[USN-5351-1] Paramiko vulnerability

Marc Deslauriers marc.deslauriers at canonical.com
Mon Mar 28 18:16:35 UTC 2022

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


Paramiko would allow unintended access to private key files.

Software Description:
- paramiko: Python SSH2 library


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.


Package Information:
-------------- next part --------------
A non-text attachment was scrubbed...
Name: OpenPGP_signature
Type: application/pgp-signature
Size: 833 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20220328/74931e4b/attachment.sig>

More information about the ubuntu-security-announce mailing list