Resource exhaustion in Cisco Asa 5505
CVE-2020-3255
A vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to inefficient memory management. An attacker could exploit this vulnerability by sending a high rate of IPv4 or IPv6 traffic through an affected device. This traffic would need to match a configured block action in an access control policy. An exploit could allow the attacker to cause a memory exhaustion condition on the affected device, which would result in a DoS for traffic transiting the device, as well as sluggish performance of the management interface. Once the flood is stopped, performance should return to previous states.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/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 9.10\(1.3\), 9.10(1.3)
- Cisco Asa 5510
- Cisco Asa 5510 Firmware — versions 9.10\(1.3\), 9.10(1.3)
- Cisco Asa 5512-X
- Cisco Asa 5512-X Firmware — versions 9.10\(1.3\), 9.10(1.3)
- Cisco Asa 5515-X
- Cisco Asa 5515-X Firmware — versions 9.10\(1.3\), 9.10(1.3)
- Cisco Asa 5520
- Cisco Asa 5520 Firmware — versions 9.10\(1.3\), 9.10(1.3)
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-2020-3255?
- CVE-2020-3255 is a high-severity vulnerability in Cisco Asa 5505, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2020-05-06.
- How severe is CVE-2020-3255?
- High severity. CVSS v3 base score is 7.5 out of 10.