CVE•Published 2021-07-30•1 article on news•7 live references•NVD data
CVE-2021-36754
Vulnerability data via CVEDB (Shodan)
CVSS v3.1
7.5
HIGH
EPSS percentile
99
Exploit Prediction Scoring System · top 1% of all CVEs
Description
PowerDNS Authoritative Server 4.5.0 before 4.5.1 allows anybody to crash the process by sending a specific query (QTYPE 65535) that causes an out-of-bounds exception.
Timeline
Published 2021-07-30
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-2021-36754Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Powerdns Authoritative Server" version:"4.5.0"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Authoritative Server"HTTP body or banner mentions "Authoritative Server" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2021-36754Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2021-36754Censys host search filtered to this CVE id.
grep.app
CVE-2021-36754Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2021-36754GitHub code search for direct mentions.
Google dork
"CVE-2021-36754" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2021-36754 on GitHub.