Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2021-34781

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.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 61.4%
CVSS Severity
CVSS v3 Score 8.6
CVSS v2 Score 7.1
Products affected by CVE-2021-34781


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