cisco-sa-asaftd-tunnel-dos-s6mgkb75: Cisco Secure Firewall Adaptive Security Appliance and Secure Firewall Threat Defense Software Remote Access SSL VPN Tunnel Denial of Service Vulnerability
A vulnerability in the Remote Access SSL VPN service of Cisco Secure Firewall Adaptive Security Appliance (ASA) Software and Cisco Secure Firewall Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause the device to reload unexpectedly, resulting in a denial of service (DoS) condition.This vulnerability is due to logic errors when secondary authentication is configured on a tunnel group. An attacker could exploit this vulnerability by sending a crafted request when connecting to the SSL remote access VPN. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.This advisory is available at the following link:https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-asaftd-tunnel-dos-s6mgkb75
Affected Software
Event History
Frequently Asked Questions
Which deployments are exposed to this issue?
Cisco Secure Firewall ASA and FTD devices are affected when their Remote Access SSL VPN service uses a tunnel group with secondary authentication configured.
Does exploitation require credentials or network proximity?
No credentials are required. An unauthenticated remote attacker can exploit the issue by sending a crafted request while connecting to the SSL remote access VPN.
What is the operational impact of a successful exploit?
A successful exploit can cause the affected device to reload unexpectedly, creating a denial-of-service condition.
What should be done if patching cannot be performed immediately?
The provided information states that no workarounds address this vulnerability. Cisco software updates are available to remediate it.