CVE•Published 2017-02-09•Modified 2026-05-13•1 article on news•6 live references•NVD data
CVE-2016-6171Knot-dns · Knot_dns
Vulnerability data via NVD (ingested)
CVSS v3.1
8.6
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
EPSS percentile
—
Weaknesses (CWE)
Description
Knot DNS before 2.3.0 allows remote DNS servers to cause a denial of service (memory exhaustion and slave server crash) via a large zone transfer for (1) DDNS, (2) AXFR, or (3) IXFR.
Timeline
Published 2017-02-09
Modified 2026-05-13
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2016-6171Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Knot-dns Knot Dns"All exposed Knot-dns Knot Dns instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Knot Dns"HTTP body or banner mentions "Knot Dns" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2016-6171Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2016-6171Censys host search filtered to this CVE id.
grep.app
CVE-2016-6171Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2016-6171GitHub code search for direct mentions.
Google dork
"CVE-2016-6171" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.