Issued:
2018-03-26
Updated:
2018-03-26

RHSA-2018:0591 - Critical: python-paramiko security and bug fix update

Synopsis

Critical: python-paramiko security and bug fix update

Type/Severity

Security Advisory Critical

Topic

An update for python-paramiko is now available for Red Hat Enterprise Linux 7 Extras.

Red Hat Product Security has rated this update as having a security impact of Critical. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.

Description

The python-paramiko package provides a Python module that implements the SSH2 protocol for encrypted and authenticated connections to remote machines. Unlike SSL, the SSH2 protocol does not require hierarchical certificates signed by a powerful central authority. The protocol also includes the ability to open arbitrary channels to remote services across an encrypted tunnel.

Security Fix(es):

  • python-paramiko: Authentication bypass in transport.py (CVE-2018-7750)

For more details about the security issue(s), including the impact, a CVSS score, and other related information, refer to the CVE page(s) listed in the References section.

Bug Fix(es):

  • python-paramiko has been using the python2-pyasn1 package, but did not depend on it. With new versions of python2-cryptography, python2-pyasn1 was not getting installed and this caused python-paramiko to malfunction. This bug was fixed by making python-paramiko depend on python2-pyasn1 explicitly. (BZ#1559133)

Solution

For details on how to apply this update, which includes the changes described in this advisory, refer to:

https://access.redhat.com/articles/11258

Affected Products

ProductVersionArch
Red Hat Enterprise Linux for Power, little endian7ppc64le
Red Hat Enterprise Linux for Power 97ppc64le
Red Hat Enterprise Linux Server7x86_64

Updated Packages

  • python-paramiko-2.1.1-4.el7.src.rpm
  • python-paramiko-2.1.1-4.el7.noarch.rpm
  • python-paramiko-doc-2.1.1-4.el7.noarch.rpm

Fixes

CVEs

References

Additional information