CVE-2020-3189
Cisco Secure Firewall Threat Defense
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.
Exploitation status
- A vendor advisory or patch reference has been published.
What the metrics mean
- It is reachable over a network, without needing local access.
- For an attacker who can reach it, no special conditions are needed to exploit it.
- To exploit it, no account is needed.
- Beyond that, no action by a user is required.
Scoring
- CVSS
- 8.6 (v3.1)
- Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H- Weakness
- CWE-400
- Assigned by
- psirt@cisco.com
Dates
- Published
- 2020-05-06
- Last modified
- 2026-08-11
- Sources
- NVD
Affected products
- Cisco Secure Firewall Threat Defense6.2.3.12, 6.2.3.13, 6.2.3.14, 6.2.3.15
- Cisco Asa 5505 Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
- Cisco Asa 5505all versions
- Cisco Asa 5510 Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
- Cisco Asa 5510all versions
- Cisco Asa 5512-X Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
- Cisco Asa 5512-Xall versions
- Cisco Asa 5515-X Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
- Cisco Asa 5515-Xall versions
- Cisco Asa 5520 Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
- Cisco Asa 5520all versions
- Cisco Asa 5525-X Firmware9.9\(2\), 9.9\(2.21\), 9.9\(2.52\), 9.9\(2.55\)
As listed in the NVD configuration data. Not a statement about your estate.