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CVE-2020-3120

Status Candidate

Overview

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).

Related Files

Cisco Discovery Protocol (CDP) Remote Device Takeover
Posted Feb 5, 2020
Authored by Barak Hadad, Yuval Sarel, Ben Seri | Site armis.com

Armis has discovered five critical, zero-day vulnerabilities in various implementations of the Cisco Discovery Protocol (CDP) that can allow remote attackers to completely take over devices.

tags | advisory, remote, vulnerability, protocol
systems | cisco
advisories | CVE-2020-3110, CVE-2020-3111, CVE-2020-3118, CVE-2020-3119, CVE-2020-3120
SHA-256 | 5e3050fbeb1f22ebf589d261aab1741e8ff40e062b5d1b2a93dee1b7c870f8c4
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