002 was published on 2018-01-22 and last updated on 2026-06-17.

CVE-2018-1000002

CVE-2018-1000002 is a low-severity vulnerability in Nic Knot Resolver with a CVSS 3.x base score of 3.7. 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: Low (CVSS 3.x base score 3.7)
CVSS v2: 4.3
EPSS exploit prediction: 1% (63rd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-20
Affected product: Nic Knot Resolver
Published: 2018-01-22
Last modified: 2026-06-17

Description

Improper input validation bugs in DNSSEC validators components in Knot Resolver (prior version 1.5.2) allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet replay.

Frequently asked questions

What is CVE-2018-1000002?: Improper input validation bugs in DNSSEC validators components in Knot Resolver (prior version 1.5.2) allow attacker in man-in-the-middle position to deny existence of some data in DNS via packet replay.
How severe is CVE-2018-1000002?: CVE-2018-1000002 has a CVSS 3.x base score of 3.7, rated low severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is none, integrity none, and availability low.
Is CVE-2018-1000002 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (63rd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2018-1000002?: CVE-2018-1000002 affects Nic Knot Resolver. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2018-1000002?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2018-1000002 published?: CVE-2018-1000002 was published on 2018-01-22 and last updated on 2026-06-17.

References

https://www.knot-resolver.cz/2018-01-22-knot-resolver-1.5.2.html

Affected products (1)

cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*

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