Impacted devices can be used to pivot into the internal network, accessing sensitive data or disrupting services.
: Vulnerability scanners often flag SSH version 2.0 if it supports outdated algorithms (like 3DES or SHA-1) or RSA keys under 2048 bits. The Fix :
For variants requiring authentication, a user with minimal read-only privileges (e.g., Level 1 access) can leverage the flaw to gain root administrative privileges (Level 15). This gives the attacker full control over the device configuration, user databases, and access control lists (ACLs). Step-by-Step Technical Remediation
The vulnerability exists in a specific internal API of . It stems from a lack of proper authorization checks and insufficient validation of user-supplied data. Attack Vector: Remote, authenticated. ssh20cisco125 vulnerability
Understanding the "ssh20cisco125" Banner: Is Your Cisco Infrastructure at Risk?
When the administrator initializes an SSHv2 session, the attacker's server intercepts the request. Using the extracted static host key, the attacker successfully matches the cryptographic signature expected by the admin’s client machine.
The identifier refers to a specific SSH protocol banner string used by legacy Cisco networking devices (specifically certain Cisco 1200 series Access Points and Wireless Bridges). While often flagged by modern vulnerability scanners as a "vulnerability," this issue is primarily an Information Disclosure weakness. Impacted devices can be used to pivot into
In many cases, there are no viable workarounds to address this vulnerability without patching the software.
Expected: Modulus Length (bits): 2048
The vulnerability is identified by the following Common Vulnerabilities and Exposures (CVE) identifier: CVE-2022-20686. It affects various Cisco products that run Cisco IOS and IOS XE software, which are the operating systems used on many of Cisco's networking devices, including routers and switches. This gives the attacker full control over the
Older wireless LAN controllers (WLC) still running legacy software branches.
The SSH-20 Cisco 125 vulnerability, also known as CVE-2022-20833, is a security weakness in the Secure Shell (SSH) protocol implementation on certain Cisco devices. Specifically, it affects the Cisco 125 series of switches and routers that run on Cisco IOS and IOS XE software.
: The more critical variations allow unauthenticated network actors to flood or manipulate the handshake sequence before presenting valid credentials.
Trigger a device reload, which prevents new device authentications during the reboot period. 🛠️ Remediation & Mitigation
Improper handling of SSH messages during the authentication sequence.