ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1 DNSSEC 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, was found in ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1. This affects an unknown function of the component DNSSEC Handler. The manipulation results in input validation. This vulnerability is reported as CVE-2016-9147. The attack can be launched remotely. No exploit exists. A patch should be applied to remediate this issue.

Detailsinfo

A vulnerability classified as critical has been found in ISC BIND up to 9.9.9-P4/9.10.4-P4/9.11.0-P1 (Domain Name Software). Affected is some unknown functionality of the component DNSSEC 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. CVE summarizes:

named in ISC BIND 9.9.9-P4, 9.9.9-S6, 9.10.4-P4, and 9.11.0-P1 allows remote attackers to cause a denial of service (assertion failure and daemon exit) via a response containing an inconsistency among the DNSSEC-related RRsets.

The bug was discovered 01/11/2017. The weakness was disclosed 01/11/2017 as AA-01440 as confirmed security advisory (Website). The advisory is available at kb.isc.org. This vulnerability is traded as CVE-2016-9147 since 11/03/2016. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. The technical details are unknown and an exploit is not available. The advisory points out:

Depending on the type of query and the EDNS options in the query they receive, DNSSEC-enabled authoritative servers are expected to include RRSIG and other RRsets in their responses to recursive servers. DNSSEC-validating servers will also make specific queries for DS and other RRsets. Whether DNSSEC-validating or not, an error in processing malformed query responses that contain DNSSEC-related RRsets that are inconsistent with other RRsets in the same query response can trigger an assertion failure. Although 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.

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 95390†). The entries VDB-95200 and VDB-95201 are pretty similar. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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: 🔍
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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: 🔍
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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

11/03/2016 🔍
01/11/2017 +69 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/11/2017 +0 days 🔍
01/12/2017 +1 days 🔍
01/12/2017 +0 days 🔍
01/13/2017 +1 days 🔍
10/28/2022 +2114 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01440
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2016-9147 (🔍)
GCVE (CVE): GCVE-0-2016-9147
GCVE (VulDB): GCVE-100-95202

OVAL: 🔍

SecurityFocus: 95390 - ISC BIND CVE-2016-9147 Remote Denial of Service Vulnerability
OSVDB: - CVE-2016-9147 - ISC - BIND - Denial of Service Issue
SecurityTracker: 1037582

See also: 🔍

Entryinfo

Created: 01/12/2017 11:04
Updated: 10/28/2022 12:41
Changes: 01/12/2017 11:04 (96), 10/28/2022 12:41 (4)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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