CVE-2021-34781 — Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability
A vulnerability in the processing of SSH connections for multi-instance deployments of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attac…
Published: 2021-10-27 · CVSS: 8.6 · CVSS 3.1
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.
Source: CVE Program · Revision 8b16575c39f1e1810c5e863010da073d2d3285e7