ISC BIND 9.12.0/9.12.1 Serve-Stale assertion

CVSS Meta Temp Score
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CTI Interest Score
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6.1$0-$5k0.00

Summaryinfo

A vulnerability categorized as critical has been discovered in ISC BIND 9.12.0/9.12.1. This vulnerability affects unknown code of the component Serve-Stale Handler. Executing a manipulation can lead to assertion. This vulnerability is registered as CVE-2018-5737. It is possible to launch the attack remotely. No exploit is available. Applying a patch is advised to resolve this issue.

Detailsinfo

A vulnerability classified as critical was found in ISC BIND 9.12.0/9.12.1 (Domain Name Software). This vulnerability affects an unknown functionality of the component Serve-Stale Handler. The manipulation with an unknown input leads to a assertion vulnerability. The CWE definition for the vulnerability is CWE-617. The product contains an assert() or similar statement that can be triggered by an attacker, which leads to an application exit or other behavior that is more severe than necessary. As an impact it is known to affect availability.

The bug was discovered 05/18/2018. The weakness was published 05/18/2018 by Tony Finch as AA-01606 as confirmed security advisory (Website). The advisory is shared for download at kb.isc.org. The public release has been coordinated with the vendor. This vulnerability was named CVE-2018-5737 since 01/17/2018. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. There are neither technical details nor an exploit publicly available. The advisory points out:

A problem with the implementation of the new serve-stale feature in BIND 9.12 can lead to an assertion failure in rbtdb.c, even when stale-answer-enable is off. Additionally, problematic interaction between the serve-stale feature and NSEC aggressive negative caching can in some cases cause undesirable behavior from named, such as a recursion loop or excessive logging.

The vulnerability scanner Nessus provides a plugin with the ID 109929 (FreeBSD : BIND -- multiple vulnerabilities (94599fe0-5ca3-11e8-8be1-d05099c0ae8c)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family FreeBSD Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 15101 (ISC BIND Multiple Vulnerabilities (AA-01606,AA-01602)).

Applying the patch 9.12.1-P1 is able to eliminate this problem. It is possible to mitigate the problem by applying the configuration setting max-stale-ttl 0;. The best possible mitigation is suggested to be patching the affected component. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at Tenable (109929), SecurityFocus (BID 104236†) and SecurityTracker (ID 1040942†). Similar entry is available at VDB-117999. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.1
VulDB Meta Temp Score: 6.1

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

Vendor Base Score (ISC): 5.9
Vendor Vector (ISC): 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 5.9
CNA Vector (Internet Systems Consortium (ISC)): 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Assertion
CWE: CWE-617
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: 109929
Nessus Name: FreeBSD : BIND -- multiple vulnerabilities (94599fe0-5ca3-11e8-8be1-d05099c0ae8c)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍

OpenVAS ID: 64969
OpenVAS Name: ISC BIND Multiple Denial of Service Vulnerabilities-May18
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: 9.12.1-P1
Config: max-stale-ttl 0;

Timelineinfo

01/17/2018 🔍
05/18/2018 +121 days 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/18/2018 +0 days 🔍
05/19/2018 +1 days 🔍
05/21/2018 +2 days 🔍
01/16/2019 +240 days 🔍
03/14/2023 +1518 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: AA-01606
Researcher: Tony Finch
Status: Confirmed
Confirmation: 🔍
Coordinated: 🔍

CVE: CVE-2018-5737 (🔍)
GCVE (CVE): GCVE-0-2018-5737
GCVE (VulDB): GCVE-100-118000
SecurityFocus: 104236 - ISC BIND CVE-2018-5737 Remote Denial of Service Vulnerability
SecurityTracker: 1040942

See also: 🔍

Entryinfo

Created: 05/19/2018 10:03
Updated: 03/14/2023 12:22
Changes: 05/19/2018 10:03 (93), 02/07/2020 13:53 (6), 03/14/2023 12:15 (4), 03/14/2023 12:22 (12)
Complete: 🔍
Cache ID: 216::103

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