CVE-2016-7068 Information

Description

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.

CVSS Vector

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

Reference

https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068 https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/ https://www.debian.org/security/2017/dsa-3763 https://www.debian.org/security/2017/dsa-3764

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

NONE

Availability Impact

NONE

Base Score

HIGH

Base Severity

7.5