CVE-2016-7068: Input Validation
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.
Affected Software
Event History
Frequently Asked Questions
What is CVE-2016-7068?
CVE-2016-7068 is a vulnerability in PowerDNS before 3.4.11 and 4.0.2, and PowerDNS recursor before 3.7.4 and 4.0.4, that allows a remote, unauthenticated attacker to cause abnormal CPU usage load on the PowerDNS server.
What is the severity of CVE-2016-7068?
The severity of CVE-2016-7068 is high, with a severity value of 7.5.
How does CVE-2016-7068 affect PowerDNS?
CVE-2016-7068 affects PowerDNS versions before 3.4.11 and 4.0.2, and PowerDNS recursor versions before 3.7.4 and 4.0.4.
How can CVE-2016-7068 be exploited?
CVE-2016-7068 can be exploited by sending crafted DNS queries to the PowerDNS server, causing abnormal CPU usage.
Is there a fix for CVE-2016-7068?
Yes, updating to PowerDNS version 3.4.11 or 4.0.2 (for PowerDNS authoritative), and version 3.7.4 or 4.0.4 (for PowerDNS recursor) will fix the vulnerability.