CVE-2020-3562
HIGHCisco Firepower Threat Defense - Denial of Service via Malformed SSL/TLS Message
Title source: llmDescription
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.
References (1)
Core 1
Core References
Vendor Advisory vendor-advisory
x_refsource_cisco
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-ftd-ssl-dcrpt-dos-RYEkX4yy
Scores
CVSS v3
8.6
EPSS
0.0088
EPSS Percentile
75.6%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
none
Automatable
yes
Technical Impact
partial
Details
CWE
CWE-119
Status
published
Products (3)
cisco/firepower_threat_defense
6.3.0
cisco/firepower_threat_defense
6.4.0
cisco/firepower_threat_defense
6.5.0
Published
Oct 21, 2020
Tracked Since
Feb 18, 2026