Resource exhaustion in Nic Knot_resolver
CVE-2020-12667
Knot Resolver before 5.1.1 allows traffic amplification via a crafted DNS answer from an attacker-controlled server, aka an "NXNSAttack" issue. This is triggered by random subdomains in the NSDNAME in NS records.
Vulnerability class: DoS (Denial of Service)
EPSS: 0.026 (83.5th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
Affected products
- Nic Knot_resolver
- N/a — versions n/a
Weakness classification (CWE)
References
- cve@mitre.org (Technical Description, Vendor Advisory)
- cve@mitre.org (Release Notes, Vendor Advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
- cve@mitre.org (Technical Description, Third Party Advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (mailing-list)
Frequently asked questions
- What is CVE-2020-12667?
- CVE-2020-12667 is a high-severity vulnerability in Nic Knot_resolver, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-05-19.
- How severe is CVE-2020-12667?
- High severity. CVSS v3 base score is 7.5 out of 10.