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VULNERABILITIES

CVE-2021-40116 Details

Description

Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.The vulnerability is due to improper handling of the Block with Reset or Interactive Block with Reset actions if a rule is configured without proper constraints. An attacker could exploit this vulnerability by sending a crafted IP packet to the affected device. A successful exploit could allow the attacker to cause through traffic to be dropped. Note: Only products with Snort3 configured and either a rule with Block with Reset or Interactive Block with Reset actions configured are vulnerable. Products configured with Snort2 are not vulnerable.

Metrics

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-RywH7ezM CVEVendor Advisory
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-RywH7ezM [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
NVD-CWE-noinfoInsufficient Information to Classify Weakness[email protected]
CWE-241Improper Handling of Unexpected Data Type[email protected]

Affected Products

ProductVersions
cisco secure firewall management center
3.1.0.1

CPE

  • cpe:2.3:a:cisco:secure_firewall_management_center:3.1.0.1:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
cisco secure firewall threat defense
>= 6.4.0, < 6.4.0.13
>= 6.6.0, < 6.6.5.1
>= 6.7.0, < 6.7.0.3
>= 7.0.0, < 7.0.1

CPE

  • cpe:2.3:a:cisco:secure_firewall_threat_defense:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.
cisco snort
>= 3.0.0.0, < 3.1.0.100

CPE

  • cpe:2.3:a:cisco:snort:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

13 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2021-40116
NVD Published Date:
Oct 27, 2021
NVD Last Modified:
Aug 11, 2026
Source:
[email protected]
CVE-2021-40116 Details - Not Deferred