CVE-2020-3120
Description
A vulnerability in the Cisco Discovery Protocol implementation for Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthenticated, adjacent attacker to cause a reload of an affected device, resulting in a denial of service (DoS) condition. The vulnerability is due to a missing check when the affected software processes Cisco Discovery Protocol messages. An attacker could exploit this vulnerability by sending a malicious Cisco Discovery Protocol packet to an affected device. A successful exploit could allow the attacker to exhaust system memory, causing the device to reload. Cisco Discovery Protocol is a Layer 2 protocol. To exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).
How to fix
- cisco firepower_extensible_operating_system2.6.1.187, 2.7.1.106 or later
- cisco nx-os6.2\(29\), 8.4\(1a\), 5.2\(1\)sv5\(1.3\), 5.2\(1\)sv3\(4.1b\), 9.3\(2\), 7.0\(3\)i7\(8\), 7.3\(6\)n1\(1\), 6.2\(24\), 7.3\(5\)d1\(1\), 8.2\(5\), 8.4\(2\), 13.2\(9b\), 14.2\(1j\) or later
- cisco ucs_manager3.2\(3m\), 4.0\(4g\) or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cisco fxos | 2.4 | — |
| cisco firepower_extensible_operating_system | v ≤ 2.3.1.173, 2.6 ≤ v < 2.6.1.187, 2.7 ≤ v < 2.7.1.106 | 2.6.1.187, 2.7.1.106 |
| cisco ios_xr | 5.2.5, 6.4.2, 6.5.3, 6.6.25, 7.0.1 | — |
| cisco nx-os | 5.2 ≤ v < 6.2\(29\), 7.3 ≤ v < 8.4\(1a\), 5.2 ≤ v < 5.2\(1\)sv5\(1.3\), v ≤ 5.2, v < 5.2\(1\)sv3\(4.1b\), 7.0\(3\)f2 ≤ v < 9.3\(2\), 7.0\(3\)i ≤ v < 7.0\(3\)i7\(8\), v < 7.3\(6\)n1\(1\), v < 6.2\(24\), 7.2 ≤ v < 7.3\(5\)d1\(1\), 8.0 ≤ v < 8.2\(5\), 8.3 ≤ v < 8.4\(2\), v < 13.2\(9b\), 14.0 ≤ v < 14.2\(1j\) | 6.2\(29\), 8.4\(1a\), 5.2\(1\)sv5\(1.3\), 5.2\(1\)sv3\(4.1b\), 9.3\(2\), 7.0\(3\)i7\(8\), 7.3\(6\)n1\(1\), 6.2\(24\), 7.3\(5\)d1\(1\), 8.2\(5\), 8.4\(2\), 13.2\(9b\), 14.2\(1j\) |
| cisco ucs_manager | v < 3.2\(3m\), 4.0 ≤ v < 4.0\(4g\) | 3.2\(3m\), 4.0\(4g\) |
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