title: Cisco Adaptive Security Appliance Software VPN Denial of Service Vulnerability
description: A vulnerability in the remote access VPN session manager of Cisco Adaptive Security Appliance (ASA) Software could allow a unauthenticated, remote attacker to cause a denial of service (DoS) condition on the remote access VPN services. The vulnerability is due to an issue with the remote access VPN session manager. An attacker could exploit this vulnerability by requesting an excessive number of remote access VPN sessions. An exploit could allow the attacker to cause a DoS condition.
problem types: CWE-404
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
}
metrics:
cvssV3_0: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: LOW
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: NONE
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
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.
workarounds: Administrators can use the vpn-sessiondb logoff all command on the affected device to temporarily clear the condition or reboot the device.