CVE-2016-7068

An issue has been found in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, allowing a remote, unauthenticated attacker to cause an abnormal CPU usage load on the PowerDNS server by sending crafted DNS queries, which might result in a partial denial of service if the system becomes overloaded. This issue is based on the fact that the PowerDNS server parses all records present in a query regardless of whether they are needed or even legitimate. A specially crafted query containing a large number of records can be used to take advantage of that behaviour.

• CWE-20
• CWE-400

• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068Issue Tracking, Third Party Advisory
• https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/Vendor Advisory
• https://www.debian.org/security/2017/dsa-3763Third Party Advisory
• https://www.debian.org/security/2017/dsa-3764Third Party Advisory
• https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068Issue Tracking, Third Party Advisory
• https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/Vendor Advisory
• https://www.debian.org/security/2017/dsa-3763Third Party Advisory
• https://www.debian.org/security/2017/dsa-3764Third Party Advisory

Published

Sep 11, 2018

Last Modified

Jun 17, 2026

Status

Modified

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