ISC BIND up to 9.9.3-S1/9.11.35-S1/9.16.21-S1/9.17.18 Resolver denial of service

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.
5.2	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in ISC BIND up to 9.9.3-S1/9.11.35-S1/9.16.21-S1/9.17.18. The affected element is an unknown function of the component Resolver. Executing a manipulation can lead to denial of service. This vulnerability is registered as CVE-2021-25219. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability has been found in ISC BIND up to 9.9.3-S1/9.11.35-S1/9.16.21-S1/9.17.18 (Domain Name Software) and classified as problematic. This vulnerability affects an unknown functionality of the component Resolver. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability.

The weakness was published 10/28/2021. The advisory is shared for download at kb.isc.org. This vulnerability was named CVE-2021-25219 since 01/15/2021. There are neither technical details nor an exploit publicly available. The MITRE ATT&CK project declares the attack technique as T1499.

Upgrading to version 9.11.36, 9.16.22, 9.17.19, 9.11.36-S1 or 9.16.22-S1 eliminates this vulnerability.

Once again VulDB remains the best source for 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: 5.3
VulDB Meta Temp Score: 5.2

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

CNA Base Score: 5.3
CNA Vector (Internet Systems Consortium (ISC)): 🔍

CVSSv2info

AV	AC	Au	C	I	A
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💳	💳	💳	💳	💳	💳
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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
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

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: BIND 9.11.36/9.16.22/9.17.19/9.11.36-S1/9.16.22-S1

Timelineinfo

01/15/2021 🔍
10/28/2021 +285 days 🔍
10/28/2021 +0 days 🔍
11/01/2021 +4 days 🔍

Sourcesinfo

Vendor: isc.org

Advisory: dsa-4994
Status: Confirmed
Confirmation: 🔍

CVE: CVE-2021-25219 (🔍)
GCVE (CVE): GCVE-0-2021-25219
GCVE (VulDB): GCVE-100-185620

Entryinfo

Created: 10/28/2021 13:53
Updated: 11/01/2021 13:05
Changes: 10/28/2021 13:53 (50), 11/01/2021 12:58 (3), 11/01/2021 13:05 (1)
Complete: 🔍
Cache ID: 216::103