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TI-2018-07732 Aliases CVE-2018-10920GHSA-xv4h-w5rx-q9c8

Improper input validation in CZ.NIC knot-resolver

Priority LOW 36CWE-20Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
—
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · NVD. Fix status from CNA.

Summary

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

Why it matters now

EPSS 0.03239 88th percentileScored 2026-11-07
Fix Fixed knot-resolver (cz.nic): 2.4.1

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
CZ.NICknot-resolverbefore 2.4.12.4.1Patch availableCNA
  • knot-resolver VendorCZ.NIC Affected before 2.4.1 Fixed in 2.4.1 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:*before 2.4.1VulnerableCZ.NIC
  • cpe:2.3:a:nic:knot_resolver:*:*:*:*:*:*:*:* Versions before 2.4.1 Vulnerable ·CZ.NIC

Remediation

  • Fix · CNA knot-resolver (cz.nic) Fixed in 2.4.1

Vendor assessments

Red Hat

Red Hat's page for this CVE →

Not affected: 1 product
  • Red Hat

Timeline

  1. 2026-10-02 Threatist record created from CVE-2018-10920
  2. 2026-10-03 Alias added: GHSA-xv4h-w5rx-q9c8

References

Advisory 2

  • TI-2023-27571 Certain DNSSEC aspects of the DNS protocol (in RFC 4033, 4034, 4035, 6840, and related… CVSS 3.1HIGH 7.5
  • TI-2020-10072 Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an… CVSS 3.1HIGH 7.5
  • TI-2022-19055 Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU… CVSS 3.1HIGH 7.5
  • TI-2023-24930 Knot Resolver before 5.7.0 performs many TCP reconnections upon receiving certain nonsensical responses from servers. CVSS 3.1HIGH 7.5
  • TI-2023-11416 Knot Resolver before 5.6.0 enables attackers to consume its resources, launching… CVSS 3.1HIGH 7.5
  • TI-2019-13943 knot-resolver before version 4.3.0 is vulnerable to denial of service through high CPU… CVSS 3.1HIGH 7.5
See all 13 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences