[USN-5351-1] Paramiko vulnerability

[Marc Deslauriers]

==========================================================================
Ubuntu Security Notice USN-5351-1
March 28, 2022

paramiko vulnerability
==========================================================================

A security issue affects these releases of Ubuntu and its derivatives:

- Ubuntu 21.10
- Ubuntu 20.04 LTS
- Ubuntu 18.04 LTS

Summary:

Paramiko would allow unintended access to private key files.

Software Description:
- paramiko: Python SSH2 library

Details:

Jan Schejbal discovered that Paramiko incorrectly handled permissions when
writing private key files. A local attacker could possibly use this issue
to gain access to private keys.

Update instructions:

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

Ubuntu 21.10:
  python3-paramiko                2.7.2-1ubuntu1.1

Ubuntu 20.04 LTS:
  python3-paramiko                2.6.0-2ubuntu0.1

Ubuntu 18.04 LTS:
  python-paramiko                 2.0.0-1ubuntu1.3
  python3-paramiko                2.0.0-1ubuntu1.3

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

References:
  https://ubuntu.com/security/notices/USN-5351-1
  CVE-2022-24302

Package Information:
  https://launchpad.net/ubuntu/+source/paramiko/2.7.2-1ubuntu1.1
  https://launchpad.net/ubuntu/+source/paramiko/2.6.0-2ubuntu0.1
  https://launchpad.net/ubuntu/+source/paramiko/2.0.0-1ubuntu1.3
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