CVE-2020-3563: Cisco Firepower Threat Defense Software TCP Flood Denial of Service Vulnerability
First published: Wed Oct 21 2020(Updated: )
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 large number of TCP packets to a specific port on an affected device. A successful exploit could allow the attacker to exhaust system memory, which could cause the device to reload unexpectedly. No manual intervention is needed to recover the device after it has reloaded.
Credit: ykramarz@cisco.com
| Affected Software | Affected Version | How to fix |
|---|---|---|
| Cisco Firepower Threat Defense | >=6.3.0<6.3.0.6 | |
| Cisco Firepower Threat Defense | >=6.4.0<6.4.0.10 | |
| Cisco Firepower Threat Defense | >=6.5.0<6.5.0.5 |
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Reference Links
Frequently Asked Questions
What is CVE-2020-3563?
CVE-2020-3563 is a vulnerability in the packet processing functionality of Cisco Firepower Threat Defense (FTD) Software that could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device.
How does CVE-2020-3563 affect Cisco Firepower Threat Defense Software?
CVE-2020-3563 affects Cisco Firepower Threat Defense (FTD) Software versions 6.3.0 to 6.3.0.6, 6.4.0 to 6.4.0.10, and 6.5.0 to 6.5.0.5.
What is the severity of CVE-2020-3563?
The severity of CVE-2020-3563 is rated as high, with a CVSS score of 8.6.
How can an attacker exploit CVE-2020-3563?
An attacker can exploit CVE-2020-3563 by sending specially crafted network packets to the targeted device, causing a DoS condition.
Where can I find more information about CVE-2020-3563?
More information about CVE-2020-3563 can be found on the Cisco Security Advisory page: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-tcp-dos-GDcZDqAf
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