Putty

Putty v0.80

New update:18.12.2023

These features are new in 0.80 (Released 2023-12-18):

•Security fix: support for OpenSSH's new kex-strict protocol modification, addressing a vulnerability in some @openssh.com cipher and MAC modes, in particular ChaCha20+Poly1305.

•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....

putty v0.81

Security fix for CVE-2024-31497: NIST P521 / ecdsa-sha2-nistp521 signatures are no longer generated with biased values of k. The previous bias compromises private keys.

New in 0.83

• Support for ML-KEM, the NIST-standardised post-quantum key exchange mechanism. (In addition to NTRU Prime, which has been supported since 0.78.)
• Support for full Unicode file names in Windows file selector dialogs. (However, these do not yet round-trip through a saved session.)
• Bug fix: psftp -b works again.
• Bug fix: assertion failure if an SSH connection times out at the login prompt.
• Bug fix: crash in Pageant if an SSH connection is abandoned while waiting for a deferred decryption passphrase.
• Bug fix: tight loop if PuTTY tried to send an empty answerback string.
• Bug fix: accidental truncation of some configuration edit boxes' contents to 127 characters.
• Bug fix: Windows XP support was accidentally broken, and now reinstated.
• Bug fix: restored interoperation with third-party tools that auto-fill login prompts by sending ^M for Return.
• Bug fix: confusion when terminal window resized by tools like FancyZones.
• Bug fix: the small keypad keys didn't reliably work in the terminal on Unix.