Cisco Integrated Services Router Snort Detection Engine allocation of resources

CVSS Meta Temp Score
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CTI Interest Score
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6.7$0-$5k0.00

Summaryinfo

A vulnerability classified as problematic has been found in Cisco Integrated Services Router, Catalyst, Cloud Services Router and Integrated Services Virtual Router. This affects an unknown part of the component Snort Detection Engine. Performing a manipulation results in allocation of resources. This vulnerability was named CVE-2021-40114. The attack may be initiated remotely. There is no available exploit. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, was found in Cisco Integrated Services Router, Catalyst, Cloud Services Router and Integrated Services Virtual Router (Router Operating System) (version now known). This affects some unknown processing of the component Snort Detection Engine. The manipulation with an unknown input leads to a allocation of resources vulnerability. CWE is classifying the issue as CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. This is going to have an impact on availability.

The weakness was presented 10/28/2021 as cisco-sa-snort-dos-s2R7W9UU. It is possible to read the advisory at tools.cisco.com. This vulnerability is uniquely identified as CVE-2021-40114 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.

The vulnerability scanner Nessus provides a plugin with the ID 262843 (Linux Distros Unpatched Vulnerability : CVE-2021-40114), which helps to determine the existence of the flaw in a target environment.

Upgrading eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (262843). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

Vendor

Name

License

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 6.7
VulDB Meta Temp Score: 6.7

VulDB Base Score: 5.9
VulDB Temp Score: 5.7
VulDB Vector: 🔍
VulDB Reliability: 🔍

NVD Base Score: 7.5
NVD Vector: 🔍

CNA Base Score: 6.8
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: Allocation of resources
CWE: CWE-770 / CWE-400 / 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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Nessus ID: 262843
Nessus Name: Linux Distros Unpatched Vulnerability : CVE-2021-40114

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 🔍
09/10/2025 +1413 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: cisco-sa-snort-dos-s2R7W9UU
Status: Confirmed

CVE: CVE-2021-40114 (🔍)
GCVE (CVE): GCVE-0-2021-40114
GCVE (VulDB): GCVE-100-185583

Entryinfo

Created: 10/28/2021 06:28
Updated: 09/10/2025 20:40
Changes: 10/28/2021 06:28 (49), 11/01/2021 08:40 (1), 11/01/2021 08:41 (18), 09/10/2025 20:40 (16)
Complete: 🔍
Cache ID: 216::103

Be aware that VulDB is the high quality source for vulnerability data.

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