Vulnerability !!better!! - Ssh20cisco125

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

! Define an object-group for allowed bastion hosts object-group network ADMIN_BASTIONS host 10.100.45.10 host 10.100.45.11 ! ! Apply restricted access to virtual terminal lines access-list 125 permit tcp object-group ADMIN_BASTIONS any eq 22 access-list 125 deny tcp any any eq 22 ! line vty 0 4 access-class 125 in transport input ssh Use code with caution. 2. Implementation of Control Plane Policing (CoPP)

The "ssh20cisco125" scenario is considered high-risk for several key reasons: ssh20cisco125 vulnerability

There is no official vulnerability record or CVE known as "." This identifier appears to be a specific string used in vulnerability scanner results (such as Qualys , Tenable/Nessus , or Rapid7 ) to flag that a Cisco device is running SSH version 1.25 or is susceptible to a specific SSH protocol-level flaw.

Ensure that the device is strictly configured to use SSHv2 and that legacy, insecure protocol versions are entirely disabled. ip ssh version 2 ip ssh time-out 60

The vulnerability is essentially a flaw in the —a component used by many modern network applications, including several Cisco platforms—to handle SSH connections.

In severe cases, flaws within SSH message handling during the initial handshake or authentication phases allow malicious payloads to bypass access controls altogether. This can lead to unauthenticated Remote Code Execution (RCE) or local privilege escalation to a root or level 15 administrator account. 3. Persistent Denial of Service (DoS) how it works

This article provides a comprehensive breakdown of what SSH20Cisco125 likely refers to, how it works, which systems are vulnerable, and step-by-step remediation strategies.

A newly identified/critical vulnerability tracked as is affecting specific Cisco IOS, IOS-XE, and NX-OS devices running SSH services.