Vulnerability Monitor

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CVE-2019-1594

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).

Published

2019-03-06T22:29:00.340

Last Modified

2024-11-21T04:36:52.873

Status

Modified

Source

[email protected]

Severity

CVSSv3.0: 7.4 (HIGH)

CVSSv2 Vector

AV:A/AC:L/Au:N/C:N/I:N/A:C

  • Access Vector: ADJACENT_NETWORK
  • Access Complexity: LOW
  • Authentication: NONE
  • Confidentiality Impact: NONE
  • Integrity Impact: NONE
  • Availability Impact: COMPLETE
Exploitability Score

6.5

Impact Score

6.9

Weaknesses
  • Type: Secondary
    CWE-264
  • Type: Primary
    CWE-20
Affected Vendors & Products
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
References