CVE-2021-40114
Description
Multiple Cisco products are affected by a vulnerability in the way the Snort detection engine processes ICMP traffic 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 memory resource management while the Snort detection engine is processing ICMP packets. An attacker could exploit this vulnerability by sending a series of ICMP packets through an affected device. A successful exploit could allow the attacker to exhaust resources on the affected device, causing the device to reload.
How to fix
- snort snort2.9.18 or later
- cisco secure_firewall_threat_defense6.4.0.12, 6.6.3, 6.7.0.2 or later
- cisco unified_threat_defense16.12.6, 17.3.4a, 17.4.2 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| snort snort | 2.0.0 ≤ v < 2.9.18 | 2.9.18 |
| cisco secure_firewall_management_center | 2.9.14.0, 2.9.15, 2.9.16, 2.9.17 | — |
| cisco secure_firewall_threat_defense | v < 6.4.0.12, 6.5.0 ≤ v < 6.6.3, 6.7.0 ≤ v < 6.7.0.2 | 6.4.0.12, 6.6.3, 6.7.0.2 |
| cisco unified_threat_defense | 16.12 ≤ v < 16.12.6, 17.3 ≤ v < 17.3.4a, 17.4 ≤ v < 17.4.2 | 16.12.6, 17.3.4a, 17.4.2 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.