CVE-2021-40116
published 2021-10-27CVE-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)…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
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
8 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_firepower_threat_defense_software | — | — |
| cisco | firepower_threat_defense | >= 6.4.0 < 6.4.0.13 | 6.4.0.13 |
| cisco | firepower_threat_defense | >= 6.6.0 < 6.6.5.1 | 6.6.5.1 |
| cisco | firepower_threat_defense | >= 6.7.0 < 6.7.0.3 | 6.7.0.3 |
| cisco | firepower_threat_defense | >= 7.0.0 < 7.0.1 | 7.0.1 |
| cisco | products_snort_rule | — | — |
| cisco | secure_firewall_management_center | — | — |
| cisco | snort | >= 3.0.0.0 < 3.1.0.100 | 3.1.0.100 |