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Ubuntu Security Notice USN-5351-2
March 30, 2022

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

- Ubuntu 16.04 ESM

Summary:

Paramiko would allow unintended access to private key files.

Software Description:
- paramiko: Python SSH2 library

Details:

USN-5351-1 fixed a vulnerability in Paramiko. This update provides
the corresponding update for Ubuntu 16.04 ESM.

Original advisory 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 16.04 ESM:
paramiko-doc 1.16.0-1ubuntu0.2+esm2
python-paramiko 1.16.0-1ubuntu0.2+esm2
python3-paramiko 1.16.0-1ubuntu0.2+esm2

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

References:
https://ubuntu.com/security/notices/USN-5351-2
https://ubuntu.com/security/notices/USN-5351-1
CVE-2022-24302