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Although source code is available for the original SSH, various restrictions are imposed on its use and distribution. OpenSSH was created as a fork of Björn Grönvall's OSSH that itself was a fork of Tatu Ylönen's original free SSH 1.2.12 release, [13] which was the last one having a license suitable for forking.
In February 2024, a malicious backdoor was introduced to the Linux build of the xz utility within the liblzma library in versions 5.6.0 and 5.6.1 by an account using the name "Jia Tan". [b] [4] The backdoor gives an attacker who possesses a specific Ed448 private key remote code execution through OpenSSH on the affected Linux
ssh-agent creates a socket and then checks the connections from ssh. Everyone who is able to connect to this socket also has access to the ssh-agent. The permissions are set as in a usual Linux or Unix system. When the agent starts, it creates a new directory in /tmp with restrictive permissions. The socket is located in this directory.
Linux HP-UX Java macOS Solaris Windows Bitvise SSH Server Bitvise Limited 2001 Windows 9.32 [2] [3] 2023-12-20 Proprietary [a] CopSSH: Itefix 2003-08-12 Cygwin 7.10.1 [4] 2022-06-21 Proprietary: Windows CrushFTP Server: CrushFTP, LLC 2003-01-01 AIX 10.2.0 [5] 2022-04-05 Proprietary [b] BSD Cygwin Linux HP-UX Java macOS Solaris Windows Dropbear ...
Dropbear is a software package written by Matt Johnston that provides a Secure Shell-compatible server and client. [2] It is designed as a replacement for standard OpenSSH for environments with low memory and processor resources, such as embedded systems.
An SSH client is a software program which uses the secure shell protocol to connect to a remote computer. This article compares a selection of notable clients. This article compares a selection of notable clients.
In 2018 Microsoft began porting the OpenSSH source code to Windows [5] and in Windows 10 version 1709, an official Win32 port of OpenSSH is now available. File managers for UNIX-like systems (e.g. Konqueror ) can use the FISH protocol to provide a split-pane GUI with drag-and-drop.
Perhaps the most widely used SCP program is the OpenSSH command line scp program, which is provided in most SSH implementations. The scp program is the secure analog of the rcp command. The scp program must be part of all SSH servers that want to provide SCP service, as scp functions as SCP server too.