Vulnerability in Nic Knot_resolver
CVE-2022-40188
Knot Resolver before 5.5.3 allows remote attackers to cause a denial of service (CPU consumption) because of algorithmic complexity. During an attack, an authoritative server must return large NS sets or address sets.
EPSS: 0.015 (70.1th 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
- Debian Debian_linux — versions 10.0
- Fedoraproject Fedora — versions 35, 36, 37
- N/a — versions n/a
Weakness classification (CWE)
Public proof-of-concept exploits
References
- cve@mitre.org (Third Party Advisory, Release Notes)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (vendor-advisory)
- cve@mitre.org (mailing-list, Mailing List, Third Party Advisory)
Frequently asked questions
- What is CVE-2022-40188?
- CVE-2022-40188 is a high-severity vulnerability in Nic Knot_resolver, classified under Inefficient Algorithmic Complexity. CVSS score: 7.5/10. Published 2022-09-23.
- How severe is CVE-2022-40188?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2022-40188 known to be exploited?
- 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.