title: Cisco Adaptive Security Appliance Software and Cisco Firepower Threat Defense Software TCP Timer Handling Denial of Service Vulnerability
description: A vulnerability in the TCP processing engine of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause an affected device to reload, resulting in a denial of service (DoS) condition. The vulnerability is due to the improper handling of TCP traffic. An attacker could exploit this vulnerability by sending a specific sequence of packets at a high rate through an affected device. A successful exploit could allow the attacker to temporarily disrupt traffic through the device while it reboots.
problem types: CWE-20
affected:
{
product: Cisco Adaptive Security Appliance (ASA) Software
vendor: Cisco
versions:
lessThan: 9.4.4.34, status: affected, version: unspecified, versionType: custom
lessThan: 9.6.4.25, status: affected, version: unspecified, versionType: custom
lessThan: 9.8.4, status: affected, version: unspecified, versionType: custom
lessThan: 9.9.2.50, status: affected, version: unspecified, versionType: custom
lessThan: 9.10.1.17, status: affected, version: unspecified, versionType: custom
}
{
product: Cisco Firepower Threat Defense (FTD) Software
vendor: Cisco
versions:
lessThan: 6.2.3.12, status: affected, version: unspecified, versionType: custom
lessThan: 6.3.0.3, status: affected, version: unspecified, versionType: custom
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
version: 3.0
]
exploits: The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory.