VULNERABILITY INTELLIGENCE

CVE-2023-20168

CVSS score7.1 HIGH
EPSS probability0.24%
CISA KEVNot currently listed
Published2023-08-23
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H

Description

A vulnerability in TACACS+ and RADIUS remote authentication for Cisco NX-OS Software could allow an unauthenticated, local attacker to cause an affected device to unexpectedly reload. This vulnerability is due to incorrect input validation when processing an authentication attempt if the directed request option is enabled for TACACS+ or RADIUS. An attacker could exploit this vulnerability by entering a crafted string at the login prompt of an affected device. A successful exploit could allow the attacker to cause the affected device to unexpectedly reload, resulting in a denial of service (DoS) condition.

Weakness classification

  • CWE-20: Improper Input Validation
  • CWE-120: Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Primary references