Cisco Products Snort3 Rule denial of service

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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7.8$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco Products and classified as problematic. The affected element is an unknown function of the component Snort3 Rule Handler. This manipulation causes denial of service. This vulnerability is tracked as CVE-2021-40116. The attack is possible to be carried out remotely. No exploit exists. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco Products (the affected version unknown). It has been declared as critical. Affected by this vulnerability is an unknown part of the component Snort3 Rule Handler. 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 disclosed 10/28/2021 as cisco-sa-snort-dos-RywH7ezM. It is possible to read the advisory at tools.cisco.com. This vulnerability is known as CVE-2021-40116 since 08/25/2021. 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 eliminates this vulnerability.

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Productinfo

Vendor

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Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.9
VulDB Meta Temp Score: 7.8

VulDB Base Score: 7.5
VulDB Temp Score: 7.2
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 8.6
CNA Vector (Cisco Systems, Inc.): 🔍

CVSSv2info

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

NVD Base Score: 🔍

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: 🔍

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Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/25/2021 🔍
10/28/2021 +64 days 🔍
10/28/2021 +0 days 🔍
07/07/2025 +1348 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-snort-dos-RywH7ezM
Status: Confirmed

CVE: CVE-2021-40116 (🔍)
GCVE (CVE): GCVE-0-2021-40116
GCVE (VulDB): GCVE-100-185587

Entryinfo

Created: 10/28/2021 06:31
Updated: 07/07/2025 16:02
Changes: 10/28/2021 06:31 (48), 11/01/2021 09:03 (19), 07/07/2025 16:02 (15)
Complete: 🔍
Cache ID: 216::103

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