CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
7.3	$0-$5k	0.00

A vulnerability was found in PowerDNS up to 3.4.9 (Domain Name Software) and classified as critical. This issue affects an unknown part of the component Authoritative Server Query Handler. The manipulation with the input value . leads to a resource management vulnerability. Using CWE to declare the problem leads to CWE-399. Impacted is availability. The summary by CVE is:

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.

The weakness was shared 09/09/2016 by Florian Heinz and Martin Kluge as PowerDNS Security Advisory 2016-01 as confirmed advisory (Website). The advisory is shared at doc.powerdns.com. The vendor cooperated in the coordination of the public release. The identification of this vulnerability is CVE-2016-5427 since 06/10/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Technical details are known, but no exploit is available.

The vulnerability scanner Nessus provides a plugin with the ID 93419 (Debian DSA-3664-1 : pdns - security update), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Debian Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 175834 (Debian Security Update for pdns (DSA 3664-1)).

Upgrading to version 3.4.10 or 4.0 eliminates this vulnerability. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (93419). The entries 91408 and 92197 are related to this item.

Productinfo

Type

• Domain Name Software

Name

• PowerDNS

Version

• 3.4.0
• 3.4.1
• 3.4.2
• 3.4.3
• 3.4.4
• 3.4.5
• 3.4.6
• 3.4.7
• 3.4.8
• 3.4.9

License

• open-source

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 7.3

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

AV	AC	Au	C	I	A
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳
💳	💳	💳	💳	💳	💳

Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock
unlock	unlock	unlock	unlock	unlock	unlock

VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Resource management
CWE: CWE-399 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-Day	unlock	unlock	unlock	unlock
Today	unlock	unlock	unlock	unlock

Nessus ID: 93419
Nessus Name: Debian DSA-3664-1 : pdns - security update
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 702904
OpenVAS Name: Fedora Update for pdns FEDORA-2016-efffcc7aec
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

Reaction Time: 🔍
0-Day Time: 🔍
Exposure Time: 🔍

Upgrade: PowerDNS 3.4.10/4.0
Patch: github.com

Timelineinfo

06/10/2016 🔍
09/09/2016 +91 days 🔍
09/09/2016 +0 days 🔍
09/09/2016 +0 days 🔍
09/09/2016 +0 days 🔍
09/11/2016 +2 days 🔍
09/12/2016 +1 days 🔍
09/21/2016 +9 days 🔍
09/15/2022 +2185 days 🔍

Sourcesinfo

Advisory: PowerDNS Security Advisory 2016-01
Researcher: Florian Heinz, Martin Kluge
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2016-5427 (🔍)
OVAL: 🔍

SecurityTracker: 1036761
SecurityFocus: 92917 - PowerDNS Multiple Denial of Service Vulnerabilities

See also: 🔍

Entryinfo

Created: 09/11/2016 11:19
Updated: 09/15/2022 11:10
Changes: 09/11/2016 11:19 (75), 04/13/2019 13:06 (12), 09/15/2022 11:10 (3)
Complete: 🔍

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