CVE-2020-3562: Cisco Firepower 2100 Series SSL/TLS Inspection Denial of Service Vulnerability
First published: Wed Oct 21 2020(Updated: )
A vulnerability in the SSL/TLS inspection of Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 2100 Series firewalls could allow an unauthenticated, remote attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to improper input validation for certain fields of specific SSL/TLS messages. An attacker could exploit this vulnerability by sending a malformed SSL/TLS message through an affected device. A successful exploit could allow the attacker to cause the affected device to reload, resulting in a DoS condition. 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 | |
| Cisco Firepower Threat Defense | =6.4.0 | |
| Cisco Firepower Threat Defense | =6.5.0 | |
| Cisco Firepower 2110 | ||
| Cisco Firepower 2120 | ||
| Cisco Firepower 2130 | ||
| Cisco Firepower 2140 |
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Reference Links
Frequently Asked Questions
What is the vulnerability ID?
The vulnerability ID is CVE-2020-3562.
What is the severity of CVE-2020-3562?
The severity of CVE-2020-3562 is high with a CVSS score of 8.6.
Which software is affected by CVE-2020-3562?
Cisco Firepower Threat Defense (FTD) Software versions 6.3.0, 6.4.0, and 6.5.0 are affected by CVE-2020-3562.
How can an attacker exploit CVE-2020-3562?
An attacker can exploit CVE-2020-3562 by sending specially crafted SSL/TLS packets to the affected device's SSL/TLS inspection feature.
Is there a fix available for CVE-2020-3562?
Yes, Cisco has released software updates to address the vulnerability. Please refer to the Cisco Security Advisory for more information.
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- version/cisco firepower threat defense/6.4.0
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- canonical/cisco firepower 2110
- canonical/cisco firepower 2120
- canonical/cisco firepower 2130
- canonical/cisco firepower 2140