CVE-2018-10920

Knot Resolver vulnerability

CVSS

6.8

EPSS

3.2%

EPSS pct

87th

Exploited

No known

Improper input validation bug in DNS resolver component of Knot Resolver before 2.4.1 allows remote attacker to poison cache.

Affected vendor

Nic

Affected product

Knot Resolver

CVSS vector

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:N/I:H/A:N

Weakness type (CWE)

CWE-20 — Improper Input Validation

Published

2018-08-02

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, high attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to integrity.

Its EPSS score of 3.2% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 87% of all scored CVEs.

Check your external exposure to CVE-2018-10920

Confirm whether Nic Knot Resolver is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2018-10920.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2018-10920

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2018-10920 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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