CVE-2021-34781 — Cisco Firepower Threat Defense Software SSH Connections Denial of Service Vulnerability

Description (CNA)

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 (CNA)

Vendor / product	Versions
Cisco / Cisco Adaptive Security Appliance (ASA) Software	affected n/a

CWE

CWE-119

References

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-rUDseW3r

ADP enrichment

CVE

No English description supplied.

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-rUDseW3r

CISA-ADP

No English description supplied.

No references supplied.