ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1 DS Record Response input validation

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as critical, has been found in ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1. The impacted element is an unknown function of the component DS Record Response Handler. The manipulation leads to input validation. This vulnerability is documented as CVE-2016-9444. The attack can be initiated remotely. There is not any exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability was found in ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1 (Domain Name Software). It has been rated as critical. This issue affects an unknown functionality of the component DS Record Response Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. The summary by CVE is:

named in ISC BIND 9.x before 9.9.9-P5, 9.10.x before 9.10.4-P5, and 9.11.x before 9.11.0-P2 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a crafted DS resource record in an answer.

The bug was discovered 01/11/2017. The weakness was released 01/11/2017 as AA-01441 as confirmed security advisory (Website). The advisory is shared at kb.isc.org. The identification of this vulnerability is CVE-2016-9444 since 11/18/2016. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The advisory points out:

An unusually-formed answer containing a DS resource record could trigger an assertion failure. While the combination of properties which triggers the assertion should not occur in normal traffic, it is potentially possible for the assertion to be triggered deliberately by an attacker sending a specially-constructed answer having the required properties.

The vulnerability scanner Nessus provides a plugin with the ID 96483 (Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : bind9 vulnerabilities (USN-3172-1)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Ubuntu Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 196668 (Ubuntu Security Notification for Bind9 Vulnerabilities (USN-3172-1)). The advisory illustrates:

Successful exploitation of this vulnerability will cause named to encounter an assertion failure and stop executing, resulting in denial of service to clients.

Applying the patch 9.9.9-P5/9.10.4-P5/9.11.0-P2 is able to eliminate this problem. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (96483) and SecurityFocus (BID 95393†). Entries connected to this vulnerability are available at VDB-93249, VDB-95200 and VDB-95202. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

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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: 🔍

Vendor Base Score (ISC): 7.5
Vendor Vector (ISC): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CVSSv2info

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

NVD Base Score: 🔍

Exploitinginfo

Class: Input validation
CWE: CWE-20
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 96483
Nessus Name: Ubuntu 12.04 LTS / 14.04 LTS / 16.04 LTS / 16.10 : bind9 vulnerabilities (USN-3172-1)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 703758
OpenVAS Name: Debian Security Advisory DSA 3758-1 (bind9 - security update)
OpenVAS File: 🔍
OpenVAS Family: 🔍

Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Patch
Status: 🔍

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

Patch: 9.9.9-P5/9.10.4-P5/9.11.0-P2

Timelineinfo

11/18/2016 🔍
01/11/2017 +54 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/12/2017 +1 days 🔍
01/12/2017 +0 days 🔍
01/12/2017 +0 days 🔍
01/13/2017 +1 days 🔍
10/28/2022 +2114 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01441
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9444 (🔍)
GCVE (CVE): GCVE-0-2016-9444
GCVE (VulDB): GCVE-100-95201

OVAL: 🔍

SecurityFocus: 95393 - ISC BIND CVE-2016-9444 Remote Denial of Service Vulnerability
OSVDB: - CVE-2016-9444 - ISC - BIND - Denial of Service Issue
SecurityTracker: 1037582

See also: 🔍

Entryinfo

Created: 01/12/2017 11:02
Updated: 10/28/2022 12:34
Changes: 01/12/2017 11:02 (96), 10/28/2022 12:34 (4)
Complete: 🔍
Cache ID: 216::103

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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