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USN-6589-1: FileZilla vulnerability

18 January 2024

FileZilla could be made to expose sensitive information over the network.

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Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

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Releases

Packages

  • filezilla - Full-featured graphical FTP/FTPS/SFTP client

Details

Fabian Baeumer, Marcus Brinkmann and Joerg Schwenk discovered that the SSH
protocol used in FileZilla is prone to a prefix truncation attack, known as
the "Terrapin attack". A remote attacker could use this issue to downgrade or
disable some security features and obtain sensitive information.

Reduce your security exposure

Ubuntu Pro provides ten-year security coverage to 25,000+ packages in Main and Universe repositories, and it is free for up to five machines.

Learn more about Ubuntu Pro

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 23.10
Ubuntu 22.04
Ubuntu 20.04

In general, a standard system update will make all the necessary changes.

References

Related notices

  • USN-6560-1: openssh-sftp-server, openssh, ssh-askpass-gnome, openssh-client, openssh-server, openssh-tests, ssh
  • USN-6561-1: libssh-gcrypt-dev, libssh-4, libssh-doc, libssh, libssh-dev, libssh-gcrypt-4
  • USN-6560-2: openssh-sftp-server, openssh, ssh-askpass-gnome, openssh-client, openssh-server, ssh-krb5, openssh-client-ssh1, ssh
  • USN-6585-1: libssh2-1, libssh2-1-dev, libssh2
  • USN-6598-1: python3-paramiko, paramiko, paramiko-doc
  • USN-6738-1: lxd-tools, lxc2, lxd-client, lxd, golang-github-lxc-lxd-dev