Ensure SSH version 2 is still enabled and banner changes to a newer string (e.g., SSH-2.0-Cisco-1.26 or higher).
The identification string SSH-2.0-Cisco-1.25 is a common sight for network engineers, appearing during SSH connections to a vast number of Cisco switches and routers. It is not merely a version number; it's a digital banner announced by the SSH server on a device as soon as a TCP connection is established on port 22. ssh-2.0-cisco-1.25 vulnerability
Weak algorithms could allow for the decryption of session data. Ensure SSH version 2 is still enabled and
Many Cisco devices using the SSH stack were found to be vulnerable to the Terrapin attack . Weak algorithms could allow for the decryption of
: Represents the core protocol, verifying that the target enforces Secure Shell Version 2 rather than the deprecated, insecure Version 1.
: In situations like CVE-2020-3200, an internal state within the SSH state machine is handled incorrectly during an active connection.
The core issue is a vulnerability in the SSHv2 implementation of Cisco IOS software. A crafted SSHv2 packet can cause the device to crash or reload.