Knot Resolver up to 5.3.1 Wildcard iteration

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability identified as problematic has been detected in Knot Resolver up to 5.3.1. Affected by this issue is some unknown functionality of the component Wildcard Handler. This manipulation causes iteration. This vulnerability is registered as CVE-2021-40083. Remote exploitation of the attack is possible. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability has been found in Knot Resolver up to 5.3.1 and classified as problematic. Affected by this vulnerability is some unknown functionality of the component Wildcard Handler. The manipulation with an unknown input leads to a iteration vulnerability. The CWE definition for the vulnerability is CWE-834. The product performs an iteration or loop without sufficiently limiting the number of times that the loop is executed. As an impact it is known to affect availability.

The weakness was published 08/25/2021. It is possible to read the advisory at gitlab.nic.cz. This vulnerability is known as CVE-2021-40083. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

Upgrading to version 5.3.2 eliminates this vulnerability. The upgrade is hosted for download at gitlab.nic.cz.

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Productinfo

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Iteration
CWE: CWE-834 / CWE-404
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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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: Knot Resolver 5.3.2

Timelineinfo

08/24/2021 🔍
08/25/2021 +1 days 🔍
08/25/2021 +0 days 🔍
08/27/2021 +2 days 🔍

Sourcesinfo

Advisory: gitlab.nic.cz
Status: Confirmed

CVE: CVE-2021-40083 (🔍)
GCVE (CVE): GCVE-0-2021-40083
GCVE (VulDB): GCVE-100-181435

Entryinfo

Created: 08/25/2021 11:13
Updated: 08/27/2021 03:14
Changes: 08/25/2021 11:13 (38), 08/27/2021 03:14 (2)
Complete: 🔍
Cache ID: 216::103

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

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