CVE-2021-34781
published 2021-10-27CVE-2021-34781: A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an…
high7.5CVSS 3.1
AVNACLPRNUINSUCNINAH
A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on the affected device. This vulnerability is due to a lack of proper error handling when an SSH session fails to be established. An attacker could exploit this vulnerability by sending a high rate of crafted SSH connections to the instance. A successful exploit could allow the attacker to cause resource exhaustion, which causes a DoS condition on the affected device. The device must be manually reloaded to recover.
Affected
22 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| cisco | cisco_adaptive_security_appliance_software | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_management_center_virtual_appliance | — | — |
| cisco | firepower_threat_defense | — | — |
| cisco | firepower_threat_defense | >= 6.3.0 < 6.4.0.13 | 6.4.0.13 |
| cisco | firepower_threat_defense | >= 6.5.0 < 6.6.5 | 6.6.5 |
| 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 | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |
| cisco | sourcefire_defense_center | — | — |