A vulnerability in the software-based SSL/TLS message handler of Cisco Firepower Threat Defense (FTD) Software could allow an unauthenticated, remote attacker to trigger a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to insufficient validation of SSL/TLS messages when the device performs software-based SSL decryption. An attacker could exploit this vulnerability by sending a crafted SSL/TLS message through an affected device. SSL/TLS messages sent to an affected device do not trigger this vulnerability. A successful exploit could allow the attacker to cause a process to crash. This crash would then trigger a reload of the device. No manual intervention is needed to recover the device after the reload.
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 8.6, indicating it can be exploited remotely over the network with relatively low complexity without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts and availability (service disruption) for affected systems. Impacting 16 products from cisco, from cisco, from cisco and 13 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2021, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.
2021-04-29T18:15:08.923
2024-11-21T05:44:16.410
Modified
CVSSv3.1: 8.6 (HIGH)
AV:N/AC:L/Au:N/C:N/I:N/A:C
10.0
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | cisco | firepower_threat_defense | < 6.4.0 | Yes |
| Application | cisco | firepower_threat_defense | < 6.6.0 | Yes |
| Application | cisco | firepower_threat_defense_virtual | - | No |
| Hardware | cisco | asa_5512-x | - | No |
| Hardware | cisco | asa_5515-x | - | No |
| Hardware | cisco | asa_5525-x | - | No |
| Hardware | cisco | asa_5545-x | - | No |
| Hardware | cisco | asa_5555-x | - | No |
| Hardware | cisco | firepower_1010 | - | No |
| Hardware | cisco | firepower_1120 | - | No |
| Hardware | cisco | firepower_1140 | - | No |
| Hardware | cisco | firepower_1150 | - | No |
| Hardware | cisco | firepower_2110 | - | No |
| Hardware | cisco | firepower_2120 | - | No |
| Hardware | cisco | firepower_2130 | - | No |
| Hardware | cisco | firepower_2140 | - | No |
| Hardware | cisco | isa_3000 | - | No |
SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For cisco's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.