CVE-2025-4041

In Optigo Networks ONS NC600 versions 4.2.1-084 through 4.7.2-330, an attacker could connect with the device's ssh server and utilize the system's components to perform OS command executions...

Erlang/OTP security vulnerabilities

Erlang/OTP is an Erlang/OTP open source library written in JavaScript that handles handling exceptions. The library catches exceptions raised by the node.js built-in API. A security vulnerability exists in Erlang/OTP that stems from SSH not strictly enforcing the KEX handshake, which could lead t...

CVE-2025-46712: Expected Behavior Violation

Erlang/OTP is a set of libraries for the Erlang programming language. In versions prior to OTP-27.3.4 for OTP-27, OTP-26.2.5.12 for OTP-26, and OTP-25.3.2.21 for OTP-25, Erlang/OTP SSH fails to enforce strict KEX handshake hardening measures by allowing optional messages to be exchanged. This...

PT-2025-20412

Name of the Vulnerable Software and Affected Versions Erlang/OTP versions prior to OTP-27.3.4 Erlang/OTP versions prior to OTP-26.2.5.12 Erlang/OTP versions prior to OTP-25.3.2.21 Description The issue concerns Erlang/OTP SSH failing to enforce strict KEX handshake hardening measures by allowing...

CVE-2025-36546

On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH...

CVE-2025-36546

CVE-2025-36546 affects F5OS (Aplpliance mode) where SSH key-based login remains allowed for the root user even after Appliance Mode is enabled, enabling potential unauthorized access if an attacker possesses the root SSH private key. The F5 advisories/Red Hat/NCSC entries describe the issue as a ...

CVE-2025-36546 F5OS Appliance Mode vulnerability

On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH...

CVE-2025-36546 F5OS Appliance Mode vulnerability

On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH...

openssh bug fix update

An update is available for openssh. This update affects Rocky Linux 8. A Common Vulnerability Scoring System CVSS base score, which gives a detailed severity rating, is available for each vulnerability from the CVE list OpenSSH is an SSH protocol implementation supported by a number of Linux, UNI...

CVE-2025-47203

dbclient in Dropbear SSH before 2025.88 allows command injection via an untrusted hostname argument, because a shell is used...

K000140574: F5OS Appliance Mode vulnerability CVE-2025-36546

Security Advisory Description On an F5OS system, if the root user configures the system to allow login using SSH key-based authentication and later enables appliance mode, the system still allows access using SSH key-based authentication. For an attacker to exploit this vulnerability they must...

python-asyncssh: Rogue Session Attack

A flaw was found in python-synch before the 2.14.1 versions, where the client can log in to the attacker's account without the client being able to detect this. This flaw allows an attacker to control the remote end of the SSH session completely, resulting in a complete break of the confidentiali...

CVE-2025-47203

dbclient in Dropbear SSH before 2025.88 allows command injection via an untrusted hostname argument, because a shell is used...

PT-2025-20304

Name of the Vulnerable Software and Affected Versions F5OS affected versions not specified Description The issue allows access via SSH key-based authentication even after Appliance Mode is enabled, if the root user had previously configured the system to allow such login. An attacker would need t...

CVE-2025-36546: Incorrect Authorization

On an F5OS system, if the root user had previously configured the system to allow login via SSH key-based authentication, and then enabled Appliance Mode; access via SSH key-based authentication is still allowed. For an attacker to exploit this vulnerability they must obtain the root user's SSH...

CVE-2025-47203: Improper Neutralization of Special Elements used in an OS Command

dbclient in Dropbear SSH before 2025.88 allows command injection via an untrusted hostname argument, because a shell is used...

CVE-2025-47203

dbclient in Dropbear SSH before 2025.88 allows command injection via an untrusted hostname argument, because a shell is used...

Enable PAM Authentication

Pluggable Authentication Modules PAM on the Linux platform provides a series of open source shared library files .so files. You can flexibly control the authentication process by configuring parameters. After PAM authentication is configured for SSH, the user authentication management module of t...

Configure Proper SSH Key Exchange Algorithms

Key exchange is a process in which two parties exchange keys to allow the use of an encryption algorithm. A secure key exchange algorithm enables them to securely exchange keys, thereby using encryption algorithms to encrypt messages to be sent and decrypt received messages. Set the SSH key...

Configure a Proper Number of Concurrent Sessions Allowed for a Single SSH Connection

SSH allows a client that supports multiplexing to establish multiple sessions based on a network connection. MaxSessions limits the number of concurrent SSH sessions that can be established for each network connection. This prevents system resources from being occupied by a single connection or a...