CVE-2016-5427
(dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
Does this matter?
EPSS puts the probability of exploitation in the next 30 days at 63.0%, higher than 99% of all known CVEs. Patch or mitigate before the next change window.
Description
PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.
- CVSS 3.0
- 7.5 HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 62.98% probability · 99th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-399
- Affected
- powerdns/authoritative
- Source
- secalert@redhat.com
EPSS 63.0% since 4 November 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- http://www.debian.org/security/2016/dsa-3664
- http://www.openwall.com/lists/oss-security/2016/09/09/3Release Notes
- http://www.securityfocus.com/bid/92917
- http://www.securitytracker.com/id/1036761
- https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/Vendor Advisory
- https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3
- http://www.debian.org/security/2016/dsa-3664
- http://www.openwall.com/lists/oss-security/2016/09/09/3Release Notes
- http://www.securityfocus.com/bid/92917
- http://www.securitytracker.com/id/1036761
- https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/Vendor Advisory
- https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.