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CVE-2020-3120

A vulnerability in the Cisco Discovery Protocol implementation for Cisco FXOS Software, Cisco IOS XR Software, and Cisco NX-OS Software could allow an unauthen…

Impact

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).

Affected products

VendorProductAffected versions
CiscoFirepower Extensible Operating System
through 2.3.1.173
from 2.6 before 2.6.1.187
from 2.7 before 2.7.1.106
CiscoFxos
Version 2.4
CiscoIos Xr
Versions 5.2.5, 6.4.2, 6.5.3, 6.6.25, 7.0.1
CiscoNx-Os
from 5.2 before 6.2\(29\)
from 7.3 before 8.4\(1a\)
from 5.2 before 5.2\(1\)sv5\(1.3\)
through 5.2
before 5.2\(1\)sv3\(4.1b\)
from 7.0\(3\)f2 before 9.3\(2\)
CiscoUcs Manager
before 3.2\(3m\)
from 4.0 before 4.0\(4g\)

Weakness classification

CWE-190

References