VDB-122263 · CVE-2017-15120 · Nessus 110520

PowerDNS Recursor up to 4.0.7 null pointer dereference

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.
6.7	$0-$5k	0.00

Summaryinfo

A vulnerability, which was classified as problematic, has been found in PowerDNS Recursor up to 4.0.7. This impacts an unknown function. This manipulation causes null pointer dereference. This vulnerability appears as CVE-2017-15120. The attack may be initiated remotely. There is no available exploit. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PowerDNS Recursor up to 4.0.7 (Domain Name Software). It has been declared as problematic. Affected by this vulnerability is an unknown functionality. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. The summary by CVE is:

An issue has been found in the parsing of authoritative answers in PowerDNS Recursor before 4.0.8, leading to a NULL pointer dereference when parsing a specially crafted answer containing a CNAME of a different class than IN. An unauthenticated remote attacker could cause a denial of service.

The bug was discovered 12/05/2017. The weakness was presented 07/27/2018 as not defined mailinglist post (oss-sec). It is possible to read the advisory at seclists.org. This vulnerability is known as CVE-2017-15120 since 10/08/2017. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability was handled as a non-public zero-day exploit for at least 190 days. During that time the estimated underground price was around $0-$5k. The vulnerability scanner Nessus provides a plugin with the ID 110520 (Fedora 27 : pdns-recursor (2018-76c82b393e)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Fedora Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 277398 (Fedora Security Update for pdns-recursor (FEDORA-2018-76c82b393e)).

Upgrading to version 4.0.8 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 (110520) and SecurityFocus (BID 106335†). See VDB-112287 and VDB-112331 for similar entries. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Domain Name Software

Name

PowerDNS Recursor

Version

License

free

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.8
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 7.5
CNA Vector (Red Hat, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / 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-Day	Unlock	Unlock	Unlock	Unlock
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Nessus ID: 110520
Nessus Name: Fedora 27 : pdns-recursor (2018-76c82b393e)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 65129
OpenVAS Name: Debian Security Advisory DSA 4063-1 (pdns-recursor - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: PowerDNS Recursor 4.0.8

Timelineinfo

10/08/2017 🔍
12/05/2017 +58 days 🔍
06/13/2018 +189 days 🔍
06/14/2018 +1 days 🔍
07/27/2018 +42 days 🔍
07/27/2018 +0 days 🔍
07/28/2018 +1 days 🔍
12/11/2018 +136 days 🔍
04/27/2023 +1598 days 🔍

Sourcesinfo

Advisory: FEDORA-2018-76c82b393e
Status: Not defined
Confirmation: 🔍

CVE: CVE-2017-15120 (🔍)
GCVE (CVE): GCVE-0-2017-15120
GCVE (VulDB): GCVE-100-122263

OVAL: 🔍

SecurityFocus: 106335 - PowerDNS Recursor CVE-2017-15120 Denial of Service Vulnerability

See also: 🔍

Entryinfo

Created: 07/28/2018 07:13
Updated: 04/27/2023 09:55
Changes: 07/28/2018 07:13 (77), 03/10/2020 19:23 (3), 04/27/2023 09:51 (14), 04/27/2023 09:55 (1)
Complete: 🔍
Cache ID: 216::103