ISC BIND 9.9.0/9.10.0/9.10.1-P1 Response db.c input validation

CVSS Meta Temp Score
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CTI Interest Score
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A vulnerability was found in ISC BIND 9.9.0/9.10.0/9.10.1-P1 (Domain Name Software). It has been declared as critical. Affected by this vulnerability is an unknown functionality of the file db.c of the component Response Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability.

The weakness was released 12/15/2015 as AA-01317 as confirmed advisory (Website). The advisory is shared at This vulnerability is known as CVE-2015-8000 since 10/28/2015. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The advisory points out:

An error in the parsing of incoming responses allows some records with an incorrect class to be accepted by BIND instead of being rejected as malformed. This can trigger a REQUIRE assertion failure when those records are subsequently cached. Intentional exploitation of this condition is possible and could be used as a denial-of-service vector against servers performing recursive queries.

The vulnerability scanner Nessus provides a plugin with the ID 87380 (Amazon Linux AMI : bind (ALAS-2015-631)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Amazon Linux Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 157265 (Oracle Enterprise Linux Security Update for bind97 (ELSA-2016-1945)).

Upgrading to version 9.10.3-P1 or 9.10.3-P2 eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 30295.

The vulnerability is also documented in the databases at X-Force (108948) and Tenable (87380). Entry connected to this vulnerability is available at 80354.







CPE 2.3info

CPE 2.2info


VulDB Meta Base Score: 7.5
VulDB Meta Temp Score: 6.5

VulDB Base Score: 7.5
VulDB Temp Score: 6.5
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Class: Input validation
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Status: Unproven

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Nessus ID: 87380
Nessus Name: Amazon Linux AMI : bind (ALAS-2015-631)
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OpenVAS ID: 100313
OpenVAS Name: Amazon Linux Local Check: alas-2015-631
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Threat Intelligenceinfo

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Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: BIND 9.10.3-P1/9.10.3-P2
TippingPoint: 🔍

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10/28/2015 🔍
12/08/2015 +41 days 🔍
12/15/2015 +7 days 🔍
12/15/2015 +0 days 🔍
12/16/2015 +1 days 🔍
12/16/2015 +0 days 🔍
12/16/2015 +0 days 🔍
12/16/2015 +0 days 🔍
12/17/2015 +1 days 🔍
07/01/2022 +2388 days 🔍



Advisory: AA-01317
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2015-8000 (🔍)

X-Force: 108948 - ISC BIND db.c denial of service
SecurityTracker: 1034418
Vulnerability Center: 55318 - ISC BIND Remote DoS via Responses with a Malformed Class Attribute in DB.c, High
SecurityFocus: 79349 - ISC BIND CVE-2015-8000 Remote Denial of Service Vulnerability

See also: 🔍


Created: 12/16/2015 10:17 AM
Updated: 07/01/2022 08:22 AM
Changes: 12/16/2015 10:17 AM (75), 05/15/2018 09:20 AM (14), 07/01/2022 08:22 AM (3)
Complete: 🔍


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