CVE-2016-5427

MITRE NVD CVE.ORG JSON API Print: PDF PDF

Summary

CVECVE-2016-5427
StatePUBLISHED
Assignerredhat
Source PriorityCVE Program / NVD first with legacy fallback
Published2016-09-21 14:25:15 UTC
Updated2026-05-06 22:30:45 UTC
DescriptionPowerDNS (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.

Risk And Classification

Primary CVSS: v3.0 7.5 HIGH from [email protected]

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS: 0.855470000 probability, percentile 0.993750000 (date 2026-05-06)

Problem Types: CWE-399 | n/a

VersionSourceTypeScoreSeverityVector
3.0[email protected]Primary7.5HIGHCVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
2.0[email protected]Primary5AV:N/AC:L/Au:N/C:N/I:N/A:P

CVSS v3.0 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

CVSS v2.0 Breakdown

Access Vector
Network
Access Complexity
Low
Authentication
None
Confidentiality
None
Integrity
None
Availability
Partial

AV:N/AC:L/Au:N/C:N/I:N/A:P

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Powerdns Authoritative All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
Advisory 2016-01 af854a3a-2127-422b-91ae-364da2661108 doc.powerdns.com Vendor Advisory
PowerDNS Authoritative Server Query Processing Flaws Let Remote Users Consume Excessive Resources on the Target Backend System - SecurityTracker af854a3a-2127-422b-91ae-364da2661108 www.securitytracker.com
PowerDNS Multiple Denial of Service Vulnerabilities af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
Debian -- Security Information -- DSA-3664-1 pdns af854a3a-2127-422b-91ae-364da2661108 www.debian.org
oss-security - PowerDNS Security Advisory 2016-01: Crafted queries can cause unexpected backend load af854a3a-2127-422b-91ae-364da2661108 www.openwall.com Release Notes
Reject qname's wirelength > 255, `chopOff()` handle dot inside labels · PowerDNS/pdns@881b5b0 · GitHub af854a3a-2127-422b-91ae-364da2661108 github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report