What’s Vulnerable › Vulnerabilities

CVE-2020-3255: Cisco Firepower Threat Defense Software Packet Flood Denial of Service Vulnerability

Description

A vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a high rate of IPv4 or IPv6 traffic through an affected device. This traffic would need to match a configured block action in an access control policy. An exploit could allow the attacker to cause a memory exhaustion condition on the affected device, which would result in a DoS for traffic transiting the device, as well as sluggish performance of the management interface. Once the flood is stopped, performance should return to previous states.

Affected products

How to fix

Upgrade to a fixed version: Cisco Firepower Threat Defense Software 6.2.3.16, 6.3.0.6, 6.4.0.9. Check the vendor advisory for mitigations.

References

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