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Cisco Bug: CSCur38749 - Connection to a non-existent host is consumed/precessed by xTR itself

Last Modified

Sep 11, 2019

Products (8)

  • Cisco Nexus 7000 Series Switches
  • Cisco Nexus 7000 10-Slot Switch
  • Cisco Nexus 7000 4-Slot Switch
  • Cisco Nexus 7700 6-Slot Switch
  • Cisco Nexus 7000 18-Slot Switch
  • Cisco Nexus 7700 18-Slot Switch
  • Cisco Nexus 7000 9-Slot Switch
  • Cisco Nexus 7700 10-Slot Switch

Known Affected Releases


Description (partial)

A vulnerability in Cisco Locator/ID Separation Protocol (LISP) feature of Cisco NX-OS could allow an authenticated, remote attacker to use SSH connection to a non-existent host covered by lisp mobile prefix 
from outside of the DC and get presented with the xTR login prompt.
An attacker still needs to have login credentials for NX-OS device in order to be able to log in.

LISP mobility and lisp enabled interface need to be configured.
Bug details contain sensitive information and therefore require a 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
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