Vulnerability Details

PowerDNS Security Advisory 2016-02: Crafted queries can cause abnormal CPU usage

Published: 2018-09-12 14:54:11
CVE Author: NIST National Vulnerability Database

CVSS Base Vector:
AV:N/AC:L/Au:N/C:N/I:N/A:C

Detection Type:
Remote Banner Unreliable

Solution Type:
Vendor Patch

Summary:
An issue has been found in PowerDNS 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. This issue has been assigned CVE-2016-7068.

Detection Method:
Checks if a vulnerable version is present on the target host.

Affected Versions:
PowerDNS Authoritative Server up to and including 3.4.10 and 4.0.1 are affected. PowerDNS Recursor up to and including 3.7.3 and 4.0.3 are affected.

Recommendations:
Update PowerDNS Authoritative Server to version 3.4.11 or 4.0.2 respectively. Update PowerDNS Recursor to 3.7.4 or 4.0.4 respectively.

NIST (National Institute of Standards and Technology) NVD (National Vulnerability Database)

https://nvd.nist.gov/vuln/detail/CVE-2016-7068

References:

https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/

Severity
High
CVSS Score
7.8
Published
2018-09-12
Modified
2018-11-21
Category
Denial of Service

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