Vulnerability CVE-2016-5427

Vulnerability Name:

CVE-2016-5427 (CCN-116793)

Assigned:

2016-09-09

Published:

2016-09-09

Updated:

2017-08-13

Summary:

PowerDNS (aka pdns) Authoritative Server before 3.4.10 does not properly handle a . (dot) inside labels, which allows remote attackers to cause a denial of service (backend CPU consumption) via a crafted DNS query.

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:

5.0 Medium (CVSS v2 Vector: AV:N/AC:L/Au:N/C:N/I:N/A:P)

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

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-399

Vulnerability Consequences:

Denial of Service

References:

Source: MITRE
Type: CNA
CVE-2016-5427

Source: CCN
Type: SECTRACK ID: 1036761
PowerDNS Authoritative Server Query Processing Flaws Let Remote Users Consume Excessive Resources on the Target Backend System

Source: DEBIAN
Type: UNKNOWN
DSA-3664

Source: MLIST
Type: Release Notes
[oss-security] 20160909 PowerDNS Security Advisory 2016-01: Crafted queries can cause unexpected backend load

Source: BID
Type: UNKNOWN
92917

Source: SECTRACK
Type: UNKNOWN
1036761

Source: CCN
Type: PowerDNS Web site
PowerDNS Security Advisory 2016-01: Crafted queries can cause unexpected backend load

Source: CONFIRM
Type: Vendor Advisory
https://doc.powerdns.com/md/security/powerdns-advisory-2016-01/

Source: XF
Type: UNKNOWN
powerdns-authserv-cve20165427-dos(116793)

Source: CONFIRM
Type: UNKNOWN
https://github.com/PowerDNS/pdns/commit/881b5b03a590198d03008e4200dd00cc537712f3

Source: CCN
Type: WhiteSource Vulnerability Database
CVE-2016-5427

Vulnerable Configuration:

Configuration 1:

cpe:/a:powerdns:authoritative:*:*:*:*:*:*:*:* (Version <= 3.4.9)

Denotes that component is vulnerable

Oval Definitions

Definition ID	Class	Title	Last Modified
oval:org.opensuse.security:def:20165427	V	CVE-2016-5427	2018-05-02
oval:org.cisecurity:def:1206	P	DSA-3664-1 -- pdns -- security update	2016-11-10
oval:com.ubuntu.artful:def:20165427000	V	CVE-2016-5427 on Ubuntu 17.10 (artful) - low.	2016-09-21
oval:com.ubuntu.trusty:def:20165427000	V	CVE-2016-5427 on Ubuntu 14.04 LTS (trusty) - low.	2016-09-21
oval:com.ubuntu.cosmic:def:201654270000000	V	CVE-2016-5427 on Ubuntu 18.10 (cosmic) - low.	2016-09-21
oval:com.ubuntu.bionic:def:20165427000	V	CVE-2016-5427 on Ubuntu 18.04 LTS (bionic) - low.	2016-09-21
oval:com.ubuntu.xenial:def:20165427000	V	CVE-2016-5427 on Ubuntu 16.04 LTS (xenial) - low.	2016-09-21
oval:com.ubuntu.bionic:def:201654270000000	V	CVE-2016-5427 on Ubuntu 18.04 LTS (bionic) - low.	2016-09-21
oval:com.ubuntu.cosmic:def:20165427000	V	CVE-2016-5427 on Ubuntu 18.10 (cosmic) - low.	2016-09-21
oval:com.ubuntu.xenial:def:201654270000000	V	CVE-2016-5427 on Ubuntu 16.04 LTS (xenial) - low.	2016-09-21
oval:com.ubuntu.precise:def:20165427000	V	CVE-2016-5427 on Ubuntu 12.04 LTS (precise) - low.	2016-09-21

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