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Rewterz Threat Advisory – CVE-2019-1769 – Cisco NX-OS Software Line Card Command Injection Vulnerability

Severity

Medium

Analysis Summary

The vulnerability is due to insufficient validation of arguments passed to a specific CLI command on the affected device. An attacker could exploit this vulnerability by including malicious input as the argument of an affected command. A successful exploit could allow the attacker to execute arbitrary commands on the underlying Linux operating system of an attached line card with elevated privileges. An attacker would need valid administrator credentials to exploit this vulnerability.

Impact

  • Execute arbitrary commands

Affected Vendors

Cisco

Affected Products

  • Cisco Nexus 3000 Series Switches
  • Cisco Nexus 3500 Platform Switches
  • Nexus 3600 Platform Switches
  • Cisco Nexus 9000 Series Switches in standalone NX-OS mode
  • Nexus 9500 R-Series Switching Platform

Remediation

Vendor has released updates for the following products.

For updates visit vendor’s advisory:

https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190515-nxos-linecardinj-1769#fs

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