Vulnerability CVE-2016-7068

Vulnerability Name:

CVE-2016-7068 (CCN-151759)

Assigned:

2016-12-15

Published:

2016-12-15

Updated:

2019-10-09

Summary:

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 v3 Severity:

7.5 High (CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

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

7.5 High (CCN CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)
6.5 Medium (CCN Temporal CVSS v3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C)

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

CVSS v2 Severity:

7.8 High (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Authentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

7.8 High (CCN CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:C)

Exploitability Metrics:	Access Vector (AV): Network Access Complexity (AC): Low Athentication (Au): None
Impact Metrics:	Confidentiality (C): None Integrity (I): None Availibility (A): Complete

Vulnerability Type:

CWE-400

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2016-7068

Source: CONFIRM
Type: Issue Tracking, Third Party Advisory
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2016-7068

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

Source: CONFIRM
Type: Vendor Advisory
https://doc.powerdns.com/md/security/powerdns-advisory-2016-02/

Source: XF
Type: UNKNOWN
powerdns-cve20167068-dos(151759)

Source: DEBIAN
Type: Third Party Advisory
DSA-3763

Source: DEBIAN
Type: Third Party Advisory
DSA-3764

Vulnerable Configuration:

Configuration 1:

cpe:/a:powerdns:authoritative:*:*:*:*:*:*:*:* (Version < 3.4.11)

OR cpe:/a:powerdns:authoritative:*:*:*:*:*:*:*:* (Version >= 4.0.0 and < 4.0.2)

OR cpe:/a:powerdns:recursor:*:*:*:*:*:*:*:* (Version < 3.7.4)

OR cpe:/a:powerdns:recursor:*:*:*:*:*:*:*:* (Version >= 4.0.0 and < 4.0.4)

Configuration 2:

cpe:/o:debian:debian_linux:8.0:*:*:*:*:*:*:*

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:20167068	V	CVE-2016-7068	2022-06-30
oval:org.opensuse.security:def:113102	P	pdns-4.5.1-1.5 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:113104	P	pdns-recursor-4.5.5-1.3 on GA media (Moderate)	2022-01-17
oval:org.opensuse.security:def:106539	P	pdns-recursor-4.5.5-1.3 on GA media (Moderate)	2021-10-01
oval:org.opensuse.security:def:106537	P	pdns-4.5.1-1.5 on GA media (Moderate)	2021-10-01
oval:com.ubuntu.xenial:def:201670680000000	V	CVE-2016-7068 on Ubuntu 16.04 LTS (xenial) - low.	2018-09-11
oval:com.ubuntu.trusty:def:20167068000	V	CVE-2016-7068 on Ubuntu 14.04 LTS (trusty) - low.	2018-09-11
oval:com.ubuntu.bionic:def:20167068000	V	CVE-2016-7068 on Ubuntu 18.04 LTS (bionic) - low.	2018-09-11
oval:com.ubuntu.disco:def:201670680000000	V	CVE-2016-7068 on Ubuntu 19.04 (disco) - low.	2018-09-11
oval:com.ubuntu.xenial:def:20167068000	V	CVE-2016-7068 on Ubuntu 16.04 LTS (xenial) - low.	2018-09-11
oval:com.ubuntu.cosmic:def:201670680000000	V	CVE-2016-7068 on Ubuntu 18.10 (cosmic) - low.	2018-09-11
oval:com.ubuntu.cosmic:def:20167068000	V	CVE-2016-7068 on Ubuntu 18.10 (cosmic) - low.	2018-09-11
oval:com.ubuntu.bionic:def:201670680000000	V	CVE-2016-7068 on Ubuntu 18.04 LTS (bionic) - low.	2018-09-11
oval:org.cisecurity:def:1763	P	DSA-3764-1 -- pdns -- security update	2017-02-24
oval:org.cisecurity:def:1753	P	DSA-3763-1 -- pdns-recursor -- security update	2017-02-24
oval:com.ubuntu.artful:def:20167068000	V	CVE-2016-7068 on Ubuntu 17.10 (artful) - low.	2017-01-13
oval:com.ubuntu.precise:def:20167068000	V	CVE-2016-7068 on Ubuntu 12.04 LTS (precise) - low.	2017-01-13

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