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) …
Impact
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.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Cisco | Secure Firewall Management Center | Version 3.1.0.1 |
| Cisco | Secure Firewall Threat Defense | from 6.4.0 before 6.4.0.13 from 6.6.0 before 6.6.5.1 from 6.7.0 before 6.7.0.3 from 7.0.0 before 7.0.1 |
| Cisco | Snort | from 3.0.0.0 before 3.1.0.100 |