The vulnerability lies within the server-side SSH implementation. It allows an attacker to send crafted packets during the SSH session establishment phase.
To mitigate the SSH20Cisco125 vulnerability, follow these steps: ssh20cisco125 vulnerability exclusive
Set aggressive exec-timeout and timeout login values on your VTY lines to clear hung sessions. The Bottom Line The Bottom Line DH group exchange negotiation Standard
Standard SSH key exchange uses Diffie-Hellman (DH). SSH20CISCO125 resides in the phase. When a vulnerable Cisco IOS or IOS-XE device (versions 12.2 through 15.9) receives a malformed SSH_MSG_KEX_DH_GEX_REQUEST containing a specific 125-byte prime residual, the cryptographic parser enters an undefined state. In some variations, attackers can bypass RSA-based public
In some variations, attackers can bypass RSA-based public key authentication entirely. 4. Affected Products
), a vendor name (Cisco), and a specific vulnerability or exploit index (125)—rather than a standard CVE designation.