Resource exhaustion in Cisco Asa 5505
CVE-2020-3189
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.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.6 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.018 (78.1th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 78th percentile — 78.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.018 · newest: 0.018 · change: +0.000
Affected products
- Cisco Asa 5505
- Cisco Asa 5505 Firmware — versions 9.9(2.52), 9.9\(2\), 9.9(2.55)
- Cisco Asa 5510
- Cisco Asa 5510 Firmware — versions 9.9(2.52), 9.9\(2\), 9.9(2.55)
- Cisco Asa 5512-X
- Cisco Asa 5512-X Firmware — versions 9.9(2.52), 9.9\(2\), 9.9(2.55)
- Cisco Asa 5515-X
- Cisco Asa 5515-X Firmware — versions 9.9(2.52), 9.9\(2\), 9.9(2.55)
- Cisco Asa 5520
- Cisco Asa 5520 Firmware — versions 9.9(2.52), 9.9\(2\), 9.9(2.55)
Weakness classification (CWE)
References
- tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-dos-… (vendor-advisory, Vendor Advisory)
Frequently asked questions
- What is CVE-2020-3189?
- CVE-2020-3189 is a high-severity vulnerability in Cisco Asa 5505, classified under Uncontrolled Resource Consumption. CVSS score: 8.6/10. Published 2020-05-06.
- How severe is CVE-2020-3189?
- High severity. CVSS v3 base score is 8.6 out of 10.