Improper resource management and logic errors during SSH session negotiation.
The most effective remediation is to apply the relevant patch provided by Cisco Support . ssh20cisco125 vulnerability exclusive
Remote and unauthenticated. An attacker does not need valid credentials to crash the device. Improper resource management and logic errors during SSH
If an update is not immediately possible, use a VTY Access Class to restrict SSH access only to trusted management IP addresses. ssh20cisco125 vulnerability exclusive
Deploy edge filters to block port 22 (SSH) traffic from untrusted sources targeting your core infrastructure.
Use CoPP to drop unauthorized SSH packets before they reach the device's route processor.
The vulnerability lies within the server-side SSH implementation. It allows an attacker to send crafted packets during the SSH session establishment phase.