VDB-93249 · CVE-2016-8864 · AA-01434

ISC BIND up to 9.8.x/9.9.9-P3/9.9.9-S5/9.10.4-P3/9.11.0 DNAME Response db.c input validation

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

Summaryinfo

A vulnerability identified as problematic has been detected in ISC BIND up to 9.8.x/9.9.9-P3/9.9.9-S5/9.10.4-P3/9.11.0. This affects an unknown part of the file db.c of the component DNAME Response Handler. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2016-8864. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to install a patch to address this issue.

Detailsinfo

A vulnerability classified as critical has been found in ISC BIND up to 9.8.x/9.9.9-P3/9.9.9-S5/9.10.4-P3/9.11.0 (Domain Name Software). This affects some unknown functionality of the file db.c of the component DNAME Response Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability.

The weakness was shared 11/01/2016 by Marco Davids with SIDN as AA-01434 as confirmed advisory (Website). The advisory is shared at kb.isc.org. This vulnerability is uniquely identified as CVE-2016-8864 since 10/20/2016. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details are known, but no exploit is available. The advisory points out:

During processing of a recursive response that contains a DNAME record in the answer section, BIND can stop execution after encountering an assertion error in resolver.c (error message: "INSIST((valoptions & 0x0002U) != 0) failed") or db.c (error message: "REQUIRE(targetp != ((void *)0) && *targetp == ((void *)0)) failed").

The vulnerability scanner Nessus provides a plugin with the ID 94503 (RHEL 5 : bind97 (RHSA-2016:2142)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Red Hat Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157363 (Oracle Enterprise Linux Security Update for bind (ELSA-2017-0063)).

Applying the patch 9.9.9-P4/9.10.4-P4/9.11.0-P1 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 (94503), SecurityFocus (BID 94067†) and SecurityTracker (ID 1037156†). The entries VDB-95200 and VDB-95201 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

Domain Name Software

Vendor

Name

BIND

Version

License

open-source

Website

Vendor: https://www.isc.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

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: 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: 🔍

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 94503
Nessus Name: RHEL 5 : bind97 (RHSA-2016:2142)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 841597
OpenVAS Name: SuSE Update for bind openSUSE-SU-2016:2738-1 (bind)
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-P4/9.10.4-P4/9.11.0-P1

Timelineinfo

10/20/2016 🔍
11/01/2016 +12 days 🔍
11/01/2016 +0 days 🔍
11/01/2016 +0 days 🔍
11/02/2016 +1 days 🔍
11/02/2016 +0 days 🔍
11/03/2016 +1 days 🔍
11/04/2016 +1 days 🔍
09/29/2022 +2155 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01434
Researcher: Marco Davids
Organization: SIDN
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-8864 (🔍)
GCVE (CVE): GCVE-0-2016-8864
GCVE (VulDB): GCVE-100-93249

OVAL: 🔍

SecurityFocus: 94067 - ISC BIND CVE-2016-8864 Remote Denial of Service Vulnerability
SecurityTracker: 1037156

See also: 🔍

Entryinfo

Created: 11/04/2016 08:10
Updated: 09/29/2022 10:41
Changes: 11/04/2016 08:10 (76), 05/23/2019 17:33 (13), 09/29/2022 10:41 (4)
Complete: 🔍
Cache ID: 216:4DF:103

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