Input Validation Flaw in Cisco NX-OS Enhances Risk of Denial of Service
CVE-2023-20168

6.5MEDIUM

Key Information:

Vendor

Cisco
Status
Cisco NX-OS Software
Vendor
CVE Published:
23 August 2023

What is CVE-2023-20168?

A vulnerability exists within the TACACS+ and RADIUS remote authentication processes in Cisco NX-OS Software. It stems from improper input validation during authentication attempts when the directed request option is enabled. An unauthenticated, local attacker could exploit this flaw by submitting a specially crafted string at the login prompt, prompting the affected device to unexpectedly reload. This scenario could ultimately lead to a denial of service (DoS) state, impacting device availability.

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Affected Version(s)

Cisco NX-OS Software 4.2(1)SV1(4)

Cisco NX-OS Software 4.2(1)SV1(4a)

Cisco NX-OS Software 4.2(1)SV1(4b)

References

https://sec.cloudapps.cisco.com/security/center/content/C...

CVSS V3.1

Score:
6.5
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
Availability:
None
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

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