PowerDNS Authoritative Server up to 4.0.0 AXFR/IXFR Response resource consumption

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.
6.6$0-$5k0.00

Summaryinfo

A vulnerability was found in PowerDNS Authoritative Server up to 4.0.0. It has been rated as problematic. The affected element is an unknown function of the component AXFR/IXFR Response Handler. This manipulation causes resource consumption. This vulnerability is tracked as CVE-2016-6172. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in PowerDNS Authoritative Server up to 4.0.0 (Domain Name Software). Affected by this vulnerability is an unknown function of the component AXFR/IXFR Response Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

PowerDNS (aka pdns) Authoritative Server before 4.0.1 allows remote primary DNS servers to cause a denial of service (memory exhaustion and secondary DNS server crash) via a large (1) AXFR or (2) IXFR response.

The weakness was disclosed 09/26/2016 (Website). The advisory is shared at lists.opensuse.org. This vulnerability is known as CVE-2016-6172 since 07/06/2016. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

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 4.0.1 eliminates this vulnerability. A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (93419) and SecurityFocus (BID 91678†). The entries VDB-91408, VDB-91409, VDB-96764 and VDB-96765 are pretty similar. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

Vendor

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.6

VulDB Base Score: 6.8
VulDB Temp Score: 6.5
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 6.8
NVD Vector: 🔍

CVSSv2info

AVACAuCIA
💳💳💳💳💳💳
💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock
UnlockUnlockUnlockUnlockUnlockUnlock

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

NVD Base Score: 🔍

Exploitinginfo

Class: Resource consumption
CWE: CWE-400 / CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

0-DayUnlockUnlockUnlockUnlock
TodayUnlockUnlockUnlockUnlock

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

OpenVAS ID: 841499
OpenVAS Name: PowerDNS AXFR Response Denial of Service Vulnerability
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Authoritative Server 4.0.1
Patch: github.com

Timelineinfo

07/06/2016 🔍
07/07/2016 +1 days 🔍
09/10/2016 +65 days 🔍
09/12/2016 +2 days 🔍
09/26/2016 +14 days 🔍
09/26/2016 +0 days 🔍
09/27/2016 +1 days 🔍
09/21/2022 +2185 days 🔍

Sourcesinfo

Advisory: 4128
Status: Not defined
Confirmation: 🔍

CVE: CVE-2016-6172 (🔍)
GCVE (CVE): GCVE-0-2016-6172
GCVE (VulDB): GCVE-100-92197

OVAL: 🔍

SecurityFocus: 91678 - Multiple DNS Servers Remote Denial of Service Vulnerability
SecurityTracker: 1036242

See also: 🔍

Entryinfo

Created: 09/27/2016 10:49
Updated: 09/21/2022 13:16
Changes: 09/27/2016 10:49 (66), 04/26/2019 16:55 (13), 09/21/2022 13:16 (5)
Complete: 🔍
Cache ID: 216:7ED:103

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Discussion

No comments yet. Languages: en.

Please log in to comment.

◂ PreviousOverviewNext ▸

Do you know our Splunk app?

Download it now for free!