CVE-2021-40116
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.
- Score
- CVSS 3.1 8.6 High
- Status
- Modified - psirt@cisco.com
- Published
- 2021-10-27
- Last modified
- 2024-11-07
- Weaknesses
- CWE-241
Affected products
- Cisco Firepower Threat Defense Software (Cisco)
- Secure Firewall Management Center (Cisco)
- Secure Firewall Threat Defense (Cisco)
- Snort (Cisco)
References
- https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-snort-dos-RywH7ezM
