Ssh20cisco125 - Vulnerability Exclusive

While modern Cisco NX-OS and IOS XE have faced their own SSH-related vulnerabilities—such as CVE-2023-20050 and CVE-2022-20920—the era vulnerability is distinct because of its legacy nature.

Remote and unauthenticated. An attacker does not need valid credentials to crash the device. ssh20cisco125 vulnerability exclusive

A successful exploit causes the device to experience a "spurious memory access error" and reload. Repeated exploitation can keep the network infrastructure offline indefinitely. Affected Cisco Systems While modern Cisco NX-OS and IOS XE have

Deploy edge filters to block port 22 (SSH) traffic from untrusted sources targeting your core infrastructure. ssh20cisco125 vulnerability exclusive

The vulnerability lies within the server-side SSH implementation. It allows an attacker to send crafted packets during the SSH session establishment phase.

Use CoPP to drop unauthorized SSH packets before they reach the device's route processor.