PuTTY 0.76

PuTTY is a free implementation of SSH and Telnet for Windows and Unix platforms, along with an xterm terminal emulator.

Tags win32 putty ssh telnet terminal-client file-transfer ftp tftp
License MITL
State beta

Recent Releases

0.7618 Jul 2021 12:45 minor feature: New option to abandon an SSH connection if the server allows you to authenticate in a trivial manner. Windows PuTTY crashed when the 'Use system colours'. Option was used. crash on Windows when using MIT Kerberos together with. Restart Session'. Windows PuTTY leaked named pipes after contacting. Pageant. Windows PuTTY didn't update the window while you held. Down the scrollbar arrow buttons long enough to 'key-repeat'. user colour-palette reconfiguration via 'Change Settings'. Were delayed-action. server colour-palette reconfigurations were sometimes. Lost. a tight loop could occur on reading a truncated private. Key file. the Windows Pageant GUI key list didn't display key. Lengths.
0.7509 May 2021 23:25 minor feature: Security : on Windows, a server could DoS the whole Windows GUI by telling the PuTTY window to change its title repeatedly at high Speed. Pageant now supports loading a key still encrypted, and decrypting. it later by prompting for the passphrase on first use. Upgraded default SSH key fingerprint format to OpenSSH-style SHA-256. Upgraded private key file format to PPK3, with improved passphrase. Hashing and no use of SHA-1. Terminal now supports ESC 9 m for strikethrough text. New protocols: bare ssh-connection layer for use over. Already-secure IPC channels, and SUPDUP for talking to very old Systems such as PDP-10s. PuTTYgen now supports alternative provable-prime generation. Algorithm for RSA and DSA. The Unix tools can now connect directly to a Unix-domain socket.
0.7429 Jun 2020 00:45 minor feature: Security : if an SSH server accepted an offer of a public key And then rejected the signature, PuTTY could access freed memory, if The key had come from an SSH agent.. Security feature: new config option to disable PuTTY's dynamic Host key preference policy, if you prefer to avoid giving away to Eavesdroppers which hosts you have stored keys for.. : the installer UI was illegible in Windows high-contrast Mode.. : console password input failed on Windows 7.. in the terminal: one instance of the dreaded line==NULL" error box, and two other assertion failures.. : potential memory-consuming loop in -compatible padding. of an RSA signature from an agent.. : PSFTP's buffer handling worked badly with some servers particularly proftpd's. mod_sftp ).. : cursor could be wrongly positioned when restoring from. The alternate terminal screen. (A of this type was in 0.59; This is a case that that missed.). : character cell height could be a pixel too small when Running GTK PuTTY on Ubuntu 20.04 (or any other system with a Similarly up-to-date version of Pango).. : old-style (low resolution) scroll wheel events did not Work in GTK 3 PuTTY. This could stop the scroll wheel working at all in VNC.
0.7330 Sep 2019 16:25 minor feature: Security : on Windows, other applications were able to bind to the same TCP port as a PuTTY local port forwarding. Security : in bracketed paste mode, the terminal escape sequences that should delimit the pasted data were appearing together on one side of it, making it possible to misidentify pasted data as manual keyboard input. possibly security-related): an SSH-1 server sending a disconnection message could cause an access to freed memory. Windows Plink would crash on startup if it was acting as a connection-sharing downstream. Windows PuTTY now updates its terminal window size correctly if the screen resolution changes while it's maximised. tweaked terminal handling to prevent lost characters at the ends of lines in gcc's coloured error messages. removed a bad interaction between the 'clear scrollback' operation and mouse selection that could give rise to the dreaded "line==NULL" assertion box.
0.7221 Jul 2019 12:25 minor feature: Security found by the EU-funded bounty: two separate vulnerabilities affecting the obsolete SSH-1 protocol, both available before host key checking a vulnerability in all the SSH client tools (PuTTY, Plink, PSFTP and PSCP) if a malicious program can impersonate Pageant. crash in GSSAPI / Kerberos key exchange affecting third-party GSSAPI providers on Windows (such as MIT Kerberos for Windows). crash in GSSAPI / Kerberos key exchange triggered if the server provided an ordinary SSH host key as part of the exchange. trust sigils were never turned off in SSH-1 or Rlogin. trust sigils were never turned back on if you used Restart Session. PSCP in SCP download mode could create files with a spurious newline at the end of their names. PSCP in SCP download mode with the. -p option would generate spurious complaints about illegal file renaming. the initial instruction message was never printed during SSH. keyboard-interactive authentication. pasting very long lines through connection sharing could crash the downstream PuTTY window. in keyboard layouts with a ',' key on the numeric keypad (e.g. German), Windows PuTTY would generate '.' instead for that key. PuTTYgen could generate RSA keys with a modulus one bit shorter than requested.
0.7117 Mar 2019 11:05 minor feature: Security found by an EU-funded bounty programme: a remotely triggerable memory overwrite in RSA key exchange, which can occur before host key verification potential recycling of random numbers used in cryptography. on Windows, hijacking by a malicious help file in the same directory as the executable. on Unix, remotely triggerable buffer overflow in any kind of server-to-client forwarding. multiple denial-of-service attacks that can be triggered by writing to the terminal. Other security enhancements: major rewrite of the crypto code to remove cache and timing side channels. We now provide pre-built binaries for Windows on Arm. Hardware-accelerated versions of the most common cryptographic primitives: AES, SHA-256, SHA-1. GTK PuTTY now supports non-X11 displays (e.g. Wayland) and high-DPI configurations. Type-ahead now works as soon as a PuTTY window is opened: keystrokes typed before authentication has finished will be buffered instead of being dropped. Support for GSSAPI key exchange: an alternative to the older GSSAPI authentication system which can keep your forwarded Kerberos credentials updated during a long session. More choices of user interface for clipboard handling. New terminal features: support the REP escape sequence, true colour, and SGR 2 dim text. Pressing Ctrl+Shift+PgUp or Ctrl+Shift+PgDn now takes you straight to the top or bottom of the terminal scrollback.
0.7011 Jul 2017 01:25 minor feature: Security : the Windows PuTTY binaries should no longer be Vulnerable to hijacking by specially named DLLs in the same directory, Even a name we missed when we thought we'd this in 0.69. See vuln-indirect-dll-hijack-3. Windows PuTTY should be able to print again, after our DLL. Hijacking defences broke that functionality. Windows PuTTY should be able to accept keyboard input outside the. Current code page, after our DLL hijacking defences broke that too.
0.6726 Mar 2016 21:15 minor feature: Security fix: a buffer overrun in the old-style SCP protocol when receiving the header of each file downloaded from the server is fixed. See vuln-pscp-sink-sscanf. Windows PuTTY now sets its process ACL more restrictively, in an attempt to defend against malicious other processes reading sensitive data out of its memory. Assorted other robustness fixes for crashes and memory leaks. We have started using Authenticode to sign our Windows executables and installer.