Ssh20cisco125 Vulnerability [best] Official

configure terminal crypto key zeroize rsa ! WARNING: This removes all existing RSA keys – do this out-of-hours crypto key generate rsa modulus 2048

Upgrade to Unified CM 15SU3 (released July 2025) or the latest security patch. 2. Erlang/OTP SSH Remote Code Execution (CVE-2025-32433) ssh20cisco125 vulnerability

access-list 10 permit 192.168.1.0 0.0.0.255 access-list 10 deny any line vty 0 4 access-class 10 in transport input ssh configure terminal crypto key zeroize rsa

% Key pair was generated at: 00:00:00 UTC Jan 1 2015 Key name: myrouter.cisco.com Storage Device: private-config Usage: General Purpose Key Key Data: Modulus Length (bits): 1000 <--- DANGER Key is not exportable. The Fix: Force the device to use only SSH version 2

Devices running IOS-XE 16.x and later with RSA key length >= 2048 are not vulnerable.

SSH v1 is fundamentally insecure and vulnerable to Man-in-the-Middle (MitM) attacks, specifically the "SSH-1 CRC-32 compensation attack" (CVE-1999-0634). The Fix: Force the device to use only SSH version 2. conf t ip ssh version 2 Use code with caution. Copied to clipboard 2. Cisco IOS SSH Denial of Service (CVE-2008-1159)

(CUCM) due to static SSH credentials. An unauthenticated remote attacker can gain root access Key-Based Bypass : A logic error in the SSH stack of Cisco Secure Firewall ASA