Ssh20cisco125 Vulnerability | AUTHENTIC |

  • IDS/IPS signatures:
  • Host-based:

    • If you have not patched your Cisco IOS XE devices recently, you must take action immediately.

    If you do not require the Web UI for management, disable it. This removes the attack vector for the initial exploitation. ssh20cisco125 vulnerability

    Command: no ip http server and no ip http secure-server IDS/IPS signatures:

    Using ssh-mitm or a custom script, the attacker can intercept a new SSH connection, present the factored private key, and transparently proxy traffic. The admin sees a normal SSH prompt, but all commands are logged. Host-based:

    To understand the threat, let’s parse the keyword:

    Thus, SSH20Cisco125 describes a vulnerability where Cisco devices, using a weak 1000-bit RSA key for SSHv2, allow an attacker to recover the private key, decrypt past sessions, or man-in-the-middle (MITM) active connections.

    Schedule quarterly RSA key regeneration for all network devices.

    ip ssh version 2
ip ssh time-out 60
ip ssh authentication-retries 3
ip ssh server algorithm encryption aes256-ctr aes192-ctr
ip ssh server algorithm mac hmac-sha2-256
ip ssh server algorithm hostkey rsa-sha2-512
no ip ssh server algorithm hostkey rsa-sha1   ! Disable weak