PT-2020-1987 · Cisco · Cisco Nx-Os+2

Published 2020-02-26 · Updated 2023-04-20 · CVE-2020-3172

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions Cisco FXOS Software and Cisco NX-OS Software (affected versions not specified)

Description A vulnerability in the Cisco Discovery Protocol feature could allow an unauthenticated, adjacent attacker to execute arbitrary code as root or cause a denial of service (DoS) condition on an affected device. The vulnerability exists because of insufficiently validated Cisco Discovery Protocol packet headers. An attacker could exploit this vulnerability by sending a crafted Cisco Discovery Protocol packet to a Layer 2-adjacent affected device. A successful exploit could allow the attacker to cause a buffer overflow that could allow the attacker to execute arbitrary code as root or cause a DoS condition on the affected device. Note that Cisco Discovery Protocol is a Layer 2 protocol, and to exploit this vulnerability, an attacker must be in the same broadcast domain as the affected device (Layer 2 adjacent).

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

DoS

RCE

Weakness Enumeration

CWE-20

Related Identifiers

BDU:2020-01304

CVE-2020-3172

Affected Products

Cisco Fxos

Cisco Nx-Os

Cisco Nexus

References · 7

• https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-fxos-nxos-cdp · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2020-3172 · Vendor Advisory
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200226-fxos-nxos-cdp · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2020-3172 · Security Note
• https://bdu.fstec.ru/vul/2020-01304 · Security Note
• https://cxsecurity.com/cveshow/CVE-2020-3172 · Note
• https://t.me/cvenotify/48725 · Telegram Post