title: Cisco Adaptive Security Appliance Software and Firepower Threat Defense Software WebVPN Denial of Service Vulnerability
description: A vulnerability in the WebVPN service of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software could allow an authenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper management of authenticated sessions in the WebVPN portal. An attacker could exploit this vulnerability by authenticating with valid credentials and accessing a specific URL in the WebVPN portal. A successful exploit could allow the attacker to cause the device to reload, resulting in a temporary DoS condition.
problem types: CWE-399
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: 7.7
baseSeverity: HIGH
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: LOW
scope: CHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:L/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.