National Vulnerability Database

National Vulnerability Database

National Vulnerability
Database

CVE-2016-7068 Detail

Current 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.

Source:  MITRE
View Analysis Description

Impact

CVSS v3.0 Severity and Metrics:

Base Score: 7.5 HIGH
Vector: AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H (V3 legend)
Impact Score: 3.6
Exploitability Score: 3.9


Attack Vector (AV): Network
Attack Complexity (AC): Low
Privileges Required (PR): None
User Interaction (UI): None
Scope (S): Unchanged
Confidentiality (C): None
Integrity (I): None
Availability (A): High

CVSS v2.0 Severity and Metrics:

Base Score: 7.8 HIGH
Vector: (AV:N/AC:L/Au:N/C:N/I:N/A:C) (V2 legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0


Access Vector (AV): Network
Access Complexity (AC): Low
Authentication (AU): None
Confidentiality (C): None
Integrity (I): None
Availability (A): Complete
Additional Information:
Allows disruption of service

References to Advisories, Solutions, and Tools

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

Technical Details

Vulnerability Type (View All)

  • Uncontrolled Resource Consumption (CWE-400)

Known Affected Software Configurations Switch to CPE 2.2

Configuration 1 ( hide )
 cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
3.4.11
 cpe:2.3:a:powerdns:authoritative:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.0.0
Up to (excluding)
4.0.2
 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
Up to (excluding)
3.7.4
 cpe:2.3:a:powerdns:recursor:*:*:*:*:*:*:*:*
     Show Matching CPE(s)
From (including)
4.0.0
Up to (excluding)
4.0.4

Configuration 2 ( hide )
 cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*
     Show Matching CPE(s)


Change History

2 change records found - show changes

Quick Info

CVE Dictionary Entry:
CVE-2016-7068
NVD Published Date:
09/11/2018
NVD Last Modified:
11/16/2018