Vulnerability __hot__ | Ssh-2.0-cisco-1.25

Security practitioners often argue whether reports of ssh-2.0-cisco-1.25 are "false positives."

That morning she made a quick plan. First, she isolated the affected device by moving management access to an alternate path and restricting SSH access in the firewall to only her workstation’s IP. She then pulled the exact firmware and configuration versions from the router and compared them against the vendor’s advisory. The advisory described a flaw in certain Cisco SSH implementations where malformed negotiation packets could cause a buffer overflow, allowing unauthenticated attackers to crash the SSH service or execute code. ssh-2.0-cisco-1.25 vulnerability

Currently, the "story" for this version involves two major security concerns: 1. The Terrapin Attack (CVE-2023-48795) Security practitioners often argue whether reports of ssh-2

Devices reporting ssh-2.0-cisco-1.25 often default to outdated Key Exchange (Kex) algorithms, such as diffie-hellman-group1-sha1 . This algorithm uses a 768-bit prime modulus, which is computationally feasible to break with sufficient resources (e.g., a nation-state or well-funded attacker). Modern standards require 2048-bit (group14) or higher. The advisory described a flaw in certain Cisco

Many Cisco devices using the SSH stack were found to be vulnerable to the Terrapin attack .

Legacy SSH implementations were designed in an era when cryptography standards were different. cisco-1.25 often supports: