Preview Tool

Cisco Bug: CSCvu15689 - PD IOS-XE shouldn't reply to a validated packet from an unknown src using a dst IP from IKE/IPSec SA

Last Modified

May 28, 2020

Products (1)

  • Cisco IOS

Known Affected Releases


Description (partial)

This is an enhancement to fix the PD part for the corresponding PI enhancement CSCvi70236.

In current IOS/IOS-XE implementation if we receive a packet from an unknown IP address and it is valid in terms of integrity protection, the router will reply to such a packet and use as a destination the IP address from IKE or IPSec SA. Such a behavior may end up in a situation where an SA will never establish or it will introduce asymmetrical traffic flow.

The address of the received ESP/IKE traffic is different compared to the initial IKE/IPSec SA, for example due to NAT changing on the transit network.
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
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.