#VU20487 Input validation error in Cisco NX-OS - CVE-2019-1968

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Main Vulnerability Database Vulnerabilities #VU20487

#VU20487 Input validation error in Cisco NX-OS - CVE-2019-1968

Published: August 30, 2019


Vulnerability identifier: #VU20487
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1968
CWE-ID: CWE-20
Exploitation vector: Remote access
Exploit availability: No public exploit available
Vulnerable software:
Cisco NX-OS
Software vendor:
Cisco Systems, Inc

Description

The vulnerability allows a remote attacker to cause a system process to unexpectedly restart.

The vulnerability exists due to incorrect validation of the HTTP header of a request that is sent to the NX-API feature. A remote attacker can send a specially crafted HTTP request to the NX-API and cause a denial of service (DoS) condition in the NX-API service; however, the NX-OS device itself would still be available and passing network traffic.

This vulnerability affects the following products that are running a Cisco NX-OS Software and had the NX-API feature enabled:
  • MDS 9000 Series Multilayer Switches
  • Nexus 3000 Series Switches
  • Nexus 3500 Platform Switches
  • Nexus 3600 Platform Switches
  • Nexus 5500 Platform Switches
  • Nexus 5600 Platform Switches
  • Nexus 6000 Series Switches
  • Nexus 7000 Series Switches
  • Nexus 7700 Series Switches
  • Nexus 9000 Series Switches in standalone NX-OS mode
  • Nexus 9500 R-Series Switching Platform

Remediation

Install updates from vendor's website.

External links