A vulnerability in the 802.1X implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a denial of service (DoS) condition on an affected device. The vulnerability is due to incomplete input validation of Extensible Authentication Protocol over LAN (EAPOL) frames. An attacker could exploit this vulnerability by sending a crafted EAPOL frame to an interface on the targeted device. A successful exploit could allow the attacker to cause the Layer 2 (L2) forwarding process to restart multiple times, leading to a system-level restart of the device and a DoS condition. Note: This vulnerability affects only NX-OS devices configured with 802.1X functionality. Cisco Nexus 1000V Switch for VMware vSphere devices are affected in versions prior to 5.2(1)SV3(1.4b). Nexus 3000 Series Switches are affected in versions prior to 7.0(3)I7(4). Nexus 3500 Platform Switches are affected in versions prior to 7.0(3)I7(4). Nexus 2000, 5500, 5600, and 6000 Series Switches are affected in versions prior to 7.3(5)N1(1) and 7.1(5)N1(1b). Nexus 7000 and 7700 Series Switches are affected in versions prior to 8.2(3). Nexus 9000 Series Fabric Switches in ACI Mode are affected in versions prior to 13.2(1l). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions prior to 7.0(3)I7(4).
This vulnerability carries a HIGH severity rating with a CVSS v3.1 score of 7.4, indicating it requires adjacent network access 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 12 products from cisco, from cisco, from cisco and 9 others, organizations running these solutions should prioritize assessment and patching.
First disclosed in 2019, this vulnerability was reported during a period defined by widespread IoT adoption challenges, mobile security concerns, and the emergence of advanced persistent threat (APT) techniques. Contemporary mitigation strategies focused on secure development practices and third-party component vetting.
2019-03-06T22:29:00.340
2024-11-21T04:36:52.873
Modified
CVSSv3.0: 7.4 (HIGH)
AV:A/AC:L/Au:N/C:N/I:N/A:C
6.5
6.9
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Operating System | cisco | nx-os | < 5.2\(1\)sv3\(1.4b\) | Yes |
| Hardware | cisco | nexus_1000v | - | No |
| Operating System | cisco | nx-os | < 7.0\(3\)i7\(4\) | Yes |
| Hardware | cisco | nexus_3000 | - | No |
| Hardware | cisco | nexus_3500 | - | No |
| Operating System | cisco | nx-os | < 7.1\(5\)n1\(1b\) | Yes |
| Hardware | cisco | nexus_2000 | - | No |
| Hardware | cisco | nexus_5500 | - | No |
| Hardware | cisco | nexus_5600 | - | No |
| Hardware | cisco | nexus_6000 | - | No |
| Operating System | cisco | nx-os | < 8.3\(1\) | Yes |
| Hardware | cisco | nexus_7000 | - | No |
| Hardware | cisco | nexus_7700 | - | No |
| Operating System | cisco | nx-os | < 13.2\(1l\) | Yes |
| Hardware | cisco | nexus_9000 | - | No |
| Operating System | cisco | nx-os | < 7.0\(3\)i7\(4\) | Yes |
| Hardware | cisco | nexus_9000_in_standalone_nx-os_mode | - | No |
| Operating System | cisco | nx-os | < 7.3\(5\)n1\(1\) | Yes |
| Hardware | cisco | nexus_2000 | - | No |
| Hardware | cisco | nexus_5500 | - | No |
| Hardware | cisco | nexus_5600 | - | No |
| Hardware | cisco | nexus_6000 | - | No |
| Operating System | cisco | nx-os | < 8.2\(3\) | Yes |
| Hardware | cisco | nexus_7000 | - | No |
| Hardware | cisco | nexus_7700 | - | No |
| Operating System | cisco | nx-os | < 7.3\(3\)d1\(1\) | Yes |
| Hardware | cisco | nexus_7000 | - | No |
| Hardware | cisco | nexus_7700 | - | No |
| Operating System | cisco | nx-os | < 6.2\(20a\) | Yes |
| Hardware | cisco | nexus_7000 | - | No |
| Hardware | cisco | nexus_7700 | - | 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.