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                   Red Hat Security Advisory

Synopsis:          Critical: python-paramiko security and bug fix update
Advisory ID:       RHSA-2018:0591-01
Product:           Red Hat Enterprise Linux Extras
Advisory URL:      https://access.redhat.com/errata/RHSA-2018:0591
Issue date:        2018-03-26
CVE Names:         CVE-2018-7750 
=====================================================================

1. Summary:

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.

2. Relevant releases/architectures:

Red Hat Enterprise Linux 7 Extras - noarch

3. 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)

4. 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

5. Bugs fixed (https://bugzilla.redhat.com/):

1557130 - CVE-2018-7750 python-paramiko: Authentication bypass in transport.py
1559133 - Missing requirements in python-paramiko

6. Package List:

Red Hat Enterprise Linux 7 Extras:

Source:
python-paramiko-2.1.1-4.el7.src.rpm

noarch:
python-paramiko-2.1.1-4.el7.noarch.rpm
python-paramiko-doc-2.1.1-4.el7.noarch.rpm

These packages are GPG signed by Red Hat for security.  Our key and
details on how to verify the signature are available from
https://access.redhat.com/security/team/key/

7. References:

https://access.redhat.com/security/cve/CVE-2018-7750
https://access.redhat.com/security/updates/classification/#critical

8. Contact:

The Red Hat security contact is <secalert@redhat.com>. More contact
details at https://access.redhat.com/security/team/contact/

Copyright 2018 Red Hat, Inc.
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