Fedora 28 : python-paramiko (2018-8f9d81a3fb)

High Nessus Plugin ID 120611

Synopsis

The remote Fedora host is missing a security update.

Description

A flaw was found in the implementation of `transport.py` in Paramiko, which did not properly check whether authentication was completed before processing other requests. A customized SSH client could simply skip the authentication step.

This flaw is a user authentication bypass in the SSH Server functionality of Paramiko. Where Paramiko is used only for its client-side functionality (e.g. `paramiko.SSHClient`), the vulnerability is not exposed and thus cannot be exploited.

This update also fixes an issue where Ed25519 auth key decryption raised an unexpected exception when given a unicode password string (typical in Python 3).

Note that Tenable Network Security has extracted the preceding description block directly from the Fedora update system website.
Tenable has attempted to automatically clean and format it as much as possible without introducing additional issues.

Solution

Update the affected python-paramiko package.

See Also

https://bodhi.fedoraproject.org/updates/FEDORA-2018-8f9d81a3fb

Plugin Details

Severity: High

ID: 120611

File Name: fedora_2018-8f9d81a3fb.nasl

Version: 1.3

Type: local

Agent: unix

Published: 2019/01/03

Updated: 2019/09/23

Dependencies: 12634

Risk Information

Risk Factor: High

CVSS v2.0

Base Score: 7.5

Temporal Score: 5.9

Vector: CVSS2#AV:N/AC:L/Au:N/C:P/I:P/A:P

Temporal Vector: CVSS2#E:POC/RL:OF/RC:C

CVSS v3.0

Base Score: 9.8

Temporal Score: 8.8

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

CPE: p-cpe:/a:fedoraproject:fedora:python-paramiko, cpe:/o:fedoraproject:fedora:28

Required KB Items: Host/local_checks_enabled, Host/RedHat/release, Host/RedHat/rpm-list

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 2018/03/30

Vulnerability Publication Date: 2018/03/13

Reference Information

CVE: CVE-2018-7750