CVE-2020-3189 Cisco Firepower Threat Defense Software VPN System Logging Denial of Service Vulnerability
Unauthenticated remote attackers can cause a denial of service by repeatedly creating or deleting VPN tunnels, leading to memory depletion and device crashes.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2020-3189?
CVE-2020-3189 is a high-severity denial of service vulnerability in Cisco Secure Firewall Threat Defense, published on 6 May 2020. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
A vulnerability in the VPN System Logging functionality for Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a memory leak that can deplete system memory over time, which can cause unexpected system behaviors or device crashes. The vulnerability is due to the system memory not being properly freed for a VPN System Logging event generated when a VPN session is created or deleted. An attacker could exploit this vulnerability by repeatedly creating or deleting a VPN tunnel connection, which could leak a small amount of system memory for each logging event. A successful exploit could allow the attacker to cause system memory depletion, which can lead to a systemwide denial of service (DoS) condition. The attacker does not have any control of whether VPN System Logging is configured or not on the device, but it is enabled by default.
Which versions are affected by CVE-2020-3189?
It affects 13 products.
Products include Cisco Asa 5505 Firmware, Cisco Asa 5510 Firmware, Cisco Asa 5512-X Firmware, Cisco Asa 5515-X Firmware, Cisco Asa 5520 Firmware, Cisco Asa 5525-X Firmware and 7 more.
How do I fix CVE-2020-3189?
No fix has been published for CVE-2020-3189 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2020-3189 being exploited?
There is no known exploitation of CVE-2020-3189 in the wild and no public exploit code.
Other vulnerabilities in Cisco Secure Firewall Threat Defense
- CVE-2020-3179 Cisco Firepower Threat Defense Software Generic Routing Encapsulation Tunnel IPv6 Denial of Service Vulnerability
- CVE-2020-3283 Cisco Firepower 1000 Series SSL/TLS Denial of Service Vulnerability
- CVE-2020-3255 Cisco Firepower Threat Defense Software Packet Flood Denial of Service Vulnerability
- CVE-2020-3186 Cisco Firepower Threat Defense Software Management Access List Bypass Vulnerability
- CVE-2020-3188 Cisco Firepower Threat Defense Software Management Interface Denial of Service Vulnerability
Sources
Also known as GHSA-hc53-772h-hrgp.