An attacker can send specific protocol messages before authenticating, exploiting a memory or logic error in how the SSH server handles early communication.
The most famous vulnerability associated with this version string is the Cisco "Small SSH" issue. Early implementations of SSH on Cisco IOS had a flaw in the key exchange mechanism. In certain configurations, an attacker could bypass authentication entirely. If a device reports this version string, it is highly likely susceptible to authentication bypass, allowing an attacker to gain administrative access without a password.
Security researchers and automated scanners often flag devices displaying this banner because they may be susceptible to the following high-impact issues:
While ssh-2.0-cisco-1.25 is not a specific CVE (Common Vulnerabilities and Exposures) ID itself, it is a version string found in the protocol banner of legacy Cisco devices. Its presence on a network port is a critical indicator of vulnerability. This article explores why this specific string matters, the underlying weaknesses it represents, and how network administrators can mitigate the risks.
First, let's break down the identifier.
The string is not a vulnerability itself, but rather the SSH banner (software version identifier) typically broadcast by Cisco IOS and IOS XE devices during the initial connection phase.
An attacker can send specific protocol messages before authenticating, exploiting a memory or logic error in how the SSH server handles early communication.
The most famous vulnerability associated with this version string is the Cisco "Small SSH" issue. Early implementations of SSH on Cisco IOS had a flaw in the key exchange mechanism. In certain configurations, an attacker could bypass authentication entirely. If a device reports this version string, it is highly likely susceptible to authentication bypass, allowing an attacker to gain administrative access without a password. ssh-2.0-cisco-1.25 vulnerability
Security researchers and automated scanners often flag devices displaying this banner because they may be susceptible to the following high-impact issues: An attacker can send specific protocol messages before
While ssh-2.0-cisco-1.25 is not a specific CVE (Common Vulnerabilities and Exposures) ID itself, it is a version string found in the protocol banner of legacy Cisco devices. Its presence on a network port is a critical indicator of vulnerability. This article explores why this specific string matters, the underlying weaknesses it represents, and how network administrators can mitigate the risks. Its presence on a network port is a
First, let's break down the identifier.
The string is not a vulnerability itself, but rather the SSH banner (software version identifier) typically broadcast by Cisco IOS and IOS XE devices during the initial connection phase.