8.6
High
CVE-2021-40116 Multiple Cisco products are affected by a vulnerability in Snort rules that could allow an unauthenticated, remote…
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.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Cisco Firepower Threat Defense Software | Versions not published |
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