PuTTY 0.80 releases: fix the Terrapin vulnerability

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PuTTY is a free and open-source terminal emulator, serial console and network file transfer application. It supports several network protocols, including SCP, SSH, Telnet, rlogin, and raw socket connection. It can also connect to a serial port. The name “PuTTY” has no official meaning.

PuTTY was originally written for Microsoft Windows, but it has been ported to various other operating systems. Official ports are available for some Unix-like platforms, with work-in-progress ports to Classic Mac OS and macOS, and unofficial ports have been contributed to platforms such as Symbian, Windows Mobile and Windows Phone.

Logevent [CC0], via Wikimedia Commons

PuTTY was written and is maintained primarily by Simon Tatham.PuTTY supports many variations on the secure remote terminal, and provides user control over the SSH encryption key and protocol version, alternate ciphers such as AES, 3DES, Arcfour, Blowfish, DES, and Public-key authentication. PuTTY supports SSO through GSSAPI, including user provided GSSAPI DLLs. It also can emulate control sequences from xterm, VT220, VT102 or ECMA-48 terminal emulation, and allows local, remote, or dynamic port forwarding with SSH (including X11 forwarding). The network communication layer supports IPv6, and the SSH protocol supports the zlib@openssh.com delayed compression scheme. It can also be used with local serial port connections.PuTTY comes bundled with command-line SCP and SFTP clients, called “pscp” and “psftp” respectively, and plink, a command-line connection tool, used for non-interactive sessions.PuTTY does not support session tabs directly, but many wrappers are available that do.

Changelog v0.80

  • fix for the Terrapin vulnerability in some SSH protocol extensions (aka CVE-2023-48795)
  • Bug fix: the MSI-installed version of putty.exe can now find its help file again.
  • Bug fix: a server sending non-displaying terminal escape sequences such as ESC[0m now no longer resets the scrollback to the bottom of the window.

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PuTTY is copyright 1997-2019 Simon Tatham.

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