#VU20491 Resource exhaustion in Cisco NX-OS - CVE-2019-1965

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Main Vulnerability Database Vulnerabilities #VU20491

#VU20491 Resource exhaustion in Cisco NX-OS - CVE-2019-1965

Published: August 30, 2019


Vulnerability identifier: #VU20491
Vulnerability risk: Medium
CVSSv4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green
CVE-ID: CVE-2019-1965
CWE-ID: CWE-400
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 unexpected system behaviors and crashes.

The vulnerability exists in the Virtual Shell (VSH) session management due to the VSH process not being properly deleted when a remote management connection to the device is disconnected. A remote authenticated attacker can repeatedly perform a remote management connection to the device and terminate the connection in an unexpected manner and cause the VSH processes to fail to delete, which can lead to a system-wide denial of service (DoS) condition.

This vulnerability affects the following products that are running a Cisco NX-OS Software:

  • 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
  • UCS 6200 Series Fabric Interconnects
  • UCS 6300 Series Fabric Interconnects



Remediation

Install updates from vendor's website.

External links