PT-2023-4731 · Cisco · Cisco Nx-Os+1

Published 2023-08-23 · Updated 2024-01-25 · CVE-2023-20168

Positive Technologies (AI Summary)

CVSS v3.1

7.1

High

Base vector

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

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

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.

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

DoS

RCE

Buffer Overflow

Improper Resource Release

Weakness Enumeration

CWE-20

CWE-120

CWE-404

Related Identifiers

BDU:2023-05163

CVE-2023-20168

Affected Products

Cisco Nx-Os

Cisco Nexus

References · 6

• https://osv.dev/vulnerability/CVE-2023-20168 · Vendor Advisory
• https://bdu.fstec.ru/vul/2023-05163 · Security Note
• https://nvd.nist.gov/vuln/detail/CVE-2023-20168 · Security Note
• https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-nxos-remoteauth-dos-XB6pv74m · Vendor Advisory
• https://t.me/cibsecurity/69083 · Telegram Post
• https://t.me/cvenotify/57146 · Telegram Post