The device crashes and reloads, resulting in a Denial of Service (DoS) condition. C. Emerging Threats: Erlang/OTP SSH Weaknesses
: Disable SSH version 1 (SSHv1) support if enabled, and enforce the use of SSH version 2 (SSHv2) to avoid a class of legacy protocol attacks.
Router(config)# access-list 10 permit 192.168.1.0 0.0.0.255 Router(config)# line vty 0 4 Router(config-line)# access-class 10 in Router(config-line)# transport input ssh Use code with caution. Step 4: Obfuscate or Disable the Banner (Optional) ssh-2.0-cisco-1.25 vulnerability
The "ssh-2.0-cisco-1.25 vulnerability" is not a single bug but rather a . It tells a story: a Cisco device deployed years ago, likely stable, and forgotten by security teams. While the banner itself does not guarantee compromise, it dramatically increases the attack surface.
The string is not a single specific vulnerability, but rather a standard software banner string emitted by Cisco enterprise devices (running Cisco IOS or IOS XE) when an external system initiates a connection over Secure Shell (SSH) on Port 22. The device crashes and reloads, resulting in a
Would you like a ready-to-use or Ansible playbook to detect and remediate this across a network?
Based on the format Cisco-1.25 , the device likely dates to the mid-2000s. Common SSH vulnerabilities in that era include: Router(config)# access-list 10 permit 192
Understanding the "SSH-2.0-Cisco-1.25" Vulnerability Matrix: Risks, Technical Deep Dive, and Mitigation Strategies
Many devices identifying with this string are vulnerable to the Terrapin vulnerability (prefix truncation attack), which allows a Man-in-the-Middle (MitM) attacker to weaken the security of the connection.