Ssh-2.0-cisco-1.25 Vulnerability [updated]

An attacker with standard user credentials could exploit this to gain privileged CLI access, effectively escalating their privileges. The vulnerability received a high CVSS v3 base score of 8.0 , underscoring the potential for complete system compromise.

Security scanners do not flag ssh-2.0-cisco-1.25 as a vulnerability itself. They flag it because . ssh-2.0-cisco-1.25 vulnerability

While often overlooked, this banner carries critical information about the device's software base and can be associated with specific security quirks, compatibility issues, and potential reconnaissance risks. This article provides a comprehensive analysis of the SSH-2.0-Cisco-1.25 banner, the nature of the underlying SSH server, its associated vulnerabilities, and the security implications for enterprise networks. An attacker with standard user credentials could exploit

| CVE | Description | Fixed in | |------|-------------|-----------| | | SSHv2 server DoS via crafted SSH packet → reload | IOS 15.1(2)T, 15.2(1)T | | CVE-2015-6274 | Algorithm negotiation bypass → weak encryption forced | IOS 15.4(3)M, 15.5(3)M | | CVE-2016-6376 | Memory exhaustion via multiple SSHv2 key exchanges | IOS 15.5(3)M3 | | CVE-2018-0151 | Remote code execution via SSHv2 (rare, but present in older banners) | IOS 15.6(3)M2 | They flag it because

The SSH-2.0-Cisco-1.25 banner is a relic of a previous era of network management. Seeing this banner on a network device today should be considered a significant operational risk indicator. It almost always points to an older system with potential interoperability issues, weak cryptographic defaults, and a susceptibility to a wide range of unpatched vulnerabilities, including those that enable denial of service, remote command execution, and bypass of security controls.