VULNERABILITY

FreeBSD: VID-46E1ECE5-48BD-11E9-9C40-080027AC955C: PuTTY -- security fixes in new release

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FreeBSD: VID-46E1ECE5-48BD-11E9-9C40-080027AC955C: PuTTY -- security fixes in new release

Severity
10
CVSS
(AV:N/AC:L/Au:N/C:C/I:C/A:C)
Published
03/16/2019
Created
04/22/2019
Added
03/18/2019
Modified
02/19/2025

Description

The PuTTY team reports:

New in 0.71:

Security fixes found by an EU-funded bug 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 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.

User interface changes to protect against fake authentication prompts from a malicious server.

Solution(s)

  • freebsd-upgrade-package-putty
  • freebsd-upgrade-package-putty-gtk2
  • freebsd-upgrade-package-putty-nogtk

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