A vulnerability in the TLS handler of Cisco Adaptive Security Appliance (ASA) Software and Cisco Firepower Threat Defense (FTD) Software for Cisco Firepower 1000 Series firewalls could allow an unauthenticated, remote attacker to gain access to sensitive information. The vulnerability is due to improper implementation of countermeasures against the Bleichenbacher attack for cipher suites that rely on RSA for key exchange. An attacker could exploit this vulnerability by sending crafted TLS messages to the device, which would act as an oracle and allow the attacker to carry out a chosen-ciphertext attack. A successful exploit could allow the attacker to perform cryptanalytic operations that may allow decryption of previously captured TLS sessions to the affected device. To exploit this vulnerability, an attacker must be able to perform both of the following actions: Capture TLS traffic that is in transit between clients and the affected device Actively establish a considerable number of TLS connections to the affected device
This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.3, 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 limited data confidentiality, for affected systems. Impacting 7 products from cisco, from cisco, from cisco and 4 others, organizations running these solutions should prioritize assessment and patching.
Reported in 2020, 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.
2020-10-21T19:15:18.967
2024-11-21T05:31:21.627
Modified
CVSSv3.1: 5.3 (MEDIUM)
AV:N/AC:M/Au:N/C:P/I:N/A:N
8.6
2.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | firepower_threat_defense | < 6.4.0.10 | Yes |
| Operating System | cisco | firepower_threat_defense | < 6.5.0.5 | Yes |
| Operating System | cisco | firepower_threat_defense | < 6.6.1 | Yes |
| Hardware | cisco | firepower_1000 | - | No |
| Hardware | cisco | firepower_1010 | - | No |
| Hardware | cisco | firepower_1120 | - | No |
| Hardware | cisco | firepower_1140 | - | No |
| Hardware | cisco | firepower_1150 | - | No |
| Operating System | cisco | adaptive_security_appliance_software | < 9.13.1.13 | Yes |
| Operating System | cisco | adaptive_security_appliance_software | < 9.14.1.30 | Yes |
| Hardware | cisco | firepower_1000 | - | No |
| Hardware | cisco | firepower_1010 | - | No |
| Hardware | cisco | firepower_1120 | - | No |
| Hardware | cisco | firepower_1140 | - | No |
| Hardware | cisco | firepower_1150 | - | 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.