A vulnerability in the 802.1X implementation for Cisco NX-OS Software could allow an unauthenticated, adjacent malicious user 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 malicious user 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 before 5.2(1)SV3(1.4b). Nexus 3000 Series Switches are affected in versions before 7.0(3)I7(4). Nexus 3500 Platform Switches are affected in versions before 7.0(3)I7(4). Nexus 2000, 5500, 5600, and 6000 Series Switches are affected in versions before 7.3(5)N1(1) and 7.1(5)N1(1b). Nexus 7000 and 7700 Series Switches are affected in versions before 8.2(3). Nexus 9000 Series Fabric Switches in ACI Mode are affected in versions before 13.2(1l). Nexus 9000 Series Switches in Standalone NX-OS Mode are affected in versions before 7.0(3)I7(4).
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cisco nx-os |
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