Guest

Preview Tool

Cisco Bug: CSCvj59058 - NX-OS Software Cisco Fabric Services over IP Denial of Service Vulnerability

Last Modified

Oct 30, 2019

Products (55)

  • Cisco Nexus 9000 Series Switches
  • Cisco Nexus 9516 Switch
  • Cisco Nexus 3636C-R Switch
  • Cisco Nexus 3548 Switch
  • Cisco Nexus 3548-X Switch
  • Cisco Nexus 92304QC Switch
  • Cisco Nexus 3132Q-V Switch
  • Cisco Nexus 3548-XL Switch
  • Cisco Nexus 31108TC-V Switch
  • Cisco Nexus 3064 Switch
View all products in Bug Search Tool Login Required

Known Affected Releases

7.0(3)I7(1) 9.2(1)

Description (partial)

<B>Symptom:</B>
A vulnerability in the Cisco Fabric Services (CFS) component of Cisco NX-OS Software could allow an unauthenticated, remote attacker to cause process crashes, which can result in a denial of service (DoS) condition on an affected system.

The vulnerability is due to insufficient validation of TCP packets when processed by the Cisco Fabric Services over IP (CFSoIP) feature. An attacker could exploit this vulnerability by sending a crafted CFS TCP packet to an affected device. A successful exploit could allow the attacker to cause process crashes, resulting in a device reload and a DoS condition.

Note: There are three distribution methods that can be configured for CFS. This vulnerability only affects distribution method CFSoIP, which is disabled by default. See the Security Advisory for more information.

Cisco has released software updates that address this vulnerability. There are no workarounds that address this vulnerability.

This advisory is available at the following link:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190828-nxos-fsip-dos

<B>Conditions:</B>
Please refer to the Security Advisory.
Bug details contain sensitive information and therefore require a Cisco.com account to be viewed.

Bug Details Include

  • Full Description (including symptoms, conditions and workarounds)
  • Status
  • Severity
  • Known Fixed Releases
  • Related Community Discussions
  • Number of Related Support Cases
Bug information is viewable for customers and partners who have a service contract. Registered users can view up to 200 bugs per month without a service contract.